Merge pull request #14 from cihangir/fields

Structs: added Fields() method into Field struct for listing all the Fie...

field.go

@@ -85,6 +85,18 @@ func (f *Field) Set(val interface{}) error {
 	return nil
 }
 
+// Fields returns a slice of Fields. This is particular handy to get the fields
+// of a nested struct . A struct tag with the content of "-" ignores the
+// checking of that particular field. Example:
+//
+//   // Field is ignored by this package.
+//   Field *http.Request `structs:"-"`
+//
+// It panics if field is not exported or if field's kind is not struct
+func (f *Field) Fields() []*Field {
+	return getFields(f.value)
+}
+
 // Field returns the field from a nested struct. It panics if the nested struct
 // is not exported or if the field was not found.
 func (f *Field) Field(name string) *Field {

field_test.go

@@ -257,6 +257,15 @@ func TestField_Field(t *testing.T) {
 	_ = s.Field("Bar").Field("e")
 }
 
+func TestField_Fields(t *testing.T) {
+	s := newStruct()
+	fields := s.Field("Bar").Fields()
+
+	if len(fields) != 3 {
+		t.Errorf("We expect 3 fields in embedded struct, was: %d", len(fields))
+	}
+}
+
 func TestField_FieldOk(t *testing.T) {
 	s := newStruct()
 

structs.go

@@ -128,7 +128,15 @@ func (s *Struct) Values() []interface{} {
 //
 // It panics if s's kind is not struct.
 func (s *Struct) Fields() []*Field {
-	t := s.value.Type()
+	return getFields(s.value)
+}
+
+func getFields(v reflect.Value) []*Field {
+	if v.Kind() == reflect.Ptr {
+		v = v.Elem()
+	}
+
+	t := v.Type()
 
 	var fields []*Field
 
@@ -141,7 +149,7 @@ func (s *Struct) Fields() []*Field {
 
 		f := &Field{
 			field: field,
-			value: s.value.FieldByName(field.Name),
+			value: v.FieldByName(field.Name),
 		}
 
 		fields = append(fields, f)