gtsocial-umbx

query_update.go (13579B)

---

 package bun
 
 import (
 	"context"
 	"database/sql"
 	"errors"
 	"fmt"
 
 	"github.com/uptrace/bun/dialect"
 
 	"github.com/uptrace/bun/dialect/feature"
 	"github.com/uptrace/bun/internal"
 	"github.com/uptrace/bun/schema"
 )
 
 type UpdateQuery struct {
 	whereBaseQuery
 	returningQuery
 	customValueQuery
 	setQuery
 	idxHintsQuery
 
 	omitZero bool
 }
 
 var _ Query = (*UpdateQuery)(nil)
 
 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.setModel(model)
 	return q
 }
 
 func (q *UpdateQuery) Err(err error) *UpdateQuery {
 	q.setErr(err)
 	return q
 }
 
 // Apply calls the fn passing the SelectQuery as an argument.
 func (q *UpdateQuery) Apply(fn func(*UpdateQuery) *UpdateQuery) *UpdateQuery {
 	if fn != nil {
 		return fn(q)
 	}
 	return q
 }
 
 func (q *UpdateQuery) With(name string, query schema.QueryAppender) *UpdateQuery {
 	q.addWith(name, query, false)
 	return q
 }
 
 func (q *UpdateQuery) WithRecursive(name string, query schema.QueryAppender) *UpdateQuery {
 	q.addWith(name, query, true)
 	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.modelTableName = 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
 }
 
 func (q *UpdateQuery) SetColumn(column string, query string, args ...interface{}) *UpdateQuery {
 	if q.db.HasFeature(feature.UpdateMultiTable) {
 		column = q.table.Alias + "." + column
 	}
 	q.addSet(schema.SafeQuery(column+" = "+query, args))
 	return q
 }
 
 // Value overwrites model value for the column.
 func (q *UpdateQuery) Value(column string, query string, args ...interface{}) *UpdateQuery {
 	if q.table == nil {
 		q.err = errNilModel
 		return q
 	}
 	q.addValue(q.table, column, query, args)
 	return q
 }
 
 func (q *UpdateQuery) OmitZero() *UpdateQuery {
 	q.omitZero = true
 	return q
 }
 
 //------------------------------------------------------------------------------
 
 func (q *UpdateQuery) WherePK(cols ...string) *UpdateQuery {
 	q.addWhereCols(cols)
 	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) Operation() string {
 	return "UPDATE"
 }
 
 func (q *UpdateQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
 	if q.err != nil {
 		return nil, q.err
 	}
 
 	fmter = formatterWithModel(fmter, q)
 
 	b, err = q.appendWith(fmter, b)
 	if err != nil {
 		return nil, err
 	}
 
 	b = append(b, "UPDATE "...)
 
 	if fmter.HasFeature(feature.UpdateMultiTable) {
 		b, err = q.appendTablesWithAlias(fmter, b)
 	} else if fmter.HasFeature(feature.UpdateTableAlias) {
 		b, err = q.appendFirstTableWithAlias(fmter, b)
 	} else {
 		b, err = q.appendFirstTable(fmter, b)
 	}
 	if err != nil {
 		return nil, err
 	}
 
 	b, err = q.appendIndexHints(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
 		}
 	}
 
 	if q.hasFeature(feature.Output) && q.hasReturning() {
 		b = append(b, " OUTPUT "...)
 		b, err = q.appendOutput(fmter, b)
 		if err != nil {
 			return nil, err
 		}
 	}
 
 	b, err = q.mustAppendWhere(fmter, b, q.hasTableAlias(fmter))
 	if err != nil {
 		return nil, err
 	}
 
 	if q.hasFeature(feature.Returning) && q.hasReturning() {
 		b = append(b, " RETURNING "...)
 		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 f.SkipUpdate() {
 			continue
 		}
 
 		app, hasValue := q.modelValues[f.Name]
 
 		if !hasValue && q.omitZero && 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
 		}
 
 		if hasValue {
 			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
 	}
 
 	set, err := q.updateSliceSet(q.db.fmter, model)
 	if err != nil {
 		q.setErr(err)
 		return q
 	}
 
 	values := q.db.NewValues(model)
 	values.customValueQuery = q.customValueQuery
 
 	return q.With("_data", values).
 		Model(model).
 		TableExpr("_data").
 		Set(set).
 		Where(q.updateSliceWhere(q.db.fmter, model))
 }
 
 func (q *UpdateQuery) updateSliceSet(
 	fmter schema.Formatter, model *sliceTableModel,
 ) (string, error) {
 	fields, err := q.getDataFields()
 	if err != nil {
 		return "", err
 	}
 
 	var b []byte
 	pos := len(b)
 	for _, field := range fields {
 		if field.SkipUpdate() {
 			continue
 		}
 		if len(b) != pos {
 			b = append(b, ", "...)
 			pos = len(b)
 		}
 		if 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), nil
 }
 
 func (q *UpdateQuery) updateSliceWhere(fmter schema.Formatter, model *sliceTableModel) string {
 	var b []byte
 	for i, pk := range model.table.PKs {
 		if i > 0 {
 			b = append(b, " AND "...)
 		}
 		if q.hasTableAlias(fmter) {
 			b = append(b, model.table.SQLAlias...)
 		} else {
 			b = append(b, model.table.SQLName...)
 		}
 		b = append(b, '.')
 		b = append(b, pk.SQLName...)
 		b = append(b, " = _data."...)
 		b = append(b, pk.SQLName...)
 	}
 	return internal.String(b)
 }
 
