Added support for int64 and uint64 primary id types

response.go

@@ -178,17 +178,18 @@ func visitModelNode(model interface{}, included *map[string]*Node, sideload bool
 		if annotation == "primary" {
 			id := fieldValue.Interface()
 
-			str, ok := id.(string)
+			switch nId := id.(type) {
-			if ok {
+			case string:
-				node.Id = str
+				node.Id = nId
-			} else {
+			case int:
-				j, ok := id.(int)
+				node.Id = strconv.Itoa(nId)
-				if ok {
+			case int64:
-					node.Id = strconv.Itoa(j)
+				node.Id = strconv.FormatInt(nId, 10)
-				} else {
+			case uint64:
-					er = ErrBadJSONAPIID
+				node.Id = strconv.FormatUint(nId, 10)
-					break
+			default:
-				}
+				er = ErrBadJSONAPIID
+				break
 			}
 
 			node.Type = args[1]