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db.go
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db.go
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package xormtest
import (
"database/sql"
"fmt"
"os"
"testing"
"time"
_ "github.com/go-sql-driver/mysql"
"github.com/lib/pq"
_ "github.com/mattn/go-sqlite3"
"xorm.io/xorm"
)
type DB struct {
engine *xorm.Engine
name string
}
// Close drop database and close database connection
func (db *DB) Close() (err error) {
// drop database
defer func() {
if e := dropDatabase(db.engine.DriverName(), db.engine.DataSourceName(), db.name); e != nil {
err = e
}
}()
// close database connection
return db.engine.Close()
}
func (db *DB) initDB(beans []interface{}) error {
if testing.Verbose() {
// db.engine.ShowExecTime(true)
db.engine.ShowSQL(true)
}
return db.engine.Sync2(beans...)
}
func (db *DB) Engine() *xorm.Engine {
return db.engine
}
func NewDB(driver string, dataSourceName string, dbName string, beans ...interface{}) (*DB, error) {
var engine *xorm.Engine
var err error
dbName = getDBNameWithPrefix(dbName)
if err := createDatabase(driver, dataSourceName, dbName); err != nil {
return nil, err
}
switch driver {
case "postgres":
engine, err = xorm.NewEngine(driver, dataSourceName+" dbname="+dbName)
case "sqlite3":
engine, err = xorm.NewEngine(driver, dataSourceName)
default:
engine, err = xorm.NewEngine(driver, dataSourceName+dbName)
}
if err != nil {
return nil, err
}
db := &DB{
engine: engine,
name: dbName,
}
if err := db.initDB(beans); err != nil {
err := db.Close()
if err != nil {
return nil, err
}
return nil, err
}
return db, nil
}
func NewCustomizePrefixDB(driver string, dataSourceName string, dbName string, databasePrefix string, beans ...interface{}) (*DB, error) {
var engine *xorm.Engine
var err error
dbName = databasePrefix + dbName
if err := createDatabase(driver, dataSourceName, dbName); err != nil {
return nil, err
}
switch driver {
case "postgres":
engine, err = xorm.NewEngine(driver, dataSourceName+" dbname="+dbName)
case "sqlite3":
engine, err = xorm.NewEngine(driver, dataSourceName)
default:
engine, err = xorm.NewEngine(driver, dataSourceName+dbName)
}
if err != nil {
return nil, err
}
db := &DB{
engine: engine,
name: dbName,
}
if err := db.initDB(beans); err != nil {
err := db.Close()
if err != nil {
return nil, err
}
return nil, err
}
return db, nil
}
func createDatabase(driver string, dataSourceName string, dbName string) error {
var err error
var db *sql.DB
if driver == "postgres" {
db, err = sql.Open(driver, dataSourceName+" dbname=postgres")
} else {
db, err = sql.Open(driver, dataSourceName)
}
if err != nil {
return err
}
defer db.Close()
if driver == "postgres" {
if _, err = db.Exec("CREATE DATABASE " + dbName); err != nil {
if pqerr, ok := err.(*pq.Error); ok && pqerr.Code == "42P04" {
return nil
}
}
} else if driver != "sqlite3" {
_, err = db.Exec("CREATE DATABASE IF NOT EXISTS " + dbName)
if err != nil {
return err
}
}
return nil
}
func dropDatabase(driver string, dataSourceName string, dbName string) error {
var err error
var db *sql.DB
if driver == "postgres" {
db, err = sql.Open(driver, dataSourceName+" dbname=postgres")
} else {
db, err = sql.Open(driver, dataSourceName)
}
if err != nil {
return err
}
defer db.Close()
if driver == "sqlite3" {
err = os.Remove(dataSourceName)
} else {
_, err = db.Exec("DROP DATABASE " + dbName)
}
return err
}
func getDBNameWithPrefix(dbName string) string {
ts := time.Now().UnixNano()
return fmt.Sprintf("%s_%d", dbName, ts)
}