 //------------------------------------------------------------------------------
 
 func (q *UpdateQuery) Scan(ctx context.Context, dest ...interface{}) error {
 	_, err := q.scanOrExec(ctx, dest, true)
 	return err
 }
 
 func (q *UpdateQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
 	return q.scanOrExec(ctx, dest, len(dest) > 0)
 }
 
 func (q *UpdateQuery) scanOrExec(
 	ctx context.Context, dest []interface{}, hasDest bool,
 ) (sql.Result, error) {
 	if q.err != nil {
 		return nil, q.err
 	}
 
 	if q.table != nil {
 		if err := q.beforeUpdateHook(ctx); err != nil {
 			return nil, err
 		}
 	}
 
 	// Run append model hooks before generating the query.
 	if err := q.beforeAppendModel(ctx, q); err != nil {
 		return nil, err
 	}
 
 	// Generate the query before checking hasReturning.
 	queryBytes, err := q.AppendQuery(q.db.fmter, q.db.makeQueryBytes())
 	if err != nil {
 		return nil, err
 	}
 
 	useScan := hasDest || (q.hasReturning() && q.hasFeature(feature.Returning|feature.Output))
 	var model Model
 
 	if useScan {
 		var err error
 		model, err = q.getModel(dest)
 		if err != nil {
 			return nil, err
 		}
 	}
 
 	query := internal.String(queryBytes)
 
 	var res sql.Result
 
 	if useScan {
 		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 example, table_name.column_name or
 // table_alias.column_alias.
 func (q *UpdateQuery) FQN(column string) Ident {
 	if q.table == nil {
 		panic("UpdateQuery.FQN requires a model")
 	}
 	if q.hasTableAlias(q.db.fmter) {
 		return Ident(q.table.Alias + "." + column)
 	}
 	return Ident(q.table.Name + "." + column)
 }
 
 func (q *UpdateQuery) hasTableAlias(fmter schema.Formatter) bool {
 	return fmter.HasFeature(feature.UpdateMultiTable | feature.UpdateTableAlias)
 }
 
 func (q *UpdateQuery) String() string {
 	buf, err := q.AppendQuery(q.db.Formatter(), nil)
 	if err != nil {
 		panic(err)
 	}
 
 	return string(buf)
 }
 
 //------------------------------------------------------------------------------
 
 func (q *UpdateQuery) QueryBuilder() QueryBuilder {
 	return &updateQueryBuilder{q}
 }
 
 func (q *UpdateQuery) ApplyQueryBuilder(fn func(QueryBuilder) QueryBuilder) *UpdateQuery {
 	return fn(q.QueryBuilder()).Unwrap().(*UpdateQuery)
 }
 
 type updateQueryBuilder struct {
 	*UpdateQuery
 }
 
 func (q *updateQueryBuilder) WhereGroup(
 	sep string, fn func(QueryBuilder) QueryBuilder,
 ) QueryBuilder {
 	q.UpdateQuery = q.UpdateQuery.WhereGroup(sep, func(qs *UpdateQuery) *UpdateQuery {
 		return fn(q).(*updateQueryBuilder).UpdateQuery
 	})
 	return q
 }
 
 func (q *updateQueryBuilder) Where(query string, args ...interface{}) QueryBuilder {
 	q.UpdateQuery.Where(query, args...)
 	return q
 }
 
 func (q *updateQueryBuilder) WhereOr(query string, args ...interface{}) QueryBuilder {
 	q.UpdateQuery.WhereOr(query, args...)
 	return q
 }
 
 func (q *updateQueryBuilder) WhereDeleted() QueryBuilder {
 	q.UpdateQuery.WhereDeleted()
 	return q
 }
 
 func (q *updateQueryBuilder) WhereAllWithDeleted() QueryBuilder {
 	q.UpdateQuery.WhereAllWithDeleted()
 	return q
 }
 
 func (q *updateQueryBuilder) WherePK(cols ...string) QueryBuilder {
 	q.UpdateQuery.WherePK(cols...)
 	return q
 }
 
 func (q *updateQueryBuilder) Unwrap() interface{} {
 	return q.UpdateQuery
 }
 
 //------------------------------------------------------------------------------
 
 func (q *UpdateQuery) UseIndex(indexes ...string) *UpdateQuery {
 	if q.db.dialect.Name() == dialect.MySQL {
 		q.addUseIndex(indexes...)
 	}
 	return q
 }
 
 func (q *UpdateQuery) IgnoreIndex(indexes ...string) *UpdateQuery {
 	if q.db.dialect.Name() == dialect.MySQL {
 		q.addIgnoreIndex(indexes...)
 	}
 	return q
 }
 
 func (q *UpdateQuery) ForceIndex(indexes ...string) *UpdateQuery {
 	if q.db.dialect.Name() == dialect.MySQL {
 		q.addForceIndex(indexes...)
 	}
 	return q
 }