Support poiner of Scanner

main_test.go

@@ -232,7 +232,9 @@ func TestSqlNullValue(t *testing.T) {
 	DB.DropTable(&NullValue{})
 	DB.AutoMigrate(&NullValue{})
 
-	if err := DB.Save(&NullValue{Name: sql.NullString{String: "hello", Valid: true},
+	if err := DB.Save(&NullValue{
+		Name:    sql.NullString{String: "hello", Valid: true},
+		Gender:  &sql.NullString{String: "M", Valid: true},
 		Age:     sql.NullInt64{Int64: 18, Valid: true},
 		Male:    sql.NullBool{Bool: true, Valid: true},
 		Height:  sql.NullFloat64{Float64: 100.11, Valid: true},
@@ -244,11 +246,13 @@ func TestSqlNullValue(t *testing.T) {
 	var nv NullValue
 	DB.First(&nv, "name = ?", "hello")
 
-	if nv.Name.String != "hello" || nv.Age.Int64 != 18 || nv.Male.Bool != true || nv.Height.Float64 != 100.11 || nv.AddedAt.Valid != true {
+	if nv.Name.String != "hello" || nv.Gender.String != "M" || nv.Age.Int64 != 18 || nv.Male.Bool != true || nv.Height.Float64 != 100.11 || nv.AddedAt.Valid != true {
 		t.Errorf("Should be able to fetch null value")
 	}
 
-	if err := DB.Save(&NullValue{Name: sql.NullString{String: "hello-2", Valid: true},
+	if err := DB.Save(&NullValue{
+		Name:    sql.NullString{String: "hello-2", Valid: true},
+		Gender:  &sql.NullString{String: "F", Valid: true},
 		Age:     sql.NullInt64{Int64: 18, Valid: false},
 		Male:    sql.NullBool{Bool: true, Valid: true},
 		Height:  sql.NullFloat64{Float64: 100.11, Valid: true},
@@ -259,11 +263,13 @@ func TestSqlNullValue(t *testing.T) {
 
 	var nv2 NullValue
 	DB.First(&nv2, "name = ?", "hello-2")
-	if nv2.Name.String != "hello-2" || nv2.Age.Int64 != 0 || nv2.Male.Bool != true || nv2.Height.Float64 != 100.11 || nv2.AddedAt.Valid != false {
+	if nv2.Name.String != "hello-2" || nv2.Gender.String != "F" || nv2.Age.Int64 != 0 || nv2.Male.Bool != true || nv2.Height.Float64 != 100.11 || nv2.AddedAt.Valid != false {
 		t.Errorf("Should be able to fetch null value")
 	}
 
-	if err := DB.Save(&NullValue{Name: sql.NullString{String: "hello-3", Valid: false},
+	if err := DB.Save(&NullValue{
+		Name:    sql.NullString{String: "hello-3", Valid: false},
+		Gender:  &sql.NullString{String: "M", Valid: true},
 		Age:     sql.NullInt64{Int64: 18, Valid: false},
 		Male:    sql.NullBool{Bool: true, Valid: true},
 		Height:  sql.NullFloat64{Float64: 100.11, Valid: true},

model_struct.go

@@ -166,16 +166,18 @@ func (scope *Scope) GetModelStruct() *ModelStruct {
 					field.HasDefaultValue = true
 				}
 
-				fieldValue := reflect.New(fieldStruct.Type).Interface()
+				indirectType := fieldStruct.Type
+				for indirectType.Kind() == reflect.Ptr {
+					indirectType = indirectType.Elem()
+				}
+
+				fieldValue := reflect.New(indirectType).Interface()
 				if _, isScanner := fieldValue.(sql.Scanner); isScanner {
 					// is scanner
 					field.IsScanner, field.IsNormal = true, true
 				} else if _, isTime := fieldValue.(*time.Time); isTime {
 					// is time
 					field.IsNormal = true
-				} else if _, isTime := fieldValue.(**time.Time); isTime {
-					// is time
-					field.IsNormal = true
 				} else if _, ok := field.TagSettings["EMBEDDED"]; ok || fieldStruct.Anonymous {
 					// is embedded struct
 					for _, subField := range scope.New(fieldValue).GetStructFields() {
@@ -189,11 +191,6 @@ func (scope *Scope) GetModelStruct() *ModelStruct {
 					continue
 				} else {
 					// build relationships
-					indirectType := fieldStruct.Type
-					for indirectType.Kind() == reflect.Ptr {
-						indirectType = indirectType.Elem()
-					}
-
 					switch indirectType.Kind() {
 					case reflect.Slice:
 						defer func(field *StructField) {

structs_test.go

@@ -169,6 +169,7 @@ type Comment struct {
 type NullValue struct {
 	Id      int64
 	Name    sql.NullString  `sql:"not null"`
+	Gender  *sql.NullString `sql:"not null"`
 	Age     sql.NullInt64
 	Male    sql.NullBool
 	Height  sql.NullFloat64