isZero

structs/options.go

@@ -41,9 +41,7 @@ func DeepCopy() optionFunc {
 }
 
 func SkipField(field string) optionFunc {
-	return func(o *option) {
-		o.SkipFields = append(o.SkipFields, field)
-	}
+	return SkipFields([]string{field})
 }
 
 func SkipFields(fields []string) optionFunc {

structs/struct_test.go

@@ -5,7 +5,7 @@ import (
 	"testing"
 
 	"github.com/charlienet/go-mixed/structs"
-	"github.com/go-playground/assert/v2"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestNew(t *testing.T) {
@@ -19,3 +19,22 @@ func TestNew(t *testing.T) {
 	t.Log(s.Names())
 	t.Log(s.Values())
 }
+
+func TestIsZero(t *testing.T) {
+	var v1 int
+	assert.True(t, structs.IsZero(v1))
+
+	var v2 = struct {
+		Msg string
+	}{}
+	assert.True(t, structs.IsZero(v2))
+
+	var v3 = struct {
+		VV  int
+		Msg string
+	}{Msg: "abc"}
+	assert.False(t, structs.IsZero(v3))
+
+	v3.Msg = ""
+	assert.True(t, structs.IsZero(v3))
+}

structs/structs.go

@@ -53,6 +53,17 @@ func (s *Struct) Values() []any {
 	return values
 }
 
+func (s *Struct) IsZero() bool {
+	for _, fi := range s.fields {
+		source := s.value.FieldByName(fi.name)
+		if !source.IsZero() {
+			return false
+		}
+	}
+
+	return true
+}
+
 func (s *Struct) ToMap() map[string]any {
 	m := make(map[string]any, len(s.fields))
 	for _, fi := range s.fields {
@@ -112,6 +123,16 @@ func Map2Struct(o map[string]any, dst any) {
 
 }
 
+func IsZero(o any) bool {
+	v := reflect.ValueOf(o)
+	if v.IsZero() {
+		return true
+	}
+
+	s := New(o)
+	return s.IsZero()
+}
+
 func Struct2Map(o any, opts ...optionFunc) map[string]any {
 	return New(o, opts...).ToMap()
 }