Solution for #13

.drone.yml

@@ -7,12 +7,12 @@ steps:
     image: golang:1.13
     commands:
       - go test -v -bench=. ./...
-      
+
   - name: coverage
     image: golang:1.13
     commands:
       - go get github.com/mattn/goveralls
-      - goveralls -v -service drone.io    
+      - goveralls -v -service drone.io
     environment:
       COVERALLS_TOKEN:
         from_secret: COVERALLS_TOKEN

v2/go.mod

@@ -1,3 +1,5 @@
 module github.com/guiferpa/gody/v2
 
 go 1.13
+
+require github.com/guiferpa/gody v1.1.0

v2/go.sum

@@ -0,0 +1,2 @@
+github.com/guiferpa/gody v1.1.0 h1:Z27J1+7zEHt3JRpa09MemaOIiJlpxqOCEMdo8r+y5Vc=
+github.com/guiferpa/gody v1.1.0/go.mod h1:YTFw2BBAids7PWNjJ9L45y4+QJAx0jl2W0q58B1YndI=

v2/serialize.go

@@ -94,6 +94,9 @@ func RawSerialize(tn string, b interface{}) ([]Field, error) {
 
 		fieldValue := valueOf.FieldByName(field.Name)
 		fieldNameToLower := strings.ToLower(field.Name)
+		if fieldNameFromJSONTag := field.Tag.Get("json"); fieldNameFromJSONTag != "" {
+			fieldNameToLower = fieldNameFromJSONTag
+		}
 		if kindOfField := field.Type.Kind(); kindOfField == reflect.Struct {
 			if fieldConverted := fieldValue.Convert(fieldValue.Type()); fieldConverted.CanInterface() {
 				payload := fieldConverted.Interface()

v2/serialize_test.go

@@ -181,6 +181,29 @@ func TestRawSerializeWithEmptyTagName(t *testing.T) {
 	}
 }
 
+type TestStructJSON struct {
+	A string `validate:"not_empty" json:"b"`
+}
+
+func TestRawSerializeWithJSONTagName(t *testing.T) {
+	body := struct {
+		A string `json:"b" validate:"not_empty"`
+	}{}
+
+	fields, err := RawSerialize("validate", body)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	field := fields[0]
+
+	if got, want := field.Name, "b"; got != want {
+		t.Errorf("Unexpected field name, got: %s, want: %s", got, want)
+		return
+	}
+}
+
 func BenchmarkSerializeBodyStruct(b *testing.B) {
 	b.ResetTimer()
 	body := map[string]string{"test-key": "test-value"}