mirror of
https://github.com/astaxie/beego.git
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295 lines
7.0 KiB
Go
295 lines
7.0 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package orm
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import (
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"fmt"
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"os"
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"strings"
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)
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type dbIndex struct {
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Table string
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Name string
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SQL string
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}
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// create database drop sql.
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func getDbDropSQL(al *alias) (sqls []string) {
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if len(modelCache.cache) == 0 {
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fmt.Println("no Model found, need register your model")
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os.Exit(2)
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}
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Q := al.DbBaser.TableQuote()
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for _, mi := range modelCache.allOrdered() {
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sqls = append(sqls, fmt.Sprintf(`DROP TABLE IF EXISTS %s%s%s`, Q, mi.table, Q))
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}
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return sqls
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}
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// get database column type string.
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func getColumnTyp(al *alias, fi *fieldInfo) (col string) {
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T := al.DbBaser.DbTypes()
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fieldType := fi.fieldType
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fieldSize := fi.size
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checkColumn:
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switch fieldType {
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case TypeBooleanField:
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col = T["bool"]
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case TypeCharField:
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col = fmt.Sprintf(T["string"], fieldSize)
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case TypeTextField:
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col = T["string-text"]
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case TypeDateField:
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col = T["time.Time-date"]
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case TypeDateTimeField:
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col = T["time.Time"]
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case TypeBitField:
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col = T["int8"]
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case TypeSmallIntegerField:
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col = T["int16"]
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case TypeIntegerField:
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col = T["int32"]
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case TypeBigIntegerField:
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if al.Driver == DRSqlite {
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fieldType = TypeIntegerField
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goto checkColumn
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}
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col = T["int64"]
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case TypePositiveBitField:
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col = T["uint8"]
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case TypePositiveSmallIntegerField:
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col = T["uint16"]
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case TypePositiveIntegerField:
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col = T["uint32"]
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case TypePositiveBigIntegerField:
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col = T["uint64"]
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case TypeFloatField:
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col = T["float64"]
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case TypeDecimalField:
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s := T["float64-decimal"]
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if strings.Index(s, "%d") == -1 {
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col = s
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} else {
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col = fmt.Sprintf(s, fi.digits, fi.decimals)
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}
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case RelForeignKey, RelOneToOne:
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fieldType = fi.relModelInfo.fields.pk.fieldType
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fieldSize = fi.relModelInfo.fields.pk.size
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goto checkColumn
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}
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return
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}
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// create alter sql string.
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func getColumnAddQuery(al *alias, fi *fieldInfo) string {
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Q := al.DbBaser.TableQuote()
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typ := getColumnTyp(al, fi)
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if fi.null == false {
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typ += " " + "NOT NULL"
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}
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return fmt.Sprintf("ALTER TABLE %s%s%s ADD COLUMN %s%s%s %s %s",
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Q, fi.mi.table, Q,
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Q, fi.column, Q,
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typ, getColumnDefault(fi),
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)
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}
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// create database creation string.
