handle pointers being dumb

* RFC 3339 support for both Marshal and Unmarshal.

* Post merge cleanup

* Update request_test.go

Co-authored-by: Quetzy Garcia <quetzy.garcia@integrate.com>

* Spelling

* Update request.go

Co-authored-by: Quetzy Garcia <quetzy.garcia@integrate.com>

* Simplify the ISO 8601 logic. No need for the const rfc3339TimeFormat use time.RFC3339 directly.

Co-authored-by: Quetzy Garcia <quetzy.garcia@integrate.com>

.travis.yml

@@ -1,7 +1,13 @@
 language: go
+arch:
+  - amd64
+  - ppc64le
 go:
-  - 1.8.x
+  - 1.11.x
-  - 1.9.x
+  - 1.12.x
-  - 1.10.x
+  - 1.13.x
+  - 1.14.x
+  - 1.15.x
+  - 1.16.x
   - tip
 script: go test ./... -v

README.md

@@ -3,10 +3,13 @@
 [![Build Status](https://travis-ci.org/google/jsonapi.svg?branch=master)](https://travis-ci.org/google/jsonapi)
 [![Go Report Card](https://goreportcard.com/badge/github.com/google/jsonapi)](https://goreportcard.com/report/github.com/google/jsonapi)
 [![GoDoc](https://godoc.org/github.com/google/jsonapi?status.svg)](http://godoc.org/github.com/google/jsonapi)
+[![No Maintenance Intended](http://unmaintained.tech/badge.svg)](http://unmaintained.tech/)
 
 A serializer/deserializer for JSON payloads that comply to the
 [JSON API - jsonapi.org](http://jsonapi.org) spec in go.
 
+
+
 ## Installation
 
 ```
@@ -181,7 +184,7 @@ to-many from being serialized.
 **All `Marshal` and `Unmarshal` methods expect pointers to struct
 instance or slices of the same contained with the `interface{}`s**
 
-Now you have your structs prepared to be seralized or materialized, What
+Now you have your structs prepared to be serialized or materialized, What
 about the rest?
 
 ### Create Record Example
@@ -343,6 +346,23 @@ func (post Post) JSONAPIRelationshipMeta(relation string) *Meta {
 }
 ```
 
+### Custom types
+
+Custom types are supported for primitive types, only, as attributes.  Examples,
+
+```go
+type CustomIntType int
+type CustomFloatType float64
+type CustomStringType string
+```
+
+Types like following are not supported, but may be in the future:
+
+```go
+type CustomMapType map[string]interface{}
+type CustomSliceMapType []map[string]interface{}
+```
+
 ### Errors
 This package also implements support for JSON API compatible `errors` payloads using the following types.
 

constants.go

@@ -9,6 +9,7 @@ const (
 	annotationRelation  = "relation"
 	annotationOmitEmpty = "omitempty"
 	annotationISO8601   = "iso8601"
+	annotationRFC3339   = "rfc3339"
 	annotationSeperator = ","
 
 	iso8601TimeFormat = "2006-01-02T15:04:05Z"

doc.go

@@ -2,7 +2,7 @@
 Package jsonapi provides a serializer and deserializer for jsonapi.org spec payloads.
 
 You can keep your model structs as is and use struct field tags to indicate to jsonapi
-how you want your response built or your request deserialzied. What about my relationships?
+how you want your response built or your request deserialized. What about my relationships?
 jsonapi supports relationships out of the box and will even side load them in your response
 into an "included" array--that contains associated objects.
 
@@ -49,7 +49,7 @@ Value, attr: "attr,<key name in attributes hash>[,<extra arguments>]"
 
 These fields' values should end up in the "attribute" hash for a record.  The first
 argument must be, "attr', and the second should be the name for the key to display in
-the the "attributes" hash for that record.
+the "attributes" hash for that record.
 
 The following extra arguments are also supported:
 

errors.go

@@ -12,10 +12,7 @@ import (
 // http://jsonapi.org/format/#document-top-level
 // and here: http://jsonapi.org/format/#error-objects.
 func MarshalErrors(w io.Writer, errorObjects []*ErrorObject) error {
-	if err := json.NewEncoder(w).Encode(&ErrorsPayload{Errors: errorObjects}); err != nil {
+	return json.NewEncoder(w).Encode(&ErrorsPayload{Errors: errorObjects})
-		return err
-	}
-	return nil
 }
 
 // ErrorsPayload is a serializer struct for representing a valid JSON API errors payload.

go.mod

@@ -0,0 +1,3 @@
+module github.com/google/jsonapi
+
+go 1.21

models_test.go

@@ -25,10 +25,14 @@ type WithPointer struct {
 	FloatVal *float32 `jsonapi:"attr,float-val"`
 }
 
-type Timestamp struct {
+type TimestampModel struct {
 	ID       int        `jsonapi:"primary,timestamps"`
-	Time time.Time  `jsonapi:"attr,timestamp,iso8601"`
+	DefaultV time.Time  `jsonapi:"attr,defaultv"`
-	Next *time.Time `jsonapi:"attr,next,iso8601"`
+	DefaultP *time.Time `jsonapi:"attr,defaultp"`
+	ISO8601V time.Time  `jsonapi:"attr,iso8601v,iso8601"`
+	ISO8601P *time.Time `jsonapi:"attr,iso8601p,iso8601"`
+	RFC3339V time.Time  `jsonapi:"attr,rfc3339v,rfc3339"`
+	RFC3339P *time.Time `jsonapi:"attr,rfc3339p,rfc3339"`
 }
 
 type Car struct {
@@ -155,3 +159,39 @@ func (bc *BadComment) JSONAPILinks() *Links {
 		"self": []string{"invalid", "should error"},
 	}
 }
+
+type Company struct {
+	ID        string    `jsonapi:"primary,companies"`
+	Name      string    `jsonapi:"attr,name"`
+	Boss      Employee  `jsonapi:"attr,boss"`
+	Teams     []Team    `jsonapi:"attr,teams"`
+	FoundedAt time.Time `jsonapi:"attr,founded-at,iso8601"`
+}
+
+type Team struct {
+	Name    string     `jsonapi:"attr,name"`
+	Leader  *Employee  `jsonapi:"attr,leader"`
+	Members []Employee `jsonapi:"attr,members"`
+}
+
+type Employee struct {
+	Firstname string     `jsonapi:"attr,firstname"`
+	Surname   string     `jsonapi:"attr,surname"`
+	Age       int        `jsonapi:"attr,age"`
+	HiredAt   *time.Time `jsonapi:"attr,hired-at,iso8601"`
+}
+
+type CustomIntType int
+type CustomFloatType float64
+type CustomStringType string
+
+type CustomAttributeTypes struct {
+	ID string `jsonapi:"primary,customtypes"`
+
+	Int        CustomIntType  `jsonapi:"attr,int"`
+	IntPtr     *CustomIntType `jsonapi:"attr,intptr"`
+	IntPtrNull *CustomIntType `jsonapi:"attr,intptrnull"`
+
+	Float  CustomFloatType  `jsonapi:"attr,float"`
+	String CustomStringType `jsonapi:"attr,string"`
+}

request.go

@@ -13,7 +13,7 @@ import (
 )
 
 const (
-	unsuportedStructTagMsg = "Unsupported jsonapi tag annotation, %s"
+	unsupportedStructTagMsg = "Unsupported jsonapi tag annotation, %s"
 )
 
 var (
@@ -23,17 +23,42 @@ var (
 	// ErrInvalidISO8601 is returned when a struct has a time.Time type field and includes
 	// "iso8601" in the tag spec, but the JSON value was not an ISO8601 timestamp string.
 	ErrInvalidISO8601 = errors.New("Only strings can be parsed as dates, ISO8601 timestamps")
+	// ErrInvalidRFC3339 is returned when a struct has a time.Time type field and includes
+	// "rfc3339" in the tag spec, but the JSON value was not an RFC3339 timestamp string.
+	ErrInvalidRFC3339 = errors.New("Only strings can be parsed as dates, RFC3339 timestamps")
 	// ErrUnknownFieldNumberType is returned when the JSON value was a float
 	// (numeric) but the Struct field was a non numeric type (i.e. not int, uint,
 	// float, etc)
 	ErrUnknownFieldNumberType = errors.New("The struct field was not of a known number type")
-	// ErrUnsupportedPtrType is returned when the Struct field was a pointer but
-	// the JSON value was of a different type
-	ErrUnsupportedPtrType = errors.New("Pointer type in struct is not supported")
 	// ErrInvalidType is returned when the given type is incompatible with the expected type.
 	ErrInvalidType = errors.New("Invalid type provided") // I wish we used punctuation.
+
 )
 
