forked from mirror/gorm
112 lines
3.9 KiB
Go
112 lines
3.9 KiB
Go
package gorm
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import (
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"fmt"
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"strings"
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)
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// Define callbacks for updating
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func init() {
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defaultCallback.Update().Register("gorm:assign_updating_attributes", assignUpdatingAttributesCallback)
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defaultCallback.Update().Register("gorm:begin_transaction", beginTransactionCallback)
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defaultCallback.Update().Register("gorm:before_update", beforeUpdateCallback)
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defaultCallback.Update().Register("gorm:save_before_associations", saveBeforeAssociationsCallback)
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defaultCallback.Update().Register("gorm:update_time_stamp", updateTimeStampForUpdateCallback)
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defaultCallback.Update().Register("gorm:update", updateCallback)
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defaultCallback.Update().Register("gorm:save_after_associations", saveAfterAssociationsCallback)
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defaultCallback.Update().Register("gorm:after_update", afterUpdateCallback)
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defaultCallback.Update().Register("gorm:commit_or_rollback_transaction", commitOrRollbackTransactionCallback)
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}
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// assignUpdatingAttributesCallback assign updating attributes to model
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func assignUpdatingAttributesCallback(scope *Scope) {
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if attrs, ok := scope.InstanceGet("gorm:update_interface"); ok {
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if maps := convertInterfaceToMap(attrs); len(maps) > 0 {
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protected, ok := scope.Get("gorm:ignore_protected_attrs")
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_, updateColumn := scope.Get("gorm:update_column")
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updateAttrs, hasUpdate := scope.updatedAttrsWithValues(maps, ok && protected.(bool))
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if updateColumn {
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scope.InstanceSet("gorm:update_attrs", maps)
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} else if len(updateAttrs) > 0 {
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scope.InstanceSet("gorm:update_attrs", updateAttrs)
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} else if !hasUpdate {
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scope.SkipLeft()
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return
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}
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}
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}
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}
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// beforeUpdateCallback will invoke `BeforeSave`, `BeforeUpdate` method before updating
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func beforeUpdateCallback(scope *Scope) {
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if _, ok := scope.Get("gorm:update_column"); !ok {
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if !scope.HasError() {
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scope.CallMethod("BeforeSave")
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}
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if !scope.HasError() {
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scope.CallMethod("BeforeUpdate")
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}
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}
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}
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// updateTimeStampForUpdateCallback will set `UpdatedAt` when updating
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func updateTimeStampForUpdateCallback(scope *Scope) {
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if _, ok := scope.Get("gorm:update_column"); !ok {
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scope.SetColumn("UpdatedAt", NowFunc())
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}
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}
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// updateCallback the callback used to update data to database
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func updateCallback(scope *Scope) {
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if !scope.HasError() {
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var sqls []string
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if updateAttrs, ok := scope.InstanceGet("gorm:update_attrs"); ok {
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for column, value := range updateAttrs.(map[string]interface{}) {
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if field, ok := scope.FieldByName(column); ok {
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if scope.changeableField(field) {
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sqls = append(sqls, fmt.Sprintf("%v = %v", scope.Quote(field.DBName), scope.AddToVars(value)))
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}
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} else {
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sqls = append(sqls, fmt.Sprintf("%v = %v", scope.Quote(column), scope.AddToVars(value)))
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}
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}
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} else {
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fields := scope.Fields()
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for _, field := range fields {
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if scope.changeableField(field) {
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if !field.IsPrimaryKey && field.IsNormal {
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sqls = append(sqls, fmt.Sprintf("%v = %v", scope.Quote(field.DBName), scope.AddToVars(field.Field.Interface())))
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} else if relationship := field.Relationship; relationship != nil && relationship.Kind == "belongs_to" {
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for _, foreignKey := range relationship.ForeignDBNames {
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if foreignField := fields[foreignKey]; !scope.changeableField(foreignField) {
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sqls = append(sqls,
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fmt.Sprintf("%v = %v", scope.Quote(foreignField.DBName), scope.AddToVars(foreignField.Field.Interface())))
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}
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}
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}
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}
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}
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}
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if len(sqls) > 0 {
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scope.Raw(fmt.Sprintf(
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"UPDATE %v SET %v %v", scope.QuotedTableName(), strings.Join(sqls, ", "), scope.CombinedConditionSql(),
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)).Exec()
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}
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}
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}
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// afterUpdateCallback will invoke `AfterUpdate`, `AfterSave` method after updating
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func afterUpdateCallback(scope *Scope) {
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if _, ok := scope.Get("gorm:update_column"); !ok {
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if !scope.HasError() {
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scope.CallMethod("AfterUpdate")
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}
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if !scope.HasError() {
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scope.CallMethod("AfterSave")
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}
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}
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}
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