gotosocial/vendor/github.com/uptrace/bun/query_update.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

433 lines
9.1 KiB
Go

package bun
import (
"context"
"database/sql"
"errors"
"fmt"
"github.com/uptrace/bun/dialect/feature"
"github.com/uptrace/bun/internal"
"github.com/uptrace/bun/schema"
)
type UpdateQuery struct {
whereBaseQuery
returningQuery
customValueQuery
setQuery
omitZero bool
}
func NewUpdateQuery(db *DB) *UpdateQuery {
q := &UpdateQuery{
whereBaseQuery: whereBaseQuery{
baseQuery: baseQuery{
db: db,
conn: db.DB,
},
},
}
return q
}
func (q *UpdateQuery) Conn(db IConn) *UpdateQuery {
q.setConn(db)
return q
}
func (q *UpdateQuery) Model(model interface{}) *UpdateQuery {
q.setTableModel(model)
return q
}
// Apply calls the fn passing the SelectQuery as an argument.
func (q *UpdateQuery) Apply(fn func(*UpdateQuery) *UpdateQuery) *UpdateQuery {
return fn(q)
}
func (q *UpdateQuery) With(name string, query schema.QueryAppender) *UpdateQuery {
q.addWith(name, query)
return q
}
//------------------------------------------------------------------------------
func (q *UpdateQuery) Table(tables ...string) *UpdateQuery {
for _, table := range tables {
q.addTable(schema.UnsafeIdent(table))
}
return q
}
func (q *UpdateQuery) TableExpr(query string, args ...interface{}) *UpdateQuery {
q.addTable(schema.SafeQuery(query, args))
return q
}
func (q *UpdateQuery) ModelTableExpr(query string, args ...interface{}) *UpdateQuery {
q.modelTable = schema.SafeQuery(query, args)
return q
}
//------------------------------------------------------------------------------
func (q *UpdateQuery) Column(columns ...string) *UpdateQuery {
for _, column := range columns {
q.addColumn(schema.UnsafeIdent(column))
}
return q
}
func (q *UpdateQuery) ExcludeColumn(columns ...string) *UpdateQuery {
q.excludeColumn(columns)
return q
}
func (q *UpdateQuery) Set(query string, args ...interface{}) *UpdateQuery {
q.addSet(schema.SafeQuery(query, args))
return q
}
// Value overwrites model value for the column in INSERT and UPDATE queries.
func (q *UpdateQuery) Value(column string, value string, args ...interface{}) *UpdateQuery {
if q.table == nil {
q.err = errNilModel
return q
}
q.addValue(q.table, column, value, args)
return q
}
//------------------------------------------------------------------------------
func (q *UpdateQuery) WherePK() *UpdateQuery {
q.flags = q.flags.Set(wherePKFlag)
return q
}
func (q *UpdateQuery) Where(query string, args ...interface{}) *UpdateQuery {
q.addWhere(schema.SafeQueryWithSep(query, args, " AND "))
return q
}
func (q *UpdateQuery) WhereOr(query string, args ...interface{}) *UpdateQuery {
q.addWhere(schema.SafeQueryWithSep(query, args, " OR "))
return q
}
func (q *UpdateQuery) WhereGroup(sep string, fn func(*UpdateQuery) *UpdateQuery) *UpdateQuery {
saved := q.where
q.where = nil
q = fn(q)
where := q.where
q.where = saved
q.addWhereGroup(sep, where)
return q
}
func (q *UpdateQuery) WhereDeleted() *UpdateQuery {
q.whereDeleted()
return q
}
func (q *UpdateQuery) WhereAllWithDeleted() *UpdateQuery {
q.whereAllWithDeleted()
return q
}
//------------------------------------------------------------------------------
// Returning adds a RETURNING clause to the query.
//
// To suppress the auto-generated RETURNING clause, use `Returning("NULL")`.
func (q *UpdateQuery) Returning(query string, args ...interface{}) *UpdateQuery {
q.addReturning(schema.SafeQuery(query, args))
return q
}
func (q *UpdateQuery) hasReturning() bool {
if !q.db.features.Has(feature.Returning) {
return false
}
return q.returningQuery.hasReturning()
}
//------------------------------------------------------------------------------
func (q *UpdateQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
if q.err != nil {
return nil, q.err
}
fmter = formatterWithModel(fmter, q)
withAlias := fmter.HasFeature(feature.UpdateMultiTable)
b, err = q.appendWith(fmter, b)
if err != nil {
return nil, err
}
b = append(b, "UPDATE "...)
if withAlias {
b, err = q.appendTablesWithAlias(fmter, b)
} else {
b, err = q.appendFirstTableWithAlias(fmter, b)
}
if err != nil {
return nil, err
}
b, err = q.mustAppendSet(fmter, b)
if err != nil {
return nil, err
}
if !fmter.HasFeature(feature.UpdateMultiTable) {
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 *UpdateQuery) mustAppendSet(fmter schema.Formatter, b []byte) (_ []byte, err error) {
b = append(b, " SET "...)