+// ErrUnsupportedPtrType is returned when the Struct field was a pointer but
+// the JSON value was of a different type
+type ErrUnsupportedPtrType struct {
+	rf          reflect.Value
+	t           reflect.Type
+	structField reflect.StructField
+}
+
+func (eupt ErrUnsupportedPtrType) Error() string {
+	typeName := eupt.t.Elem().Name()
+	kind := eupt.t.Elem().Kind()
+	if kind.String() != "" && kind.String() != typeName {
+		typeName = fmt.Sprintf("%s (%s)", typeName, kind.String())
+	}
+	return fmt.Sprintf(
+		"jsonapi: Can't unmarshal %+v (%s) to struct field `%s`, which is a pointer to `%s`",
+		eupt.rf, eupt.rf.Type().Kind(), eupt.structField.Name, typeName,
+	)
+}
+
+func newErrUnsupportedPtrType(rf reflect.Value, t reflect.Type, structField reflect.StructField) error {
+	return ErrUnsupportedPtrType{rf, t, structField}
+}
+
 // UnmarshalPayload converts an io into a struct instance using jsonapi tags on
 // struct fields. This method supports single request payloads only, at the
 // moment. Bulk creates and updates are not supported yet.
@@ -88,14 +113,14 @@ func UnmarshalPayload(in io.Reader, model interface{}) error {
 
 // UnmarshalManyPayload converts an io into a set of struct instances using
 // jsonapi tags on the type's struct fields.
-func UnmarshalManyPayload(in io.Reader, t reflect.Type) ([]interface{}, error) {
+func UnmarshalManyPayload[T any](in io.Reader) ([]T, error) {
 	payload := new(ManyPayload)
 
 	if err := json.NewDecoder(in).Decode(payload); err != nil {
 		return nil, err
 	}
 
-	models := []interface{}{}         // will be populated from the "data"
+	models := make([]T, 0, len(payload.Data))         // will be populated from the "data"
 	includedMap := map[string]*Node{} // will be populate from the "included"
 
 	if payload.Included != nil {
@@ -106,12 +131,12 @@ func UnmarshalManyPayload(in io.Reader, t reflect.Type) ([]interface{}, error) {
 	}
 
 	for _, data := range payload.Data {
-		model := reflect.New(t.Elem())
+		model := new(T)
-		err := unmarshalNode(data, model, &includedMap)
+		err := unmarshalNode(data, reflect.ValueOf(model), &includedMap)
 		if err != nil {
 			return nil, err
 		}
-		models = append(models, model.Interface())
+		models = append(models, *model)
 	}
 
 	return models, nil
@@ -125,7 +150,7 @@ func unmarshalNode(data *Node, model reflect.Value, included *map[string]*Node)
 	}()
 
 	modelValue := model.Elem()
-	modelType := model.Type().Elem()
+	modelType := modelValue.Type()
 
 	var er error
 
@@ -139,7 +164,6 @@ func unmarshalNode(data *Node, model reflect.Value, included *map[string]*Node)
 		fieldValue := modelValue.Field(i)
 
 		args := strings.Split(tag, ",")
-
 		if len(args) < 1 {
 			er = ErrBadJSONAPIStructTag
 			break
@@ -154,10 +178,6 @@ func unmarshalNode(data *Node, model reflect.Value, included *map[string]*Node)
 		}
 
 		if annotation == annotationPrimary {
-			if data.ID == "" {
-				continue
-			}
-
 			// Check the JSON API Type
 			if data.Type != args[1] {
 				er = fmt.Errorf(
@@ -168,6 +188,10 @@ func unmarshalNode(data *Node, model reflect.Value, included *map[string]*Node)
 				break
 			}
 
+			if data.ID == "" {
+				continue
+			}
+
 			// ID will have to be transmitted as astring per the JSON API spec
 			v := reflect.ValueOf(data.ID)
 
@@ -196,39 +220,8 @@ func unmarshalNode(data *Node, model reflect.Value, included *map[string]*Node)
 
 			// Convert the numeric float to one of the supported ID numeric types
 			// (int[8,16,32,64] or uint[8,16,32,64])
-			var idValue reflect.Value
+			idValue, err := handleNumeric(floatValue, fieldType.Type, fieldValue)
-			switch kind {
+			if err != nil {
-			case reflect.Int:
-				n := int(floatValue)
-				idValue = reflect.ValueOf(&n)
-			case reflect.Int8:
-				n := int8(floatValue)
-				idValue = reflect.ValueOf(&n)
-			case reflect.Int16:
-				n := int16(floatValue)
-				idValue = reflect.ValueOf(&n)
-			case reflect.Int32:
-				n := int32(floatValue)
-				idValue = reflect.ValueOf(&n)
-			case reflect.Int64:
-				n := int64(floatValue)
-				idValue = reflect.ValueOf(&n)
-			case reflect.Uint:
-				n := uint(floatValue)
-				idValue = reflect.ValueOf(&n)
-			case reflect.Uint8:
-				n := uint8(floatValue)
-				idValue = reflect.ValueOf(&n)
-			case reflect.Uint16:
-				n := uint16(floatValue)
-				idValue = reflect.ValueOf(&n)
-			case reflect.Uint32:
-				n := uint32(floatValue)
-				idValue = reflect.ValueOf(&n)
-			case reflect.Uint64:
-				n := uint64(floatValue)
-				idValue = reflect.ValueOf(&n)
-			default:
 				// We had a JSON float (numeric), but our field was not one of the
 				// allowed numeric types
 				er = ErrBadJSONAPIID
@@ -244,213 +237,26 @@ func unmarshalNode(data *Node, model reflect.Value, included *map[string]*Node)
 			fieldValue.Set(reflect.ValueOf(data.ClientID))
 		} else if annotation == annotationAttribute {
 			attributes := data.Attributes
+
 			if attributes == nil || len(data.Attributes) == 0 {
 				continue
 			}
 
-			var iso8601 bool
+			attribute := attributes[args[1]]
-
-			if len(args) > 2 {
-				for _, arg := range args[2:] {
-					if arg == annotationISO8601 {
-						iso8601 = true
-					}
-				}
-			}
-
-			val := attributes[args[1]]
 
 			// continue if the attribute was not included in the request
-			if val == nil {
+			if attribute == nil {
 				continue
 			}
 
-			v := reflect.ValueOf(val)
+			structField := fieldType
-
+			value, err := unmarshalAttribute(attribute, args, structField, fieldValue)
-			// Handle field of type time.Time
-			if fieldValue.Type() == reflect.TypeOf(time.Time{}) {
-				if iso8601 {
-					var tm string
-					if v.Kind() == reflect.String {
-						tm = v.Interface().(string)
-					} else {
-						er = ErrInvalidISO8601
-						break
-					}
-
-					t, err := time.Parse(iso8601TimeFormat, tm)
 			if err != nil {
-						er = ErrInvalidISO8601
+				er = err
 				break
 			}
 
