1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
|
package gorm
import (
"errors"
"fmt"
)
// Define callbacks for deleting
func init() {
DefaultCallback.Delete().Register("gorm:begin_transaction", beginTransactionCallback)
DefaultCallback.Delete().Register("gorm:before_delete", beforeDeleteCallback)
DefaultCallback.Delete().Register("gorm:delete", deleteCallback)
DefaultCallback.Delete().Register("gorm:after_delete", afterDeleteCallback)
DefaultCallback.Delete().Register("gorm:commit_or_rollback_transaction", commitOrRollbackTransactionCallback)
}
// beforeDeleteCallback will invoke `BeforeDelete` method before deleting
func beforeDeleteCallback(scope *Scope) {
if scope.DB().HasBlockGlobalUpdate() && !scope.hasConditions() {
scope.Err(errors.New("missing WHERE clause while deleting"))
return
}
if !scope.HasError() {
scope.CallMethod("BeforeDelete")
}
}
// deleteCallback used to delete data from database or set deleted_at to current time (when using with soft delete)
func deleteCallback(scope *Scope) {
if !scope.HasError() {
var extraOption string
if str, ok := scope.Get("gorm:delete_option"); ok {
extraOption = fmt.Sprint(str)
}
deletedAtField, hasDeletedAtField := scope.FieldByName("DeletedAt")
if !scope.Search.Unscoped && hasDeletedAtField {
scope.Raw(fmt.Sprintf(
"UPDATE %v SET %v=%v%v%v",
scope.QuotedTableName(),
scope.Quote(deletedAtField.DBName),
scope.AddToVars(scope.db.nowFunc()),
addExtraSpaceIfExist(scope.CombinedConditionSql()),
addExtraSpaceIfExist(extraOption),
)).Exec()
} else {
scope.Raw(fmt.Sprintf(
"DELETE FROM %v%v%v",
scope.QuotedTableName(),
addExtraSpaceIfExist(scope.CombinedConditionSql()),
addExtraSpaceIfExist(extraOption),
)).Exec()
}
}
}
// afterDeleteCallback will invoke `AfterDelete` method after deleting
func afterDeleteCallback(scope *Scope) {
if !scope.HasError() {
scope.CallMethod("AfterDelete")
}
}
|