// new a db manager according to the parameter. Currently support four
// drivers
func NewEngine(driverName string, dataSourceName string) (*Engine, error) {
regDrvsNDialects()
driver := core.QueryDriver(driverName)
if driver == nil {
return nil, errors.New(fmt.Sprintf("Unsupported driver name: %v", driverName))
}
uri, err := driver.Parse(driverName, dataSourceName)
if err != nil {
return nil, err
}
dialect := core.QueryDialect(uri.DbType)
if dialect == nil {
return nil, errors.New(fmt.Sprintf("Unsupported dialect type: %v", uri.DbType))
}
db, err := core.Open(driverName, dataSourceName)
if err != nil {
return nil, err
}
err = dialect.Init(db, uri, driverName, dataSourceName)
if err != nil {
return nil, err
}
engine := &Engine{
db: db,
dialect: dialect,
Tables: make(map[reflect.Type]*core.Table),
mutex: &sync.RWMutex{},
TagIdentifier: "xorm",
Logger: NewSimpleLogger(os.Stdout),
TZLocation: time.Local,
}
engine.SetMapper(core.NewCacheMapper(new(core.SnakeMapper)))
//engine.Filters = dialect.Filters()
//engine.Cacher = NewLRUCacher()
//err = engine.SetPool(NewSysConnectPool())
runtime.SetFinalizer(engine, close)
return engine, err
}
// NewEngine new a db manager according to the parameter. Currently support four
// drivers
func NewEngine(driverName string, dataSourceName string) (*Engine, error) {
regDrvsNDialects()
driver := core.QueryDriver(driverName)
if driver == nil {
return nil, fmt.Errorf("Unsupported driver name: %v", driverName)
}
uri, err := driver.Parse(driverName, dataSourceName)
if err != nil {
return nil, err
}
dialect := core.QueryDialect(uri.DbType)
if dialect == nil {
return nil, fmt.Errorf("Unsupported dialect type: %v", uri.DbType)
}
db, err := core.Open(driverName, dataSourceName)
if err != nil {
return nil, err
}
err = dialect.Init(db, uri, driverName, dataSourceName)
if err != nil {
return nil, err
}
engine := &Engine{
db: db,
dialect: dialect,
Tables: make(map[reflect.Type]*core.Table),
mutex: &sync.RWMutex{},
TagIdentifier: "xorm",
TZLocation: time.Local,
}
logger := NewSimpleLogger(os.Stdout)
logger.SetLevel(core.LOG_INFO)
engine.SetLogger(logger)
engine.SetMapper(core.NewCacheMapper(new(core.SnakeMapper)))
runtime.SetFinalizer(engine, close)
return engine, nil
}
// DumpAll dump database all table structs and data to w with specify db type
func (engine *Engine) dumpTables(tables []*core.Table, w io.Writer, tp ...core.DbType) error {
var dialect core.Dialect
if len(tp) == 0 {
dialect = engine.dialect
} else {
dialect = core.QueryDialect(tp[0])
if dialect == nil {
return errors.New("Unsupported database type.")
}
dialect.Init(nil, engine.dialect.URI(), "", "")
}
_, err := io.WriteString(w, fmt.Sprintf("/*Generated by xorm v%s %s, from %s to %s*/\n\n",
Version, time.Now().In(engine.TZLocation).Format("2006-01-02 15:04:05"), engine.dialect.DBType(), dialect.DBType()))
if err != nil {
return err
}
for i, table := range tables {
if i > 0 {
_, err = io.WriteString(w, "\n")
if err != nil {
return err
}
}
_, err = io.WriteString(w, dialect.CreateTableSql(table, "", table.StoreEngine, "")+";\n")
if err != nil {
return err
}
for _, index := range table.Indexes {
_, err = io.WriteString(w, dialect.CreateIndexSql(table.Name, index)+";\n")
if err != nil {
return err
}
}
rows, err := engine.DB().Query("SELECT * FROM " + engine.Quote(table.Name))
if err != nil {
return err
}
defer rows.Close()
cols, err := rows.Columns()
if err != nil {
return err
}
if len(cols) == 0 {
continue
}
for rows.Next() {
dest := make([]interface{}, len(cols))
err = rows.ScanSlice(&dest)
if err != nil {
return err
}
_, err = io.WriteString(w, "INSERT INTO "+dialect.Quote(table.Name)+" ("+dialect.Quote(strings.Join(cols, dialect.Quote(", ")))+") VALUES (")
if err != nil {
return err
}
var temp string
for i, d := range dest {
col := table.GetColumn(cols[i])
if d == nil {
temp += ", NULL"
} else if col.SQLType.IsText() || col.SQLType.IsTime() {
var v = fmt.Sprintf("%s", d)
if strings.HasSuffix(v, " +0000 UTC") {
temp += fmt.Sprintf(", '%s'", v[0:len(v)-len(" +0000 UTC")])
} else {
temp += ", '" + strings.Replace(v, "'", "''", -1) + "'"
}
} else if col.SQLType.IsBlob() {
if reflect.TypeOf(d).Kind() == reflect.Slice {
temp += fmt.Sprintf(", %s", dialect.FormatBytes(d.([]byte)))
} else if reflect.TypeOf(d).Kind() == reflect.String {
temp += fmt.Sprintf(", '%s'", d.(string))
}
} else if col.SQLType.IsNumeric() {
switch reflect.TypeOf(d).Kind() {
case reflect.Slice:
temp += fmt.Sprintf(", %s", string(d.([]byte)))
default:
temp += fmt.Sprintf(", %v", d)
}
} else {
s := fmt.Sprintf("%v", d)
if strings.Contains(s, ":") || strings.Contains(s, "-") {
if strings.HasSuffix(s, " +0000 UTC") {
temp += fmt.Sprintf(", '%s'", s[0:len(s)-len(" +0000 UTC")])
} else {
temp += fmt.Sprintf(", '%s'", s)
}
} else {
temp += fmt.Sprintf(", %s", s)
}
}
}
_, err = io.WriteString(w, temp[2:]+");\n")
if err != nil {
return err
}
}
}
return nil
}