-					fieldValue.Set(reflect.ValueOf(t))
+			assign(fieldValue, value)
-
-					continue
-				}
-
-				var at int64
-
-				if v.Kind() == reflect.Float64 {
-					at = int64(v.Interface().(float64))
-				} else if v.Kind() == reflect.Int {
-					at = v.Int()
-				} else {
-					return ErrInvalidTime
-				}
-
-				t := time.Unix(at, 0)
-
-				fieldValue.Set(reflect.ValueOf(t))
-
-				continue
-			}
-
-			if fieldValue.Type() == reflect.TypeOf([]string{}) {
-				values := make([]string, v.Len())
-				for i := 0; i < v.Len(); i++ {
-					values[i] = v.Index(i).Interface().(string)
-				}
-
-				fieldValue.Set(reflect.ValueOf(values))
-
-				continue
-			}
-
-			if fieldValue.Type() == reflect.TypeOf(new(time.Time)) {
-				if iso8601 {
-					var tm string
-					if v.Kind() == reflect.String {
-						tm = v.Interface().(string)
-					} else {
-						er = ErrInvalidISO8601
-						break
-					}
-
-					v, err := time.Parse(iso8601TimeFormat, tm)
-					if err != nil {
-						er = ErrInvalidISO8601
-						break
-					}
-
-					t := &v
-
-					fieldValue.Set(reflect.ValueOf(t))
-
-					continue
-				}
-
-				var at int64
-
-				if v.Kind() == reflect.Float64 {
-					at = int64(v.Interface().(float64))
-				} else if v.Kind() == reflect.Int {
-					at = v.Int()
-				} else {
-					return ErrInvalidTime
-				}
-
-				v := time.Unix(at, 0)
-				t := &v
-
-				fieldValue.Set(reflect.ValueOf(t))
-
-				continue
-			}
-
-			// JSON value was a float (numeric)
-			if v.Kind() == reflect.Float64 {
-				floatValue := v.Interface().(float64)
-
-				// The field may or may not be a pointer to a numeric; the kind var
-				// will not contain a pointer type
-				var kind reflect.Kind
-				if fieldValue.Kind() == reflect.Ptr {
-					kind = fieldType.Type.Elem().Kind()
-				} else {
-					kind = fieldType.Type.Kind()
-				}
-
-				var numericValue reflect.Value
-
-				switch kind {
-				case reflect.Int:
-					n := int(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Int8:
-					n := int8(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Int16:
-					n := int16(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Int32:
-					n := int32(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Int64:
-					n := int64(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Uint:
-					n := uint(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Uint8:
-					n := uint8(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Uint16:
-					n := uint16(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Uint32:
-					n := uint32(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Uint64:
-					n := uint64(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Float32:
-					n := float32(floatValue)
-					numericValue = reflect.ValueOf(&n)
-				case reflect.Float64:
-					n := floatValue
-					numericValue = reflect.ValueOf(&n)
-				default:
-					return ErrUnknownFieldNumberType
-				}
-
-				assign(fieldValue, numericValue)
-				continue
-			}
-
-			// Field was a Pointer type
-			if fieldValue.Kind() == reflect.Ptr {
-				var concreteVal reflect.Value
-
-				switch cVal := val.(type) {
-				case string:
-					concreteVal = reflect.ValueOf(&cVal)
-				case bool:
-					concreteVal = reflect.ValueOf(&cVal)
-				case complex64:
-					concreteVal = reflect.ValueOf(&cVal)
-				case complex128:
-					concreteVal = reflect.ValueOf(&cVal)
-				case uintptr:
-					concreteVal = reflect.ValueOf(&cVal)
-				default:
-					return ErrUnsupportedPtrType
-				}
-
-				if fieldValue.Type() != concreteVal.Type() {
-					return ErrUnsupportedPtrType
-				}
-
-				fieldValue.Set(concreteVal)
-				continue
-			}
-
-			// As a final catch-all, ensure types line up to avoid a runtime panic.
-			if fieldValue.Kind() != v.Kind() {
-				return ErrInvalidType
-			}
-			fieldValue.Set(reflect.ValueOf(val))
-
 		} else if annotation == annotationRelation {
 			isSlice := fieldValue.Type().Kind() == reflect.Slice
 
@@ -522,7 +328,7 @@ func unmarshalNode(data *Node, model reflect.Value, included *map[string]*Node)
 			}
 
 		} else {
-			er = fmt.Errorf(unsuportedStructTagMsg, annotation)
+			er = fmt.Errorf(unsupportedStructTagMsg, annotation)
 		}
 	}
 
@@ -542,9 +348,309 @@ func fullNode(n *Node, included *map[string]*Node) *Node {
 // assign will take the value specified and assign it to the field; if
 // field is expecting a ptr assign will assign a ptr.
 func assign(field, value reflect.Value) {
+	value = reflect.Indirect(value)
+
 	if field.Kind() == reflect.Ptr {
+		// initialize pointer so it's value
+		// can be set by assignValue
+		field.Set(reflect.New(field.Type().Elem()))
+		field = field.Elem()
+
+	}
+
+	assignValue(field, value)
+}
+
+// assign assigns the specified value to the field,
+// expecting both values not to be pointer types.
+func assignValue(field, value reflect.Value) {
+	switch field.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16,
+		reflect.Int32, reflect.Int64:
+		field.SetInt(value.Int())
+	case reflect.Uint, reflect.Uint8, reflect.Uint16,
+		reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		field.SetUint(value.Uint())
+	case reflect.Float32, reflect.Float64:
+		field.SetFloat(value.Float())
+	case reflect.String:
+		field.SetString(value.String())
+	case reflect.Bool:
+		field.SetBool(value.Bool())
+	default:
 		field.Set(value)
+	}
+}
+
+func unmarshalAttribute(
+	attribute interface{},
+	args []string,
+	structField reflect.StructField,
+	fieldValue reflect.Value) (value reflect.Value, err error) {
+	value = reflect.ValueOf(attribute)
+	fieldType := structField.Type
+
+	// Handle field of type []string
+	if fieldValue.Type() == reflect.TypeOf([]string{}) {
+		value, err = handleStringSlice(attribute)
+		return
+	}
+
+	// Handle field of type time.Time
+	if fieldValue.Type() == reflect.TypeOf(time.Time{}) ||
+		fieldValue.Type() == reflect.TypeOf(new(time.Time)) {
+		value, err = handleTime(attribute, args, fieldValue)
+		return
+	}
+
+	// Handle field of type struct
+	if fieldValue.Type().Kind() == reflect.Struct {
+		value, err = handleStruct(attribute, fieldValue)
+		return
+	}
+
+	// Handle field containing slice of structs
+	if fieldValue.Type().Kind() == reflect.Slice &&
+		reflect.TypeOf(fieldValue.Interface()).Elem().Kind() == reflect.Struct {
+		value, err = handleStructSlice(attribute, fieldValue)
+		return
+	}
+
+	// JSON value was a float (numeric)
+	if value.Kind() == reflect.Float64 {
+		value, err = handleNumeric(attribute, fieldType, fieldValue)
+		return
+	}
+
+	// Field was a Pointer type
+	if fieldValue.Kind() == reflect.Ptr {
+		value, err = handlePointer(attribute, args, fieldType, fieldValue, structField)
+		return
+	}
+
+	// As a final catch-all, ensure types line up to avoid a runtime panic.
+	if fieldValue.Kind() != value.Kind() {
+		err = ErrInvalidType
+		return
+	}
+
+	return
+}
+
+func handleStringSlice(attribute interface{}) (reflect.Value, error) {
+	v := reflect.ValueOf(attribute)
+	values := make([]string, v.Len())
+	for i := 0; i < v.Len(); i++ {
+		values[i] = v.Index(i).Interface().(string)
+	}
+
+	return reflect.ValueOf(values), nil
+}
+
+func handleTime(attribute interface{}, args []string, fieldValue reflect.Value) (reflect.Value, error) {
+	var isISO8601, isRFC3339 bool
+	v := reflect.ValueOf(attribute)
+
+	if len(args) > 2 {
+		for _, arg := range args[2:] {
+			if arg == annotationISO8601 {
+				isISO8601 = true
+			} else if arg == annotationRFC3339 {
+				isRFC3339 = true
+			}
+		}
+	}
+
+	if isISO8601 {
+		if v.Kind() != reflect.String {
+			return reflect.ValueOf(time.Now()), ErrInvalidISO8601
+		}
+
+		t, err := time.Parse(iso8601TimeFormat, v.Interface().(string))
+		if err != nil {
+			return reflect.ValueOf(time.Now()), ErrInvalidISO8601
+		}
+
+		if fieldValue.Kind() == reflect.Ptr {
+			return reflect.ValueOf(&t), nil
+		}
+
+		return reflect.ValueOf(t), nil
+	}
+
+	if isRFC3339 {
+		if v.Kind() != reflect.String {
+			return reflect.ValueOf(time.Now()), ErrInvalidRFC3339
+		}
+
+		t, err := time.Parse(time.RFC3339, v.Interface().(string))
+		if err != nil {
+			return reflect.ValueOf(time.Now()), ErrInvalidRFC3339
+		}
+
+		if fieldValue.Kind() == reflect.Ptr {
+			return reflect.ValueOf(&t), nil
+		}
+
+		return reflect.ValueOf(t), nil
+	}
+
+	var at int64
+
+	if v.Kind() == reflect.Float64 {
+		at = int64(v.Interface().(float64))
+	} else if v.Kind() == reflect.Int {
+		at = v.Int()
 	} else {
-		field.Set(reflect.Indirect(value))
+		return reflect.ValueOf(time.Now()), ErrInvalidTime
 	}
+
+	t := time.Unix(at, 0)
+
+	return reflect.ValueOf(t), nil
+}
+
+func handleNumeric(
+	attribute interface{},
+	fieldType reflect.Type,
+	fieldValue reflect.Value) (reflect.Value, error) {
+	v := reflect.ValueOf(attribute)
+	floatValue := v.Interface().(float64)
+
+	var kind reflect.Kind
+	if fieldValue.Kind() == reflect.Ptr {
+		kind = fieldType.Elem().Kind()
+	} else {
+		kind = fieldType.Kind()
+	}
+
+	var numericValue reflect.Value
+
+	switch kind {
+	case reflect.Int:
+		n := int(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Int8:
+		n := int8(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Int16:
+		n := int16(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Int32:
+		n := int32(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Int64:
+		n := int64(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Uint:
+		n := uint(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Uint8:
+		n := uint8(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Uint16:
+		n := uint16(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Uint32:
+		n := uint32(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Uint64:
+		n := uint64(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Float32:
+		n := float32(floatValue)
+		numericValue = reflect.ValueOf(&n)
+	case reflect.Float64:
+		n := floatValue
+		numericValue = reflect.ValueOf(&n)
+	default:
+		return reflect.Value{}, ErrUnknownFieldNumberType
+	}
+
+	return numericValue, nil
+}
+
+func handlePointer(
+	attribute interface{},
+	args []string,
+	fieldType reflect.Type,
+	fieldValue reflect.Value,
+	structField reflect.StructField) (reflect.Value, error) {
+	t := fieldValue.Type()
+	var concreteVal reflect.Value
+
+	switch cVal := attribute.(type) {
+	case string:
+		concreteVal = reflect.ValueOf(&cVal)
+	case bool:
+		concreteVal = reflect.ValueOf(&cVal)
+	case complex64, complex128, uintptr:
+		concreteVal = reflect.ValueOf(&cVal)
+	case map[string]interface{}:
+		var err error
+		concreteVal, err = handleStruct(attribute, fieldValue)
+		if err != nil {
+			return reflect.Value{}, newErrUnsupportedPtrType(
+				reflect.ValueOf(attribute), fieldType, structField)
+		}
+		return concreteVal, err
+	default:
+		return reflect.Value{}, newErrUnsupportedPtrType(
+			reflect.ValueOf(attribute), fieldType, structField)
+	}
+
+	if t != concreteVal.Type() {
+		return reflect.Value{}, newErrUnsupportedPtrType(
+			reflect.ValueOf(attribute), fieldType, structField)
+	}
+
+	return concreteVal, nil
+}
+
+func handleStruct(
+	attribute interface{},
+	fieldValue reflect.Value) (reflect.Value, error) {
+
+	data, err := json.Marshal(attribute)
+	if err != nil {
+		return reflect.Value{}, err
+	}
+
+	node := new(Node)
+	if err := json.Unmarshal(data, &node.Attributes); err != nil {
+		return reflect.Value{}, err
+	}
+
+	var model reflect.Value
+	if fieldValue.Kind() == reflect.Ptr {
+		model = reflect.New(fieldValue.Type().Elem())
+	} else {
+		model = reflect.New(fieldValue.Type())
+	}
+
+	if err := unmarshalNode(node, model, nil); err != nil {
+		return reflect.Value{}, err
+	}
+
+	return model, nil
+}
+
+func handleStructSlice(
+	attribute interface{},
+	fieldValue reflect.Value) (reflect.Value, error) {
+	models := reflect.New(fieldValue.Type()).Elem()
+	dataMap := reflect.ValueOf(attribute).Interface().([]interface{})
+	for _, data := range dataMap {
+		model := reflect.New(fieldValue.Type().Elem()).Elem()
+
+		value, err := handleStruct(data, model)
+
+		if err != nil {
+			continue
+		}
+
+		models = reflect.Append(models, reflect.Indirect(value))
+	}
+
+	return models, nil
 }

