Add postgres create returning all serial type columns support

callback_create.go

@@ -162,7 +162,18 @@ func createCallback(scope *Scope) {
 
 		// execute create sql: dialects with additional lastInsertID requirements (currently postgres & mssql)
 		if primaryField.Field.CanAddr() {
-			if err := scope.SQLDB().QueryRow(scope.SQL, scope.SQLVars...).Scan(primaryField.Field.Addr().Interface()); scope.Err(err) == nil {
+			dest := []interface{}{primaryField.Field.Addr().Interface()}
+			if scope.Dialect().GetName() == "postgres" {
+				for _, field := range scope.Fields() {
+					typ, ok := field.TagSettingsGet("TYPE")
+					if ok && typ == "serial" && field.Field.CanAddr() {
+						dest = append(dest, field.Field.Addr().Interface())
+						scope.SQL += fmt.Sprintf(", %s.%s", quotedTableName, scope.Quote(field.DBName))
+					}
+				}
+			}
+
+			if err := scope.SQLDB().QueryRow(scope.SQL, scope.SQLVars...).Scan(dest...); scope.Err(err) == nil {
 				primaryField.IsBlank = false
 				scope.db.RowsAffected = 1
 			}

create_test.go

@@ -286,3 +286,37 @@ func TestCreateIgnore(t *testing.T) {
 		t.Error("Should ignore duplicate user insert by insert modifier:IGNORE ")
 	}
 }
+
+func TestPostgresReturningMultipleColumns(t *testing.T) {
+	type ReturningMultipleColumns struct {
+		ID      uint `gorm:"primary_key"`
+		SerialA int  `gorm:"type:serial;not null"`
+		SerialB int  `gorm:"type:serial;not null"`
+		SerialC int  `gorm:"type:serial;not null"`
+	}
+
+	DB.LogMode(true)
+
+	err := DB.AutoMigrate(&ReturningMultipleColumns{}).Error
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	record := ReturningMultipleColumns{}
+	err = DB.Omit("serial_a", "serial_b", "serial_c").Create(&record).Error
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if record.SerialA == 0 {
+		t.Error("SerialA should not be 0")
+	}
+
+	if record.SerialB == 0 {
+		t.Error("SerialB should not be 0")
+	}
+
+	if record.SerialC == 0 {
+		t.Error("SerialC should not be 0")
+	}
+}