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bee/generate/g_migration.go

249 lines
6.8 KiB

// Copyright 2013 bee authors
//
// Licensed under the Apache License, Version 2.0 (the "License"): you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.
package generate
import (
"fmt"
"os"
"path"
"strings"
"time"
beeLogger "github.com/beego/bee/logger"
"github.com/beego/bee/logger/colors"
"github.com/beego/bee/utils"
)
const (
MPath = "migrations"
MDateFormat = "20060102_150405"
DBPath = "database"
)
type DBDriver interface {
GenerateCreateUp(tableName string) string
GenerateCreateDown(tableName string) string
}
type mysqlDriver struct{}
func (m mysqlDriver) GenerateCreateUp(tableName string) string {
upsql := `m.SQL("CREATE TABLE ` + tableName + "(" + m.generateSQLFromFields(Fields.String()) + `)");`
return upsql
}
func (m mysqlDriver) GenerateCreateDown(tableName string) string {
downsql := `m.SQL("DROP TABLE ` + "`" + tableName + "`" + `")`
return downsql
}
func (m mysqlDriver) generateSQLFromFields(fields string) string {
sql, tags := "", ""
fds := strings.Split(fields, ",")
for i, v := range fds {
kv := strings.SplitN(v, ":", 2)
if len(kv) != 2 {
beeLogger.Log.Error("Fields format is wrong. Should be: key:type,key:type " + v)
return ""
}
typ, tag := m.getSQLType(kv[1])
if typ == "" {
beeLogger.Log.Error("Fields format is wrong. Should be: key:type,key:type " + v)
return ""
}
if i == 0 && strings.ToLower(kv[0]) != "id" {
sql += "`id` int(11) NOT NULL AUTO_INCREMENT,"
tags = tags + "PRIMARY KEY (`id`),"
}
sql += "`" + utils.SnakeString(kv[0]) + "` " + typ + ","
if tag != "" {
tags = tags + fmt.Sprintf(tag, "`"+utils.SnakeString(kv[0])+"`") + ","
}
}
sql = strings.TrimRight(sql+tags, ",")
return sql
}
func (m mysqlDriver) getSQLType(ktype string) (tp, tag string) {
kv := strings.SplitN(ktype, ":", 2)
switch kv[0] {
case "string":
if len(kv) == 2 {
return "varchar(" + kv[1] + ") NOT NULL", ""
}
return "varchar(128) NOT NULL", ""
case "text":
return "longtext NOT NULL", ""
case "auto":
return "int(11) NOT NULL AUTO_INCREMENT", ""
case "pk":
return "int(11) NOT NULL", "PRIMARY KEY (%s)"
case "datetime":
return "datetime NOT NULL", ""
case "int", "int8", "int16", "int32", "int64":
fallthrough
case "uint", "uint8", "uint16", "uint32", "uint64":
return "int(11) DEFAULT NULL", ""
case "bool":
return "tinyint(1) NOT NULL", ""
case "float32", "float64":
return "float NOT NULL", ""
case "float":
return "float NOT NULL", ""
}
return "", ""
}
type postgresqlDriver struct{}
func (m postgresqlDriver) GenerateCreateUp(tableName string) string {
upsql := `m.SQL("CREATE TABLE ` + tableName + "(" + m.generateSQLFromFields(Fields.String()) + `)");`
return upsql
}
func (m postgresqlDriver) GenerateCreateDown(tableName string) string {
downsql := `m.SQL("DROP TABLE ` + tableName + `")`
return downsql
}
func (m postgresqlDriver) generateSQLFromFields(fields string) string {
sql, tags := "", ""
fds := strings.Split(fields, ",")
for i, v := range fds {
kv := strings.SplitN(v, ":", 2)
if len(kv) != 2 {
beeLogger.Log.Error("Fields format is wrong. Should be: key:type,key:type " + v)
return ""
}
typ, tag := m.getSQLType(kv[1])
if typ == "" {
