TODO: 2
This commit is contained in:
eson
parent
2236e13af7
commit
83dcdf86c9
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@ -2,8 +2,11 @@ package intimate
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import (
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"database/sql"
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"encoding/binary"
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"fmt"
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"log"
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"reflect"
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"strconv"
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"testing"
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)
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@ -38,13 +41,209 @@ func (store *Store) Table(name string) *Table {
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table.insertsql = `INSERT INTO ` + table.name + `(%s) values(%s)`
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table.updatesql = `UPDATE ` + table.name + ` SET %s WHERE %s = ?`
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// table.selectsql = `FROM ` + table.name + `WHERE operator`
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return table
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}
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type Queue struct {
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table *Table
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obj reflect.Type
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table *Table
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obj reflect.Type
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selected string
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condition string
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uidname string
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uididx int
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}
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type OperatorType string
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const (
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OP_OK OperatorType = "0"
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OP_WAIT OperatorType = "1000"
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OP_ERROR OperatorType = "10000"
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)
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func (queue *Queue) Pop() (result interface{}, err error) {
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db := queue.table.store.db
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tx, err := db.Begin()
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if err != nil {
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return nil, err
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}
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defer func() {
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cerr := tx.Commit()
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if cerr != nil {
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log.Println(cerr)
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log.Println(tx.Rollback())
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}
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}()
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selectsql := `SELECT ` + queue.selected + ` FROM ` + queue.table.name + ` WHERE ` + queue.condition + " limit 1 for update"
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rows, err := tx.Query(selectsql)
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// err = rows.Err()
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if err != nil {
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return nil, fmt.Errorf("table: %s queue is empty", queue.table.name)
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}
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var fields = make([]interface{}, queue.obj.NumField())
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for i := range fields {
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var iv interface{}
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fields[i] = &iv
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}
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// if !rows.Next() {
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// return nil, fmt.Errorf("table: %s queue is empty", queue.table.name)
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// }
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if rows.Next() {
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err = rows.Scan(fields...)
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if err != nil {
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return nil, err
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}
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}
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columntypes, err := rows.ColumnTypes()
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if err != nil {
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return nil, err
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}
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if err = rows.Close(); err != nil {
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return nil, err
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}
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_, err = tx.Exec("UPDATE "+queue.table.name+" SET operator = "+string(OP_WAIT)+" WHERE "+queue.uidname+" = ?", fields[queue.uididx])
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if err != nil {
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log.Println(err)
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return nil, err
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}
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obj := reflect.New(queue.obj).Elem()
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for i := 0; i < obj.NumField(); i++ {
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field := obj.Field(i)
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convert(*fields[i].(*interface{}), field, columntypes[i])
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// if field.Type().Kind() == reflect.Ptr {
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// field.Elem().Set(reflect.ValueOf(*fields[i].(*interface{})))
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// continue
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// }
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// field.Set(reflect.ValueOf(*fields[i].(*interface{})))
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}
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return obj.Interface(), err
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}
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func TestAutoStore(t *testing.T) {
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uri := "root:@tcp(127.0.0.1:4000)/test?parseTime=true&loc=Local&charset=utf8mb4&collation=utf8mb4_unicode_ci"
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store := NewStore(uri)
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queue := store.Table("streamer").Queue(TSreamer{}, "operator = 0")
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t.Error(queue.Pop())
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streamer := &TSreamer{}
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streamer.Uid = 2
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streamer.UserID = &sql.NullString{String: "xixi", Valid: true}
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streamer.Name = "streamer"
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streamer.Operator = 0
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streamer.Ext = &sql.NullString{String: "ext", Valid: true}
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err := store.Table("streamer").Insert(streamer)
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if err != nil {
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t.Error(err)
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}
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}
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func convert(dest interface{}, field reflect.Value, columntype *sql.ColumnType) error {
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log.Println("type:", field.Type(), ",kind:", field.Kind(), ",field:", field)
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if field.Kind() == reflect.Ptr {
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fn := field.Type().Elem().Name() // New 一个 field.Type().Elem() . 然后判断 columntype 转化 成 NullString Time
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field = field.Elem() //
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log.Println("type:", fn, ",kind:", field.Kind(), ",field:", field)
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}
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if field.Kind() == reflect.Interface {
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}
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// log.Println(field.Kind(), field, reflect.TypeOf(field).Elem().Name(), columntype.ScanType().Kind())
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switch fv := field.Kind(); fv {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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if dest == nil {
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return fmt.Errorf("converting NULL to %s is unsupported", field.Kind())
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}
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log.Println(binary.Varint(dest.([]byte)))
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s := asString(dest)
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i64, err := strconv.ParseInt(s, 10, field.Type().Bits())
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if err != nil {
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err = strconvErr(err)
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return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", dest, s, field.Kind(), err)
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}
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field.SetInt(i64)
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return nil
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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if dest == nil {
