59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
package db
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
|
|
"github.com/pkg/errors"
|
|
"github.com/uptrace/bun"
|
|
)
|
|
|
|
type deleter[T any] struct {
|
|
q *bun.DeleteQuery
|
|
}
|
|
|
|
type systemType interface {
|
|
isSystem() bool
|
|
}
|
|
|
|
func DeleteItem[T any](tx bun.Tx) *deleter[T] {
|
|
return &deleter[T]{
|
|
tx.NewDelete().
|
|
Model((*T)(nil)),
|
|
}
|
|
}
|
|
|
|
func (d *deleter[T]) Where(query string, args ...any) *deleter[T] {
|
|
d.q = d.q.Where(query, args...)
|
|
return d
|
|
}
|
|
|
|
func (d *deleter[T]) Delete(ctx context.Context) error {
|
|
_, err := d.q.Exec(ctx)
|
|
if err != nil {
|
|
if err == sql.ErrNoRows {
|
|
return nil
|
|
}
|
|
}
|
|
return errors.Wrap(err, "bun.DeleteQuery.Exec")
|
|
}
|
|
|
|
func DeleteByID[T any](tx bun.Tx, id int) *deleter[T] {
|
|
return DeleteItem[T](tx).Where("id = ?", id)
|
|
}
|
|
|
|
func DeleteWithProtection[T systemType](ctx context.Context, tx bun.Tx, id int) error {
|
|
deleter := DeleteByID[T](tx, id)
|
|
item, err := GetByID[T](tx, id).GetFirst(ctx)
|
|
if err != nil {
|
|
return errors.Wrap(err, "GetByID")
|
|
}
|
|
if item == nil {
|
|
return errors.New("record not found")
|
|
}
|
|
if (*item).isSystem() {
|
|
return errors.New("record is system protected")
|
|
}
|
|
return deleter.Delete(ctx)
|
|
}
|