request_test.go

@@ -3,6 +3,7 @@ package jsonapi
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"reflect"
@@ -70,11 +71,20 @@ func TestUnmarshalToStructWithPointerAttr(t *testing.T) {
 	}
 }
 
+func TestUnmarshalPayload_missingTypeFieldShouldError(t *testing.T) {
+	if err := UnmarshalPayload(
+		strings.NewReader(`{"data":{"body":"hello world"}}`),
+		&Post{},
+	); err == nil {
+		t.Fatalf("Expected an error but did not get one")
+	}
+}
+
 func TestUnmarshalPayload_ptrsAllNil(t *testing.T) {
 	out := new(WithPointer)
 	if err := UnmarshalPayload(
-		strings.NewReader(`{"data": {}}`), out); err != nil {
+		strings.NewReader(`{"data":{"type":"with-pointers"}}`), out); err != nil {
-		t.Fatalf("Error unmarshalling to Foo")
+		t.Fatalf("Error unmarshalling to Foo: %v", err)
 	}
 
 	if out.ID != nil {
@@ -121,12 +131,12 @@ func TestUnmarshalPayloadWithPointerAttr_AbsentVal(t *testing.T) {
 	}
 }
 
-func TestUnmarshalToStructWithPointerAttr_BadType(t *testing.T) {
+func TestUnmarshalToStructWithPointerAttr_BadType_bool(t *testing.T) {
 	out := new(WithPointer)
 	in := map[string]interface{}{
 		"name": true, // This is the wrong type.
 	}
-	expectedErrorMessage := ErrUnsupportedPtrType.Error()
+	expectedErrorMessage := "jsonapi: Can't unmarshal true (bool) to struct field `Name`, which is a pointer to `string`"
 
 	err := UnmarshalPayload(sampleWithPointerPayload(in), out)
 
@@ -136,6 +146,71 @@ func TestUnmarshalToStructWithPointerAttr_BadType(t *testing.T) {
 	if err.Error() != expectedErrorMessage {
 		t.Fatalf("Unexpected error message: %s", err.Error())
 	}
+	if _, ok := err.(ErrUnsupportedPtrType); !ok {
+		t.Fatalf("Unexpected error type: %s", reflect.TypeOf(err))
+	}
+}
+
+func TestUnmarshalToStructWithPointerAttr_BadType_MapPtr(t *testing.T) {
+	out := new(WithPointer)
+	in := map[string]interface{}{
+		"name": &map[string]interface{}{"a": 5}, // This is the wrong type.
+	}
+	expectedErrorMessage := "jsonapi: Can't unmarshal map[a:5] (map) to struct field `Name`, which is a pointer to `string`"
+
+	err := UnmarshalPayload(sampleWithPointerPayload(in), out)
+
+	if err == nil {
+		t.Fatalf("Expected error due to invalid type.")
+	}
+	if err.Error() != expectedErrorMessage {
+		t.Fatalf("Unexpected error message: %s", err.Error())
+	}
+	if _, ok := err.(ErrUnsupportedPtrType); !ok {
+		t.Fatalf("Unexpected error type: %s", reflect.TypeOf(err))
+	}
+}
+
+func TestUnmarshalToStructWithPointerAttr_BadType_Struct(t *testing.T) {
+	out := new(WithPointer)
+	type FooStruct struct{ A int }
+	in := map[string]interface{}{
+		"name": FooStruct{A: 5}, // This is the wrong type.
+	}
+	expectedErrorMessage := "jsonapi: Can't unmarshal map[A:5] (map) to struct field `Name`, which is a pointer to `string`"
+
+	err := UnmarshalPayload(sampleWithPointerPayload(in), out)
+
+	if err == nil {
+		t.Fatalf("Expected error due to invalid type.")
+	}
+	if err.Error() != expectedErrorMessage {
+		t.Fatalf("Unexpected error message: %s", err.Error())
+	}
+	if _, ok := err.(ErrUnsupportedPtrType); !ok {
+		t.Fatalf("Unexpected error type: %s", reflect.TypeOf(err))
+	}
+}
+
+func TestUnmarshalToStructWithPointerAttr_BadType_IntSlice(t *testing.T) {
+	out := new(WithPointer)
+	type FooStruct struct{ A, B int }
+	in := map[string]interface{}{
+		"name": []int{4, 5}, // This is the wrong type.
+	}
+	expectedErrorMessage := "jsonapi: Can't unmarshal [4 5] (slice) to struct field `Name`, which is a pointer to `string`"
+
+	err := UnmarshalPayload(sampleWithPointerPayload(in), out)
+
+	if err == nil {
+		t.Fatalf("Expected error due to invalid type.")
+	}
+	if err.Error() != expectedErrorMessage {
+		t.Fatalf("Unexpected error message: %s", err.Error())
+	}
+	if _, ok := err.(ErrUnsupportedPtrType); !ok {
+		t.Fatalf("Unexpected error type: %s", reflect.TypeOf(err))
+	}
 }
 
 func TestStringPointerField(t *testing.T) {
@@ -236,7 +311,10 @@ func TestUnmarshalSetsID(t *testing.T) {
 func TestUnmarshal_nonNumericID(t *testing.T) {
 	data := samplePayloadWithoutIncluded()
 	data["data"].(map[string]interface{})["id"] = "non-numeric-id"
-	payload, _ := payload(data)
+	payload, err := json.Marshal(data)
+	if err != nil {
+		t.Fatal(err)
+	}
 	in := bytes.NewReader(payload)
 	out := new(Post)
 
