Lunny Xiao
f50e09f2ad
* add context support * fix config * fix circle config * golang test to go1.10
69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
// Copyright 2019 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 core
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import (
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"fmt"
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"strings"
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)
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// Filter is an interface to filter SQL
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type Filter interface {
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Do(sql string, dialect Dialect, table *Table) string
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}
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// QuoteFilter filter SQL replace ` to database's own quote character
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type QuoteFilter struct {
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}
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func (s *QuoteFilter) Do(sql string, dialect Dialect, table *Table) string {
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return strings.Replace(sql, "`", dialect.QuoteStr(), -1)
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}
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// IdFilter filter SQL replace (id) to primary key column name
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type IdFilter struct {
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}
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type Quoter struct {
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dialect Dialect
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}
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func NewQuoter(dialect Dialect) *Quoter {
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return &Quoter{dialect}
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}
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func (q *Quoter) Quote(content string) string {
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return q.dialect.QuoteStr() + content + q.dialect.QuoteStr()
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}
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func (i *IdFilter) Do(sql string, dialect Dialect, table *Table) string {
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quoter := NewQuoter(dialect)
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if table != nil && len(table.PrimaryKeys) == 1 {
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sql = strings.Replace(sql, " `(id)` ", " "+quoter.Quote(table.PrimaryKeys[0])+" ", -1)
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sql = strings.Replace(sql, " "+quoter.Quote("(id)")+" ", " "+quoter.Quote(table.PrimaryKeys[0])+" ", -1)
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return strings.Replace(sql, " (id) ", " "+quoter.Quote(table.PrimaryKeys[0])+" ", -1)
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}
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return sql
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}
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// SeqFilter filter SQL replace ?, ? ... to $1, $2 ...
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type SeqFilter struct {
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Prefix string
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Start int
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}
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func (s *SeqFilter) Do(sql string, dialect Dialect, table *Table) string {
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segs := strings.Split(sql, "?")
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size := len(segs)
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res := ""
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for i, c := range segs {
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if i < size-1 {
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res += c + fmt.Sprintf("%s%v", s.Prefix, i+s.Start)
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}
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}
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res += segs[size-1]
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return res
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}
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