fix: empty serilizer err #5524

schema/field.go

@@ -472,9 +472,6 @@ func (field *Field) setupValuerAndSetter() {
 		oldValuerOf := field.ValueOf
 		field.ValueOf = func(ctx context.Context, v reflect.Value) (interface{}, bool) {
 			value, zero := oldValuerOf(ctx, v)
-			if zero {
-				return value, zero
-			}
 
 			s, ok := value.(SerializerValuerInterface)
 			if !ok {
@@ -487,7 +484,7 @@ func (field *Field) setupValuerAndSetter() {
 				Destination:     v,
 				Context:         ctx,
 				fieldValue:      value,
-			}, false
+			}, zero
 		}
 	}
 

schema/serializer.go

@@ -121,7 +121,11 @@ func (UnixSecondSerializer) Scan(ctx context.Context, field *Field, dst reflect.
 func (UnixSecondSerializer) Value(ctx context.Context, field *Field, dst reflect.Value, fieldValue interface{}) (result interface{}, err error) {
 	switch v := fieldValue.(type) {
 	case int64, int, uint, uint64, int32, uint32, int16, uint16, *int64, *int, *uint, *uint64, *int32, *uint32, *int16, *uint16:
-		result = time.Unix(reflect.Indirect(reflect.ValueOf(v)).Int(), 0)
+		rv := reflect.ValueOf(v)
+		if rv.IsZero() {
+			return time.Unix(0, 0), nil
+		}
+		result = time.Unix(reflect.Indirect(rv).Int(), 0)
 	default:
 		err = fmt.Errorf("invalid field type %#v for UnixSecondSerializer, only int, uint supported", v)
 	}

tests/go.mod

@@ -3,7 +3,6 @@ module gorm.io/gorm/tests
 go 1.14
 
 require (
-	github.com/denisenkom/go-mssqldb v0.12.2 // indirect
 	github.com/golang-sql/civil v0.0.0-20220223132316-b832511892a9 // indirect
 	github.com/google/uuid v1.3.0
 	github.com/jinzhu/now v1.1.5

tests/serializer_test.go

@@ -103,6 +103,48 @@ func TestSerializer(t *testing.T) {
 		CustomSerializerString: "world",
 	}
 
+	data.JobInfo = Job{}
+	if err := DB.Create(&data).Error; err != nil {
+		t.Fatalf("failed to create data, got error %v", err)
+	}
+
+	var result SerializerStruct
+	if err := DB.First(&result, data.ID).Error; err != nil {
+		t.Fatalf("failed to query data, got error %v", err)
+	}
+
+	AssertEqual(t, result, data)
+
+	if err := DB.Model(&result).Update("roles", "").Error; err != nil {
+		t.Fatalf("failed to update data's roles, got error %v", err)
+	}
+
+	if err := DB.First(&result, data.ID).Error; err != nil {
+		t.Fatalf("failed to query data, got error %v", err)
+	}
+}
+
+func TestSerializerZeroValue(t *testing.T) {
+	schema.RegisterSerializer("custom", NewCustomSerializer("hello"))
+	DB.Migrator().DropTable(&SerializerStruct{})
+	if err := DB.Migrator().AutoMigrate(&SerializerStruct{}); err != nil {
+		t.Fatalf("no error should happen when migrate scanner, valuer struct, got error %v", err)
+	}
+
+	createdAt := time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC)
+	updatedAt := createdAt.Unix()
+
+	data := SerializerStruct{
+		Name:                   []byte("jinzhu"),
+		Roles:                  []string{"r1", "r2"},
+		Contracts:              map[string]interface{}{"name": "jinzhu", "age": 10},
+		EncryptedString:        EncryptedString("pass"),
+		CreatedTime:            createdAt.Unix(),
+		UpdatedTime:            &updatedAt,
+		JobInfo:                Job{},
+		CustomSerializerString: "world",
+	}
+
 	if err := DB.Create(&data).Error; err != nil {
 		t.Fatalf("failed to create data, got error %v", err)
 	}