@@ -264,80 +342,183 @@ func TestUnmarshalSetsAttrs(t *testing.T) {
 	}
 }
 
-func TestUnmarshalParsesISO8601(t *testing.T) {
+func TestUnmarshal_Times(t *testing.T) {
-	payload := &OnePayload{
+	aTime := time.Date(2016, 8, 17, 8, 27, 12, 0, time.UTC)
+
+	for _, tc := range []struct {
+		desc         string
+		inputPayload *OnePayload
+		wantErr      bool
+		verification func(tm *TimestampModel) error
+	}{
+		// Default:
+		{
+			desc: "default_byValue",
+			inputPayload: &OnePayload{
 				Data: &Node{
 					Type: "timestamps",
 					Attributes: map[string]interface{}{
-				"timestamp": "2016-08-17T08:27:12Z",
+						"defaultv": aTime.Unix(),
 					},
 				},
+			},
+			verification: func(tm *TimestampModel) error {
+				if !tm.DefaultV.Equal(aTime) {
+					return errors.New("times not equal!")
 				}
-
+				return nil
+			},
+		},
+		{
+			desc: "default_byPointer",
+			inputPayload: &OnePayload{
+				Data: &Node{
+					Type: "timestamps",
+					Attributes: map[string]interface{}{
+						"defaultp": aTime.Unix(),
+					},
+				},
+			},
+			verification: func(tm *TimestampModel) error {
+				if !tm.DefaultP.Equal(aTime) {
+					return errors.New("times not equal!")
+				}
+				return nil
+			},
+		},
+		{
+			desc: "default_invalid",
+			inputPayload: &OnePayload{
+				Data: &Node{
+					Type: "timestamps",
+					Attributes: map[string]interface{}{
+						"defaultv": "not a timestamp!",
+					},
+				},
+			},
+			wantErr: true,
+		},
+		// ISO 8601:
+		{
+			desc: "iso8601_byValue",
+			inputPayload: &OnePayload{
+				Data: &Node{
+					Type: "timestamps",
+					Attributes: map[string]interface{}{
+						"iso8601v": "2016-08-17T08:27:12Z",
+					},
+				},
+			},
+			verification: func(tm *TimestampModel) error {
+				if !tm.ISO8601V.Equal(aTime) {
+					return errors.New("times not equal!")
+				}
+				return nil
+			},
+		},
+		{
+			desc: "iso8601_byPointer",
+			inputPayload: &OnePayload{
+				Data: &Node{
+					Type: "timestamps",
+					Attributes: map[string]interface{}{
+						"iso8601p": "2016-08-17T08:27:12Z",
+					},
+				},
+			},
+			verification: func(tm *TimestampModel) error {
+				if !tm.ISO8601P.Equal(aTime) {
+					return errors.New("times not equal!")
+				}
+				return nil
+			},
+		},
+		{
+			desc: "iso8601_invalid",
+			inputPayload: &OnePayload{
+				Data: &Node{
+					Type: "timestamps",
+					Attributes: map[string]interface{}{
+						"iso8601v": "not a timestamp",
+					},
+				},
+			},
+			wantErr: true,
+		},
+		// RFC 3339
+		{
+			desc: "rfc3339_byValue",
+			inputPayload: &OnePayload{
+				Data: &Node{
+					Type: "timestamps",
+					Attributes: map[string]interface{}{
+						"rfc3339v": "2016-08-17T08:27:12Z",
+					},
+				},
+			},
+			verification: func(tm *TimestampModel) error {
+				if got, want := tm.RFC3339V, aTime; got != want {
+					return fmt.Errorf("got %v, want %v", got, want)
+				}
+				return nil
+			},
+		},
+		{
+			desc: "rfc3339_byPointer",
+			inputPayload: &OnePayload{
+				Data: &Node{
+					Type: "timestamps",
+					Attributes: map[string]interface{}{
+						"rfc3339p": "2016-08-17T08:27:12Z",
+					},
+				},
+			},
+			verification: func(tm *TimestampModel) error {
+				if got, want := *tm.RFC3339P, aTime; got != want {
+					return fmt.Errorf("got %v, want %v", got, want)
+				}
+				return nil
+			},
+		},
+		{
+			desc: "rfc3339_invalid",
+			inputPayload: &OnePayload{
+				Data: &Node{
+					Type: "timestamps",
+					Attributes: map[string]interface{}{
+						"rfc3339v": "not a timestamp",
+					},
+				},
+			},
+			wantErr: true,
+		},
+	} {
+		t.Run(tc.desc, func(t *testing.T) {
+			// Serialize the OnePayload using the standard JSON library.
 			in := bytes.NewBuffer(nil)
-	json.NewEncoder(in).Encode(payload)
+			if err := json.NewEncoder(in).Encode(tc.inputPayload); err != nil {
-
-	out := new(Timestamp)
-
-	if err := UnmarshalPayload(in, out); err != nil {
 				t.Fatal(err)
 			}
 
-	expected := time.Date(2016, 8, 17, 8, 27, 12, 0, time.UTC)
+			out := &TimestampModel{}
-
+			err := UnmarshalPayload(in, out)
-	if !out.Time.Equal(expected) {
+			if got, want := (err != nil), tc.wantErr; got != want {
-		t.Fatal("Parsing the ISO8601 timestamp failed")
+				t.Fatalf("UnmarshalPayload error: got %v, want %v", got, want)
 			}
-}
+			if tc.verification != nil {
-
+				if err := tc.verification(out); err != nil {
-func TestUnmarshalParsesISO8601TimePointer(t *testing.T) {
-	payload := &OnePayload{
-		Data: &Node{
-			Type: "timestamps",
-			Attributes: map[string]interface{}{
-				"next": "2016-08-17T08:27:12Z",
-			},
-		},
-	}
-
-	in := bytes.NewBuffer(nil)
-	json.NewEncoder(in).Encode(payload)
-
-	out := new(Timestamp)
-
-	if err := UnmarshalPayload(in, out); err != nil {
 					t.Fatal(err)
 				}
-
-	expected := time.Date(2016, 8, 17, 8, 27, 12, 0, time.UTC)
-
-	if !out.Next.Equal(expected) {
-		t.Fatal("Parsing the ISO8601 timestamp failed")
 			}
-}
+		})
-
-func TestUnmarshalInvalidISO8601(t *testing.T) {
-	payload := &OnePayload{
-		Data: &Node{
-			Type: "timestamps",
-			Attributes: map[string]interface{}{
-				"timestamp": "17 Aug 16 08:027 MST",
-			},
-		},
-	}
-
-	in := bytes.NewBuffer(nil)
-	json.NewEncoder(in).Encode(payload)
-
-	out := new(Timestamp)
-
-	if err := UnmarshalPayload(in, out); err != ErrInvalidISO8601 {
-		t.Fatalf("Expected ErrInvalidISO8601, got %v", err)
 	}
 }
 
 func TestUnmarshalRelationshipsWithoutIncluded(t *testing.T) {
-	data, _ := payload(samplePayloadWithoutIncluded())
+	data, err := json.Marshal(samplePayloadWithoutIncluded())
+	if err != nil {
+		t.Fatal(err)
+	}
 	in := bytes.NewReader(data)
 	out := new(Post)
 
@@ -603,7 +784,7 @@ func TestUnmarshalManyPayload(t *testing.T) {
 	}
 	in := bytes.NewReader(data)
 
-	posts, err := UnmarshalManyPayload(in, reflect.TypeOf(new(Post)))
+	posts, err := UnmarshalManyPayload[Post](in)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -611,13 +792,6 @@ func TestUnmarshalManyPayload(t *testing.T) {
 	if len(posts) != 2 {
 		t.Fatal("Wrong number of posts")
 	}
-
-	for _, p := range posts {
-		_, ok := p.(*Post)
-		if !ok {
-			t.Fatal("Was expecting a Post")
-		}
-	}
 }
 
 func TestManyPayload_withLinks(t *testing.T) {
@@ -703,6 +877,86 @@ func TestManyPayload_withLinks(t *testing.T) {
 	}
 }
 