beeLogger.Log.Error("Fields format is wrong. Should be: key:type,key:type " + v)
return ""
}
if i == 0 && strings.ToLower(kv[0]) != "id" {
sql += "id serial primary key,"
}
sql += utils.SnakeString(kv[0]) + " " + typ + ","
if tag != "" {
tags = tags + fmt.Sprintf(tag, utils.SnakeString(kv[0])) + ","
}
}
if tags != "" {
sql = strings.TrimRight(sql+" "+tags, ",")
} else {
sql = strings.TrimRight(sql, ",")
}
return sql
}
func (m postgresqlDriver) getSQLType(ktype string) (tp, tag string) {
kv := strings.SplitN(ktype, ":", 2)
switch kv[0] {
case "string":
if len(kv) == 2 {
return "char(" + kv[1] + ") NOT NULL", ""
}
return "TEXT NOT NULL", ""
case "text":
return "TEXT NOT NULL", ""
case "auto", "pk":
return "serial primary key", ""
case "datetime":
return "TIMESTAMP WITHOUT TIME ZONE NOT NULL", ""
case "int", "int8", "int16", "int32", "int64":
fallthrough
case "uint", "uint8", "uint16", "uint32", "uint64":
return "integer DEFAULT NULL", ""
case "bool":
return "boolean NOT NULL", ""
case "float32", "float64", "float":
return "numeric NOT NULL", ""
}
return "", ""
}
func NewDBDriver() DBDriver {
switch SQLDriver {
case "mysql":
return mysqlDriver{}
case "postgres":
return postgresqlDriver{}
default:
beeLogger.Log.Fatal("Driver not supported")
return nil
}
}
// generateMigration generates migration file template for database schema update.
// The generated file template consists of an up() method for updating schema and
// a down() method for reverting the update.
func GenerateMigration(mname, upsql, downsql, curpath string) {
w := colors.NewColorWriter(os.Stdout)
migrationFilePath := path.Join(curpath, DBPath, MPath)
if _, err := os.Stat(migrationFilePath); os.IsNotExist(err) {
// create migrations directory
if err := os.MkdirAll(migrationFilePath, 0777); err != nil {
beeLogger.Log.Fatalf("Could not create migration directory: %s", err)
}
}
// create file
today := time.Now().Format(MDateFormat)
fpath := path.Join(migrationFilePath, fmt.Sprintf("%s_%s.go", today, mname))
if f, err := os.OpenFile(fpath, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0666); err == nil {
defer utils.CloseFile(f)
content := strings.Replace(MigrationTPL, "{{StructName}}", utils.CamelCase(mname)+"_"+today, -1)
content = strings.Replace(content, "{{CurrTime}}", today, -1)
content = strings.Replace(content, "{{UpSQL}}", upsql, -1)
content = strings.Replace(content, "{{DownSQL}}", downsql, -1)
f.WriteString(content)
// Run 'gofmt' on the generated source code
utils.FormatSourceCode(fpath)
fmt.Fprintf(w, "\t%s%screate%s\t %s%s\n", "\x1b[32m", "\x1b[1m", "\x1b[21m", fpath, "\x1b[0m")
} else {
beeLogger.Log.Fatalf("Could not create migration file: %s", err)
}
}
const MigrationTPL = `package main
import (
"github.com/astaxie/beego/migration"
)
// DO NOT MODIFY
type {{StructName}} struct {
migration.Migration
}
// DO NOT MODIFY
func init() {
m := &{{StructName}}{}
m.Created = "{{CurrTime}}"
migration.Register("{{StructName}}", m)
}
// Run the migrations
func (m *{{StructName}}) Up() {
// use m.SQL("CREATE TABLE ...") to make schema update
{{UpSQL}}
}
// Reverse the migrations
func (m *{{StructName}}) Down() {
// use m.SQL("DROP TABLE ...") to reverse schema update
{{DownSQL}}
}
`