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")
}
}
|