+func TestUnmarshalCustomTypeAttributes(t *testing.T) {
+	customInt := CustomIntType(5)
+	customFloat := CustomFloatType(1.5)
+	customString := CustomStringType("Test")
+
+	data := map[string]interface{}{
+		"data": map[string]interface{}{
+			"type": "customtypes",
+			"id":   "1",
+			"attributes": map[string]interface{}{
+				"int":        5,
+				"intptr":     5,
+				"intptrnull": nil,
+
+				"float":  1.5,
+				"string": "Test",
+			},
+		},
+	}
+	payload, err := json.Marshal(data)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Parse JSON API payload
+	customAttributeTypes := new(CustomAttributeTypes)
+	if err := UnmarshalPayload(bytes.NewReader(payload), customAttributeTypes); err != nil {
+		t.Fatal(err)
+	}
+
+	if expected, actual := customInt, customAttributeTypes.Int; expected != actual {
+		t.Fatalf("Was expecting custom int to be `%d`, got `%d`", expected, actual)
+	}
+	if expected, actual := customInt, *customAttributeTypes.IntPtr; expected != actual {
+		t.Fatalf("Was expecting custom int pointer to be `%d`, got `%d`", expected, actual)
+	}
+	if customAttributeTypes.IntPtrNull != nil {
+		t.Fatalf("Was expecting custom int pointer to be <nil>, got `%d`", customAttributeTypes.IntPtrNull)
+	}
+
+	if expected, actual := customFloat, customAttributeTypes.Float; expected != actual {
+		t.Fatalf("Was expecting custom float to be `%f`, got `%f`", expected, actual)
+	}
+	if expected, actual := customString, customAttributeTypes.String; expected != actual {
+		t.Fatalf("Was expecting custom string to be `%s`, got `%s`", expected, actual)
+	}
+}
+
+func TestUnmarshalCustomTypeAttributes_ErrInvalidType(t *testing.T) {
+	data := map[string]interface{}{
+		"data": map[string]interface{}{
+			"type": "customtypes",
+			"id":   "1",
+			"attributes": map[string]interface{}{
+				"int":        "bad",
+				"intptr":     5,
+				"intptrnull": nil,
+
+				"float":  1.5,
+				"string": "Test",
+			},
+		},
+	}
+	payload, err := json.Marshal(data)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Parse JSON API payload
+	customAttributeTypes := new(CustomAttributeTypes)
+	err = UnmarshalPayload(bytes.NewReader(payload), customAttributeTypes)
+	if err == nil {
+		t.Fatal("Expected an error unmarshalling the payload due to type mismatch, got none")
+	}
+
+	if err != ErrInvalidType {
+		t.Fatalf("Expected error to be %v, was %v", ErrInvalidType, err)
+	}
+}
+
 func samplePayloadWithoutIncluded() map[string]interface{} {
 	return map[string]interface{}{
 		"data": map[string]interface{}{
@@ -736,11 +990,6 @@ func samplePayloadWithoutIncluded() map[string]interface{} {
 	}
 }
 
-func payload(data map[string]interface{}) (result []byte, err error) {
-	result, err = json.Marshal(data)
-	return
-}
-
 func samplePayload() io.Reader {
 	payload := &OnePayload{
 		Data: &Node{
@@ -945,3 +1194,218 @@ func sampleSerializedEmbeddedTestModel() *Blog {
 
 	return blog
 }
+
+func TestUnmarshalNestedStructPtr(t *testing.T) {
+	type Director struct {
+		Firstname string `jsonapi:"attr,firstname"`
+		Surname   string `jsonapi:"attr,surname"`
+	}
+	type Movie struct {
+		ID       string    `jsonapi:"primary,movies"`
+		Name     string    `jsonapi:"attr,name"`
+		Director *Director `jsonapi:"attr,director"`
+	}
+	sample := map[string]interface{}{
+		"data": map[string]interface{}{
+			"type": "movies",
+			"id":   "123",
+			"attributes": map[string]interface{}{
+				"name": "The Shawshank Redemption",
+				"director": map[string]interface{}{
+					"firstname": "Frank",
+					"surname":   "Darabont",
+				},
+			},
+		},
+	}
+
+	data, err := json.Marshal(sample)
+	if err != nil {
+		t.Fatal(err)
+	}
+	in := bytes.NewReader(data)
+	out := new(Movie)
+
+	if err := UnmarshalPayload(in, out); err != nil {
+		t.Fatal(err)
+	}
+
+	if out.Name != "The Shawshank Redemption" {
+		t.Fatalf("expected out.Name to be `The Shawshank Redemption`, but got `%s`", out.Name)
+	}
+	if out.Director.Firstname != "Frank" {
+		t.Fatalf("expected out.Director.Firstname to be `Frank`, but got `%s`", out.Director.Firstname)
+	}
+	if out.Director.Surname != "Darabont" {
+		t.Fatalf("expected out.Director.Surname to be `Darabont`, but got `%s`", out.Director.Surname)
+	}
+}
+
+func TestUnmarshalNestedStruct(t *testing.T) {
+	boss := map[string]interface{}{
+		"firstname": "Hubert",
+		"surname":   "Farnsworth",
+		"age":       176,
+		"hired-at":  "2016-08-17T08:27:12Z",
+	}
+
+	sample := map[string]interface{}{
+		"data": map[string]interface{}{
+			"type": "companies",
+			"id":   "123",
+			"attributes": map[string]interface{}{
+				"name":       "Planet Express",
+				"boss":       boss,
+				"founded-at": "2016-08-17T08:27:12Z",
+				"teams": []map[string]interface{}{
+					map[string]interface{}{
+						"name": "Dev",
+						"members": []map[string]interface{}{
+							map[string]interface{}{"firstname": "Sean"},
+							map[string]interface{}{"firstname": "Iz"},
+						},
+						"leader": map[string]interface{}{"firstname": "Iz"},
+					},
+					map[string]interface{}{
+						"name": "DxE",
+						"members": []map[string]interface{}{
+							map[string]interface{}{"firstname": "Akshay"},
+							map[string]interface{}{"firstname": "Peri"},
+						},
+						"leader": map[string]interface{}{"firstname": "Peri"},
+					},
+				},
+			},
+		},
+	}
+
+	data, err := json.Marshal(sample)
+	if err != nil {
+		t.Fatal(err)
+	}
+	in := bytes.NewReader(data)
+	out := new(Company)
+
+	if err := UnmarshalPayload(in, out); err != nil {
+		t.Fatal(err)
+	}
+
+	if out.Boss.Firstname != "Hubert" {
+		t.Fatalf("expected `Hubert` at out.Boss.Firstname, but got `%s`", out.Boss.Firstname)
+	}
+
+	if out.Boss.Age != 176 {
+		t.Fatalf("expected `176` at out.Boss.Age, but got `%d`", out.Boss.Age)
+	}
+
+	if out.Boss.HiredAt.IsZero() {
+		t.Fatalf("expected out.Boss.HiredAt to be zero, but got `%t`", out.Boss.HiredAt.IsZero())
+	}
+
+	if len(out.Teams) != 2 {
+		t.Fatalf("expected len(out.Teams) to be 2, but got `%d`", len(out.Teams))
+	}
+
+	if out.Teams[0].Name != "Dev" {
+		t.Fatalf("expected out.Teams[0].Name to be `Dev`, but got `%s`", out.Teams[0].Name)
+	}
+
+	if out.Teams[1].Name != "DxE" {
+		t.Fatalf("expected out.Teams[1].Name to be `DxE`, but got `%s`", out.Teams[1].Name)
+	}
+
+	if len(out.Teams[0].Members) != 2 {
+		t.Fatalf("expected len(out.Teams[0].Members) to be 2, but got `%d`", len(out.Teams[0].Members))
+	}
+
+	if len(out.Teams[1].Members) != 2 {
+		t.Fatalf("expected len(out.Teams[1].Members) to be 2, but got `%d`", len(out.Teams[1].Members))
+	}
+
+	if out.Teams[0].Members[0].Firstname != "Sean" {
+		t.Fatalf("expected out.Teams[0].Members[0].Firstname to be `Sean`, but got `%s`", out.Teams[0].Members[0].Firstname)
+	}
+
+	if out.Teams[0].Members[1].Firstname != "Iz" {
+		t.Fatalf("expected out.Teams[0].Members[1].Firstname to be `Iz`, but got `%s`", out.Teams[0].Members[1].Firstname)
+	}
+
+	if out.Teams[1].Members[0].Firstname != "Akshay" {
+		t.Fatalf("expected out.Teams[1].Members[0].Firstname to be `Akshay`, but got `%s`", out.Teams[1].Members[0].Firstname)
+	}
+
+	if out.Teams[1].Members[1].Firstname != "Peri" {
+		t.Fatalf("expected out.Teams[1].Members[1].Firstname to be `Peri`, but got `%s`", out.Teams[1].Members[1].Firstname)
+	}
+
+	if out.Teams[0].Leader.Firstname != "Iz" {
+		t.Fatalf("expected out.Teams[0].Leader.Firstname to be `Iz`, but got `%s`", out.Teams[0].Leader.Firstname)
+	}
+
+	if out.Teams[1].Leader.Firstname != "Peri" {
+		t.Fatalf("expected out.Teams[1].Leader.Firstname to be `Peri`, but got `%s`", out.Teams[1].Leader.Firstname)
+	}
+}
+
+func TestUnmarshalNestedStructSlice(t *testing.T) {
+
+	fry := map[string]interface{}{
+		"firstname": "Philip J.",
+		"surname":   "Fry",
+		"age":       25,
+		"hired-at":  "2016-08-17T08:27:12Z",
+	}
+
+	bender := map[string]interface{}{
+		"firstname": "Bender Bending",
+		"surname":   "Rodriguez",
+		"age":       19,
+		"hired-at":  "2016-08-17T08:27:12Z",
+	}
+
+	deliveryCrew := map[string]interface{}{
+		"name": "Delivery Crew",
+		"members": []interface{}{
+			fry,
+			bender,
+		},
+	}
+
+	sample := map[string]interface{}{
+		"data": map[string]interface{}{
+			"type": "companies",
+			"id":   "123",
+			"attributes": map[string]interface{}{
+				"name": "Planet Express",
+				"teams": []interface{}{
+					deliveryCrew,
+				},
+			},
+		},
+	}
+
+	data, err := json.Marshal(sample)
+	if err != nil {
+		t.Fatal(err)
+	}
+	in := bytes.NewReader(data)
+	out := new(Company)
+
+	if err := UnmarshalPayload(in, out); err != nil {
+		t.Fatal(err)
+	}
+
+	if out.Teams[0].Name != "Delivery Crew" {
+		t.Fatalf("Nested struct not unmarshalled: Expected `Delivery Crew` but got `%s`", out.Teams[0].Name)
+	}
+
+	if len(out.Teams[0].Members) != 2 {
+		t.Fatalf("Nested struct not unmarshalled: Expected to have `2` Members but got `%d`",
+			len(out.Teams[0].Members))
+	}
+
+	if out.Teams[0].Members[0].Firstname != "Philip J." {
+		t.Fatalf("Nested struct not unmarshalled: Expected `Philip J.` but got `%s`",
+			out.Teams[0].Members[0].Firstname)
+	}
+}