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func getDbCreateSQL(al *alias) (sqls []string, tableIndexes map[string][]dbIndex) {
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if len(modelCache.cache) == 0 {
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fmt.Println("no Model found, need register your model")
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os.Exit(2)
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}
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Q := al.DbBaser.TableQuote()
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T := al.DbBaser.DbTypes()
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sep := fmt.Sprintf("%s, %s", Q, Q)
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tableIndexes = make(map[string][]dbIndex)
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for _, mi := range modelCache.allOrdered() {
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sql := fmt.Sprintf("-- %s\n", strings.Repeat("-", 50))
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sql += fmt.Sprintf("-- Table Structure for `%s`\n", mi.fullName)
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sql += fmt.Sprintf("-- %s\n", strings.Repeat("-", 50))
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sql += fmt.Sprintf("CREATE TABLE IF NOT EXISTS %s%s%s (\n", Q, mi.table, Q)
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columns := make([]string, 0, len(mi.fields.fieldsDB))
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sqlIndexes := [][]string{}
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for _, fi := range mi.fields.fieldsDB {
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column := fmt.Sprintf(" %s%s%s ", Q, fi.column, Q)
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col := getColumnTyp(al, fi)
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if fi.auto {
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switch al.Driver {
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case DRSqlite, DRPostgres:
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column += T["auto"]
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default:
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column += col + " " + T["auto"]
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}
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} else if fi.pk {
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column += col + " " + T["pk"]
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} else {
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column += col
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if fi.null == false {
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column += " " + "NOT NULL"
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}
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//if fi.initial.String() != "" {
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// column += " DEFAULT " + fi.initial.String()
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//}
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// Append attribute DEFAULT
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column += getColumnDefault(fi)
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if fi.unique {
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column += " " + "UNIQUE"
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}
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if fi.index {
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sqlIndexes = append(sqlIndexes, []string{fi.column})
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}
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}
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if strings.Index(column, "%COL%") != -1 {
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column = strings.Replace(column, "%COL%", fi.column, -1)
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}
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columns = append(columns, column)
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}
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if mi.model != nil {
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allnames := getTableUnique(mi.addrField)
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if !mi.manual && len(mi.uniques) > 0 {
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allnames = append(allnames, mi.uniques)
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}
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for _, names := range allnames {
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cols := make([]string, 0, len(names))
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for _, name := range names {
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if fi, ok := mi.fields.GetByAny(name); ok && fi.dbcol {
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cols = append(cols, fi.column)
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} else {
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panic(fmt.Errorf("cannot found column `%s` when parse UNIQUE in `%s.TableUnique`", name, mi.fullName))
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}
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}
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column := fmt.Sprintf(" UNIQUE (%s%s%s)", Q, strings.Join(cols, sep), Q)
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columns = append(columns, column)
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}
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}
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sql += strings.Join(columns, ",\n")
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sql += "\n)"
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if al.Driver == DRMySQL {
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var engine string
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if mi.model != nil {
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engine = getTableEngine(mi.addrField)
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}
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if engine == "" {
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engine = al.Engine
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}
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sql += " ENGINE=" + engine
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}
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sql += ";"
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sqls = append(sqls, sql)
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if mi.model != nil {
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for _, names := range getTableIndex(mi.addrField) {
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cols := make([]string, 0, len(names))
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for _, name := range names {
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if fi, ok := mi.fields.GetByAny(name); ok && fi.dbcol {
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cols = append(cols, fi.column)
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} else {
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panic(fmt.Errorf("cannot found column `%s` when parse INDEX in `%s.TableIndex`", name, mi.fullName))
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}
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}
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sqlIndexes = append(sqlIndexes, cols)
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}
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}
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for _, names := range sqlIndexes {
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name := mi.table + "_" + strings.Join(names, "_")
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cols := strings.Join(names, sep)
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sql := fmt.Sprintf("CREATE INDEX %s%s%s ON %s%s%s (%s%s%s);", Q, name, Q, Q, mi.table, Q, Q, cols, Q)
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index := dbIndex{}
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index.Table = mi.table
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index.Name = name
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index.SQL = sql
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tableIndexes[mi.table] = append(tableIndexes[mi.table], index)
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}
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}
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return
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}
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// Get string value for the attribute "DEFAULT" for the CREATE, ALTER commands
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func getColumnDefault(fi *fieldInfo) string {
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var (
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v, t, d string
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)
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// Skip default attribute if field is in relations
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if fi.rel || fi.reverse {
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return v
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}
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t = " DEFAULT '%s' "
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// These defaults will be useful if there no config value orm:"default" and NOT NULL is on
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switch fi.fieldType {
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case TypeDateField, TypeDateTimeField, TypeTextField:
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return v
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case TypeBitField, TypeSmallIntegerField, TypeIntegerField,
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TypeBigIntegerField, TypePositiveBitField, TypePositiveSmallIntegerField,
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TypePositiveIntegerField, TypePositiveBigIntegerField, TypeFloatField,
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TypeDecimalField:
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t = " DEFAULT %s "
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d = "0"
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case TypeBooleanField:
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t = " DEFAULT %s "
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d = "FALSE"
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}
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if fi.colDefault {
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if !fi.initial.Exist() {
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v = fmt.Sprintf(t, "")
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} else {
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v = fmt.Sprintf(t, fi.initial.String())
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}
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} else {
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if !fi.null {
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v = fmt.Sprintf(t, d)
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}
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}
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return v
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}
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