if len(q.set) > 0 {
return q.appendSet(fmter, b)
}
if m, ok := q.model.(*mapModel); ok {
return m.appendSet(fmter, b), nil
}
if q.tableModel == nil {
return nil, errNilModel
}
switch model := q.tableModel.(type) {
case *structTableModel:
b, err = q.appendSetStruct(fmter, b, model)
if err != nil {
return nil, err
}
case *sliceTableModel:
return nil, errors.New("bun: to bulk Update, use CTE and VALUES")
default:
return nil, fmt.Errorf("bun: Update does not support %T", q.tableModel)
}
return b, nil
}
func (q *UpdateQuery) appendSetStruct(
fmter schema.Formatter, b []byte, model *structTableModel,
) ([]byte, error) {
fields, err := q.getDataFields()
if err != nil {
return nil, err
}
isTemplate := fmter.IsNop()
pos := len(b)
for _, f := range fields {
if q.omitZero && f.NullZero && f.HasZeroValue(model.strct) {
continue
}
if len(b) != pos {
b = append(b, ", "...)
pos = len(b)
}
b = append(b, f.SQLName...)
b = append(b, " = "...)
if isTemplate {
b = append(b, '?')
continue
}
app, ok := q.modelValues[f.Name]
if ok {
b, err = app.AppendQuery(fmter, b)
if err != nil {
return nil, err
}
} else {
b = f.AppendValue(fmter, b, model.strct)
}
}
for i, v := range q.extraValues {
if i > 0 || len(fields) > 0 {
b = append(b, ", "...)
}
b = append(b, v.column...)
b = append(b, " = "...)
b, err = v.value.AppendQuery(fmter, b)
if err != nil {
return nil, err
}
}
return b, nil
}
func (q *UpdateQuery) appendOtherTables(fmter schema.Formatter, b []byte) (_ []byte, err error) {
if !q.hasMultiTables() {
return b, nil
}
b = append(b, " FROM "...)
b, err = q.whereBaseQuery.appendOtherTables(fmter, b)
if err != nil {
return nil, err
}
return b, nil
}
//------------------------------------------------------------------------------
func (q *UpdateQuery) Bulk() *UpdateQuery {
model, ok := q.model.(*sliceTableModel)
if !ok {
q.setErr(fmt.Errorf("bun: Bulk requires a slice, got %T", q.model))
return q
}
return q.With("_data", q.db.NewValues(model)).
Model(model).
TableExpr("_data").
Set(q.updateSliceSet(model)).
Where(q.updateSliceWhere(model))
}
func (q *UpdateQuery) updateSliceSet(model *sliceTableModel) string {
var b []byte
for i, field := range model.table.DataFields {
if i > 0 {
b = append(b, ", "...)
}
if q.db.fmter.HasFeature(feature.UpdateMultiTable) {
b = append(b, model.table.SQLAlias...)
b = append(b, '.')
}
b = append(b, field.SQLName...)
b = append(b, " = _data."...)
b = append(b, field.SQLName...)
}
return internal.String(b)
}
func (db *UpdateQuery) updateSliceWhere(model *sliceTableModel) string {
var b []byte
for i, pk := range model.table.PKs {
if i > 0 {
b = append(b, " AND "...)
}
b = append(b, model.table.SQLAlias...)
b = append(b, '.')
b = append(b, pk.SQLName...)
b = append(b, " = _data."...)
b = append(b, pk.SQLName...)
}
return internal.String(b)
}
//------------------------------------------------------------------------------
func (q *UpdateQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
if q.table != nil {
if err := q.beforeUpdateHook(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.afterUpdateHook(ctx); err != nil {
return nil, err
}
}
return res, nil
}
func (q *UpdateQuery) beforeUpdateHook(ctx context.Context) error {
if hook, ok := q.table.ZeroIface.(BeforeUpdateHook); ok {
if err := hook.BeforeUpdate(ctx, q); err != nil {
return err
}
}
return nil
}
func (q *UpdateQuery) afterUpdateHook(ctx context.Context) error {
if hook, ok := q.table.ZeroIface.(AfterUpdateHook); ok {
if err := hook.AfterUpdate(ctx, q); err != nil {
return err
}
}
return nil
}
// FQN returns a fully qualified column name. For MySQL, it returns the column name with
// the table alias. For other RDBMS, it returns just the column name.
func (q *UpdateQuery) FQN(name string) Ident {
if q.db.fmter.HasFeature(feature.UpdateMultiTable) {
return Ident(q.table.Alias + "." + name)
}
return Ident(name)
}