response.go

@@ -68,10 +68,7 @@ func MarshalPayload(w io.Writer, models interface{}) error {
 		return err
 	}
 
-	if err := json.NewEncoder(w).Encode(payload); err != nil {
+	return json.NewEncoder(w).Encode(payload)
-		return err
-	}
-	return nil
 }
 
 // Marshal does the same as MarshalPayload except it just returns the payload
@@ -128,10 +125,7 @@ func MarshalPayloadWithoutIncluded(w io.Writer, model interface{}) error {
 	}
 	payload.clearIncluded()
 
-	if err := json.NewEncoder(w).Encode(payload); err != nil {
+	return json.NewEncoder(w).Encode(payload)
-		return err
-	}
-	return nil
 }
 
 // marshalOne does the same as MarshalOnePayload except it just returns the
@@ -195,11 +189,7 @@ func MarshalOnePayloadEmbedded(w io.Writer, model interface{}) error {
 
 	payload := &OnePayload{Data: rootNode}
 
-	if err := json.NewEncoder(w).Encode(payload); err != nil {
+	return json.NewEncoder(w).Encode(payload)
-		return err
-	}
-
-	return nil
 }
 
 func visitModelNode(model interface{}, included *map[string]*Node,
@@ -207,9 +197,20 @@ func visitModelNode(model interface{}, included *map[string]*Node,
 	node := new(Node)
 
 	var er error
+	value := reflect.ValueOf(model)
+	if value.Kind() == reflect.Ptr && value.IsNil() {
+		return nil, nil
+	}
 
-	modelValue := reflect.ValueOf(model).Elem()
+	var modelValue reflect.Value
-	modelType := reflect.ValueOf(model).Type().Elem()
+	var modelType reflect.Type
+	if value.Kind() == reflect.Ptr {
+		modelValue = value.Elem()
+		modelType = value.Type().Elem()
+	} else {
+		modelValue = value
+		modelType = value.Type()
+	}
 
 	for i := 0; i < modelValue.NumField(); i++ {
 		structField := modelValue.Type().Field(i)
@@ -276,6 +277,9 @@ func visitModelNode(model interface{}, included *map[string]*Node,
 				// We had a JSON float (numeric), but our field was not one of the
 				// allowed numeric types
 				er = ErrBadJSONAPIID
+			}
+
+			if er != nil {
 				break
 			}
 
@@ -286,7 +290,7 @@ func visitModelNode(model interface{}, included *map[string]*Node,
 				node.ClientID = clientID
 			}
 		} else if annotation == annotationAttribute {
-			var omitEmpty, iso8601 bool
+			var omitEmpty, iso8601, rfc3339 bool
 
 			if len(args) > 2 {
 				for _, arg := range args[2:] {
@@ -295,6 +299,8 @@ func visitModelNode(model interface{}, included *map[string]*Node,
 						omitEmpty = true
 					case annotationISO8601:
 						iso8601 = true
+					case annotationRFC3339:
+						rfc3339 = true
 					}
 				}
 			}
@@ -312,6 +318,8 @@ func visitModelNode(model interface{}, included *map[string]*Node,
 
 				if iso8601 {
 					node.Attributes[args[1]] = t.UTC().Format(iso8601TimeFormat)
+				} else if rfc3339 {
+					node.Attributes[args[1]] = t.UTC().Format(time.RFC3339)
 				} else {
 					node.Attributes[args[1]] = t.Unix()
 				}
@@ -332,6 +340,8 @@ func visitModelNode(model interface{}, included *map[string]*Node,
 
 					if iso8601 {
 						node.Attributes[args[1]] = tm.UTC().Format(iso8601TimeFormat)
+					} else if rfc3339 {
+						node.Attributes[args[1]] = tm.UTC().Format(time.RFC3339)
 					} else {
 						node.Attributes[args[1]] = tm.Unix()
 					}

response_test.go

@@ -3,6 +3,7 @@ package jsonapi
 import (
 	"bytes"
 	"encoding/json"
+	"fmt"
 	"reflect"
 	"sort"
 	"testing"
@@ -37,6 +38,35 @@ func TestMarshalPayload(t *testing.T) {
 	}
 }
 
+func TestMarshalPayloadWithNulls(t *testing.T) {
+
+	books := []*Book{nil, {ID: 101}, nil}
+	var jsonData map[string]interface{}
+
+	out := bytes.NewBuffer(nil)
+	if err := MarshalPayload(out, books); err != nil {
+		t.Fatal(err)
+	}
+
+	if err := json.Unmarshal(out.Bytes(), &jsonData); err != nil {
+		t.Fatal(err)
+	}
+	raw, ok := jsonData["data"]
+	if !ok {
+		t.Fatalf("data key does not exist")
+	}
+	arr, ok := raw.([]interface{})
+	if !ok {
+		t.Fatalf("data is not an Array")
+	}
+	for i := 0; i < len(arr); i++ {
+		if books[i] == nil && arr[i] != nil ||
+			books[i] != nil && arr[i] == nil {
+			t.Fatalf("restored data is not equal to source")
+		}
+	}
+}
+
 func TestMarshal_attrStringSlice(t *testing.T) {
 	tags := []string{"fiction", "sale"}
 	b := &Book{ID: 1, Tags: tags}
@@ -441,58 +471,113 @@ func TestOmitsZeroTimes(t *testing.T) {
 	}
 }
 
