gotosocial/vendor/github.com/uptrace/bun/query_delete.go
tobi 2dc9fc1626
Pg to bun (#148)
* start moving to bun

* changing more stuff

* more

* and yet more

* tests passing

* seems stable now

* more big changes

* small fix

* little fixes
2021-08-25 15:34:33 +02:00

256 lines
5.4 KiB
Go

package bun
import (
"context"
"database/sql"
"github.com/uptrace/bun/dialect/feature"
"github.com/uptrace/bun/internal"
"github.com/uptrace/bun/schema"
)
type DeleteQuery struct {
whereBaseQuery
returningQuery
}
func NewDeleteQuery(db *DB) *DeleteQuery {
q := &DeleteQuery{
whereBaseQuery: whereBaseQuery{
baseQuery: baseQuery{
db: db,
conn: db.DB,
},
},
}
return q
}
func (q *DeleteQuery) Conn(db IConn) *DeleteQuery {
q.setConn(db)
return q
}
func (q *DeleteQuery) Model(model interface{}) *DeleteQuery {
q.setTableModel(model)
return q
}
// Apply calls the fn passing the DeleteQuery as an argument.
func (q *DeleteQuery) Apply(fn func(*DeleteQuery) *DeleteQuery) *DeleteQuery {
return fn(q)
}
func (q *DeleteQuery) With(name string, query schema.QueryAppender) *DeleteQuery {
q.addWith(name, query)
return q
}
func (q *DeleteQuery) Table(tables ...string) *DeleteQuery {
for _, table := range tables {
q.addTable(schema.UnsafeIdent(table))
}
return q
}
func (q *DeleteQuery) TableExpr(query string, args ...interface{}) *DeleteQuery {
q.addTable(schema.SafeQuery(query, args))
return q
}
func (q *DeleteQuery) ModelTableExpr(query string, args ...interface{}) *DeleteQuery {
q.modelTable = schema.SafeQuery(query, args)
return q
}
//------------------------------------------------------------------------------
func (q *DeleteQuery) WherePK() *DeleteQuery {
q.flags = q.flags.Set(wherePKFlag)
return q
}
func (q *DeleteQuery) Where(query string, args ...interface{}) *DeleteQuery {
q.addWhere(schema.SafeQueryWithSep(query, args, " AND "))
return q
}
func (q *DeleteQuery) WhereOr(query string, args ...interface{}) *DeleteQuery {
q.addWhere(schema.SafeQueryWithSep(query, args, " OR "))
return q
}
func (q *DeleteQuery) WhereGroup(sep string, fn func(*DeleteQuery) *DeleteQuery) *DeleteQuery {
saved := q.where
q.where = nil
q = fn(q)
where := q.where
q.where = saved
q.addWhereGroup(sep, where)
return q
}
func (q *DeleteQuery) WhereDeleted() *DeleteQuery {
q.whereDeleted()
return q
}
func (q *DeleteQuery) WhereAllWithDeleted() *DeleteQuery {
q.whereAllWithDeleted()
return q
}
func (q *DeleteQuery) ForceDelete() *DeleteQuery {
q.flags = q.flags.Set(forceDeleteFlag)
return q
}
//------------------------------------------------------------------------------
// Returning adds a RETURNING clause to the query.
//
// To suppress the auto-generated RETURNING clause, use `Returning("NULL")`.
func (q *DeleteQuery) Returning(query string, args ...interface{}) *DeleteQuery {
q.addReturning(schema.SafeQuery(query, args))
return q
}
func (q *DeleteQuery) hasReturning() bool {
if !q.db.features.Has(feature.Returning) {
return false
}
return q.returningQuery.hasReturning()
}
//------------------------------------------------------------------------------
func (q *DeleteQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
if q.err != nil {
return nil, q.err
}
fmter = formatterWithModel(fmter, q)
if q.isSoftDelete() {
if err := q.tableModel.updateSoftDeleteField(); err != nil {
return nil, err
}
upd := UpdateQuery{
whereBaseQuery: q.whereBaseQuery,
returningQuery: q.returningQuery,
}
upd.Column(q.table.SoftDeleteField.Name)
return upd.AppendQuery(fmter, b)
}
q = q.WhereAllWithDeleted()
withAlias := q.db.features.Has(feature.DeleteTableAlias)
b, err = q.appendWith(fmter, b)
if err != nil {
return nil, err
}
b = append(b, "DELETE FROM "...)
if withAlias {
b, err = q.appendFirstTableWithAlias(fmter, b)
} else {
b, err = q.appendFirstTable(fmter, b)
}
if err != nil {
return nil, err
}
if q.hasMultiTables() {
b = append(b, " USING "...)
b, err = q.appendOtherTables(fmter, b)
if err != nil {
return nil, err
}
}
b, err = q.mustAppendWhere(fmter, b, withAlias)
if err != nil {
return nil, err
}
if len(q.returning) > 0 {
b, err = q.appendReturning(fmter, b)
if err != nil {
return nil, err
}
}
return b, nil
}
func (q *DeleteQuery) isSoftDelete() bool {
return q.tableModel != nil && q.table.SoftDeleteField != nil && !q.flags.Has(forceDeleteFlag)
}
//------------------------------------------------------------------------------
func (q *DeleteQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
if q.table != nil {
if err := q.beforeDeleteHook(ctx); err != nil {
return nil, err
}
}
queryBytes, err := q.AppendQuery(q.db.fmter, q.db.makeQueryBytes())
if err != nil {
return nil, err
}
query := internal.String(queryBytes)
var res sql.Result
if hasDest := len(dest) > 0; hasDest || q.hasReturning() {
model, err := q.getModel(dest)
if err != nil {
return nil, err
}
res, err = q.scan(ctx, q, query, model, hasDest)
if err != nil {
return nil, err
}
} else {
res, err = q.exec(ctx, q, query)
if err != nil {
return nil, err
}
}
if q.table != nil {
if err := q.afterDeleteHook(ctx); err != nil {
return nil, err
}
}
return res, nil
}
func (q *DeleteQuery) beforeDeleteHook(ctx context.Context) error {
if hook, ok := q.table.ZeroIface.(BeforeDeleteHook); ok {
if err := hook.BeforeDelete(ctx, q); err != nil {
return err
}
}
return nil
}
func (q *DeleteQuery) afterDeleteHook(ctx context.Context) error {
if hook, ok := q.table.ZeroIface.(AfterDeleteHook); ok {
if err := hook.AfterDelete(ctx, q); err != nil {
return err
}
}
return nil
}