Lunny Xiao
f9a6990ecb
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Reviewed-on: #2150
91 lines
2.2 KiB
Go
91 lines
2.2 KiB
Go
// Copyright 2022 The Xorm Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package statements
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import (
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"fmt"
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"strings"
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"xorm.io/builder"
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)
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func (statement *Statement) HasOrderBy() bool {
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return statement.orderStr != ""
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}
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// ResetOrderBy reset ordery conditions
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func (statement *Statement) ResetOrderBy() {
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statement.orderStr = ""
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statement.orderArgs = nil
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}
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// WriteOrderBy write order by to writer
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func (statement *Statement) WriteOrderBy(w builder.Writer) error {
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if len(statement.orderStr) > 0 {
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if _, err := fmt.Fprintf(w, " ORDER BY %s", statement.orderStr); err != nil {
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return err
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}
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w.Append(statement.orderArgs...)
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}
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return nil
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}
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// OrderBy generate "Order By order" statement
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func (statement *Statement) OrderBy(order interface{}, args ...interface{}) *Statement {
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if len(statement.orderStr) > 0 {
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statement.orderStr += ", "
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}
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var rawOrder string
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switch t := order.(type) {
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case (*builder.Expression):
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rawOrder = t.Content()
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args = t.Args()
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case string:
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rawOrder = t
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default:
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statement.LastError = ErrUnSupportedSQLType
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return statement
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}
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statement.orderStr += statement.ReplaceQuote(rawOrder)
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if len(args) > 0 {
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statement.orderArgs = append(statement.orderArgs, args...)
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}
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return statement
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}
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// Desc generate `ORDER BY xx DESC`
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func (statement *Statement) Desc(colNames ...string) *Statement {
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var buf strings.Builder
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if len(statement.orderStr) > 0 {
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fmt.Fprint(&buf, statement.orderStr, ", ")
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}
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for i, col := range colNames {
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if i > 0 {
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fmt.Fprint(&buf, ", ")
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}
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_ = statement.dialect.Quoter().QuoteTo(&buf, col)
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fmt.Fprint(&buf, " DESC")
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}
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statement.orderStr = buf.String()
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return statement
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}
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// Asc provide asc order by query condition, the input parameters are columns.
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func (statement *Statement) Asc(colNames ...string) *Statement {
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var buf strings.Builder
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if len(statement.orderStr) > 0 {
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fmt.Fprint(&buf, statement.orderStr, ", ")
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}
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for i, col := range colNames {
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if i > 0 {
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fmt.Fprint(&buf, ", ")
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}
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_ = statement.dialect.Quoter().QuoteTo(&buf, col)
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fmt.Fprint(&buf, " ASC")
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}
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statement.orderStr = buf.String()
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return statement
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}
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