-func TestMarshalISO8601Time(t *testing.T) {
+func TestMarshal_Times(t *testing.T) {
-	testModel := &Timestamp{
+	aTime := time.Date(2016, 8, 17, 8, 27, 12, 23849, time.UTC)
+
+	for _, tc := range []struct {
+		desc         string
+		input        *TimestampModel
+		verification func(data map[string]interface{}) error
+	}{
+		{
+			desc: "default_byValue",
+			input: &TimestampModel{
 				ID:       5,
-		Time: time.Date(2016, 8, 17, 8, 27, 12, 23849, time.UTC),
+				DefaultV: aTime,
+			},
+			verification: func(root map[string]interface{}) error {
+				v := root["data"].(map[string]interface{})["attributes"].(map[string]interface{})["defaultv"].(float64)
+				if got, want := int64(v), aTime.Unix(); got != want {
+					return fmt.Errorf("got %v, want %v", got, want)
 				}
-
+				return nil
-	out := bytes.NewBuffer(nil)
+			},
-	if err := MarshalPayload(out, testModel); err != nil {
+		},
-		t.Fatal(err)
+		{
-	}
+			desc: "default_byPointer",
-
+			input: &TimestampModel{
-	resp := new(OnePayload)
-	if err := json.NewDecoder(out).Decode(resp); err != nil {
-		t.Fatal(err)
-	}
-
-	data := resp.Data
-
-	if data.Attributes == nil {
-		t.Fatalf("Expected attributes")
-	}
-
-	if data.Attributes["timestamp"] != "2016-08-17T08:27:12Z" {
-		t.Fatal("Timestamp was not serialised into ISO8601 correctly")
-	}
-}
-
-func TestMarshalISO8601TimePointer(t *testing.T) {
-	tm := time.Date(2016, 8, 17, 8, 27, 12, 23849, time.UTC)
-	testModel := &Timestamp{
 				ID:       5,
-		Next: &tm,
+				DefaultP: &aTime,
+			},
+			verification: func(root map[string]interface{}) error {
+				v := root["data"].(map[string]interface{})["attributes"].(map[string]interface{})["defaultp"].(float64)
+				if got, want := int64(v), aTime.Unix(); got != want {
+					return fmt.Errorf("got %v, want %v", got, want)
 				}
-
+				return nil
+			},
+		},
+		{
+			desc: "iso8601_byValue",
+			input: &TimestampModel{
+				ID:       5,
+				ISO8601V: aTime,
+			},
+			verification: func(root map[string]interface{}) error {
+				v := root["data"].(map[string]interface{})["attributes"].(map[string]interface{})["iso8601v"].(string)
+				if got, want := v, aTime.UTC().Format(iso8601TimeFormat); got != want {
+					return fmt.Errorf("got %v, want %v", got, want)
+				}
+				return nil
+			},
+		},
+		{
+			desc: "iso8601_byPointer",
+			input: &TimestampModel{
+				ID:       5,
+				ISO8601P: &aTime,
+			},
+			verification: func(root map[string]interface{}) error {
+				v := root["data"].(map[string]interface{})["attributes"].(map[string]interface{})["iso8601p"].(string)
+				if got, want := v, aTime.UTC().Format(iso8601TimeFormat); got != want {
+					return fmt.Errorf("got %v, want %v", got, want)
+				}
+				return nil
+			},
+		},
+		{
+			desc: "rfc3339_byValue",
+			input: &TimestampModel{
+				ID:       5,
+				RFC3339V: aTime,
+			},
+			verification: func(root map[string]interface{}) error {
+				v := root["data"].(map[string]interface{})["attributes"].(map[string]interface{})["rfc3339v"].(string)
+				if got, want := v, aTime.UTC().Format(time.RFC3339); got != want {
+					return fmt.Errorf("got %v, want %v", got, want)
+				}
+				return nil
+			},
+		},
+		{
+			desc: "rfc3339_byPointer",
+			input: &TimestampModel{
+				ID:       5,
+				RFC3339P: &aTime,
+			},
+			verification: func(root map[string]interface{}) error {
+				v := root["data"].(map[string]interface{})["attributes"].(map[string]interface{})["rfc3339p"].(string)
+				if got, want := v, aTime.UTC().Format(time.RFC3339); got != want {
+					return fmt.Errorf("got %v, want %v", got, want)
+				}
+				return nil
+			},
+		},
+	} {
+		t.Run(tc.desc, func(t *testing.T) {
 			out := bytes.NewBuffer(nil)
-	if err := MarshalPayload(out, testModel); err != nil {
+			if err := MarshalPayload(out, tc.input); err != nil {
 				t.Fatal(err)
 			}
-
+			// Use the standard JSON library to traverse the genereated JSON payload.
-	resp := new(OnePayload)
+			data := map[string]interface{}{}
-	if err := json.NewDecoder(out).Decode(resp); err != nil {
+			json.Unmarshal(out.Bytes(), &data)
+			if tc.verification != nil {
+				if err := tc.verification(data); err != nil {
 					t.Fatal(err)
 				}
-
-	data := resp.Data
-
-	if data.Attributes == nil {
-		t.Fatalf("Expected attributes")
 			}
-
+		})
-	if data.Attributes["next"] != "2016-08-17T08:27:12Z" {
-		t.Fatal("Next was not serialised into ISO8601 correctly")
 	}
 }
 

runtime.go

@@ -1,103 +0,0 @@
-package jsonapi
-
-import (
-	"crypto/rand"
-	"fmt"
-	"io"
-	"reflect"
-	"time"
-)
-
-type Event int
-
-const (
-	UnmarshalStart Event = iota
-	UnmarshalStop
-	MarshalStart
-	MarshalStop
-)
-
-type Runtime struct {
-	ctx map[string]interface{}
-}
-
-type Events func(*Runtime, Event, string, time.Duration)
-
-var Instrumentation Events
-
-func NewRuntime() *Runtime { return &Runtime{make(map[string]interface{})} }
-
-func (r *Runtime) WithValue(key string, value interface{}) *Runtime {
-	r.ctx[key] = value
-
-	return r
-}
-
-func (r *Runtime) Value(key string) interface{} {
-	return r.ctx[key]
-}
-
-func (r *Runtime) Instrument(key string) *Runtime {
-	return r.WithValue("instrument", key)
-}
-
-func (r *Runtime) shouldInstrument() bool {
-	return Instrumentation != nil
-}
-
-func (r *Runtime) UnmarshalPayload(reader io.Reader, model interface{}) error {
-	return r.instrumentCall(UnmarshalStart, UnmarshalStop, func() error {
-		return UnmarshalPayload(reader, model)
-	})
-}
-
-func (r *Runtime) UnmarshalManyPayload(reader io.Reader, kind reflect.Type) (elems []interface{}, err error) {
-	r.instrumentCall(UnmarshalStart, UnmarshalStop, func() error {
-		elems, err = UnmarshalManyPayload(reader, kind)
-		return err
-	})
-
-	return
-}
-
-func (r *Runtime) MarshalPayload(w io.Writer, model interface{}) error {
-	return r.instrumentCall(MarshalStart, MarshalStop, func() error {
-		return MarshalPayload(w, model)
-	})
-}
-
-func (r *Runtime) instrumentCall(start Event, stop Event, c func() error) error {
-	if !r.shouldInstrument() {
-		return c()
-	}
-
-	instrumentationGUID, err := newUUID()
-	if err != nil {
-		return err
-	}
-
-	begin := time.Now()
-	Instrumentation(r, start, instrumentationGUID, time.Duration(0))
-
-	if err := c(); err != nil {
-		return err
-	}
-
-	diff := time.Duration(time.Now().UnixNano() - begin.UnixNano())
-	Instrumentation(r, stop, instrumentationGUID, diff)
-
-	return nil
-}
-
-// citation: http://play.golang.org/p/4FkNSiUDMg
-func newUUID() (string, error) {
-	uuid := make([]byte, 16)
-	if _, err := io.ReadFull(rand.Reader, uuid); err != nil {
-		return "", err
-	}
-	// variant bits; see section 4.1.1
-	uuid[8] = uuid[8]&^0xc0 | 0x80
-	// version 4 (pseudo-random); see section 4.1.3
-	uuid[6] = uuid[6]&^0xf0 | 0x40
-	return fmt.Sprintf("%x-%x-%x-%x-%x", uuid[0:4], uuid[4:6], uuid[6:8], uuid[8:10], uuid[10:]), nil
-}