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return fmt.Errorf("converting NULL to %s is unsupported", field.Kind())
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}
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s := asString(dest)
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u64, err := strconv.ParseUint(s, 10, field.Type().Bits())
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if err != nil {
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err = strconvErr(err)
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return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", dest, s, field.Kind(), err)
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}
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field.SetUint(u64)
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return nil
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case reflect.Float32, reflect.Float64:
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if dest == nil {
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return fmt.Errorf("converting NULL to %s is unsupported", field.Kind())
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}
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s := asString(dest)
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f64, err := strconv.ParseFloat(s, field.Type().Bits())
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if err != nil {
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err = strconvErr(err)
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return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", dest, s, field.Kind(), err)
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}
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field.SetFloat(f64)
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return nil
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case reflect.String:
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if dest == nil {
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return fmt.Errorf("converting NULL to %s is unsupported", field.Kind())
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}
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switch v := dest.(type) {
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case string:
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field.SetString(v)
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return nil
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case []byte:
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field.SetString(string(v))
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return nil
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}
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default:
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// log.Println(fv, columntype.ScanType().Kind())
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}
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return nil
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}
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func (t *Table) Queue(obj interface{}, whereCondition string) *Queue {
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q := &Queue{}
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q.condition = whereCondition
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q.obj = reflect.TypeOf(obj)
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q.table = t
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for i := 0; i < q.obj.NumField(); i++ {
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field := q.obj.Field(i)
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if fname, ok := field.Tag.Lookup("field"); ok {
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q.selected += fname + ","
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if _, ok := field.Tag.Lookup("uid"); ok {
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q.uididx = i
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q.uidname = fname
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}
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}
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}
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q.selected = q.selected[:len(q.selected)-1]
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return q
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}
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func (t *Table) Insert(obj interface{}) error {
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@ -140,24 +339,10 @@ func (t *Table) Update(obj interface{}) error {
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}
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type TSreamer struct {
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Uid int `field:"uid" uid:"auto"`
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Name interface{} `field:"name"`
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UserID *sql.NullString `field:"userid"`
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Ext *sql.NullString `field:"ext"`
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Iface interface{} `field:"tag"`
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}
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func TestAutoStore(t *testing.T) {
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uri := "root:@tcp(127.0.0.1:4000)/test?parseTime=true&loc=Local&charset=utf8mb4&collation=utf8mb4_unicode_ci"
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store := NewStore(uri)
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streamer := &TSreamer{}
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streamer.Uid = 2
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streamer.UserID = nil
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streamer.Name = "streamer"
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streamer.Ext = &sql.NullString{String: "ext", Valid: true}
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err := store.Table("streamer").Update(streamer)
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if err != nil {
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t.Error(err)
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}
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Uid int `field:"uid" uid:"auto"`
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Name interface{} `field:"name"`
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UserID *sql.NullString `field:"userid"`
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Ext *sql.NullString `field:"ext"`
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Iface interface{} `field:"tag"`
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Operator int `field:"operator"`
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}
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378
convert.go
Normal file
378
convert.go
Normal file
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@ -0,0 +1,378 @@
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// Copyright 2011 The Go 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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// Type conversions for Scan.
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package intimate
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import (
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"database/sql"
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"database/sql/driver"
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"errors"
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"fmt"
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"reflect"
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"strconv"
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"time"
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)
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var errNilPtr = errors.New("destination pointer is nil") // embedded in descriptive error
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// convertAssignRows copies to dest the value in src, converting it if possible.
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// An error is returned if the copy would result in loss of information.
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// dest should be a pointer type. If rows is passed in, the rows will
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// be used as the parent for any cursor values converted from a
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// driver.Rows to a *Rows.
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func convertAssignRows(dest, src interface{}, rows *sql.Rows) error {
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// Common cases, without reflect.
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switch s := src.(type) {
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case string:
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switch d := dest.(type) {
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case *string:
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if d == nil {
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return errNilPtr
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}
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*d = s
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return nil
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case *[]byte:
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if d == nil {
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return errNilPtr
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}
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*d = []byte(s)
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return nil
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case *sql.RawBytes:
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if d == nil {
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return errNilPtr
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}
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*d = append((*d)[:0], s...)
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return nil
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}
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case []byte:
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switch d := dest.(type) {
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case *string:
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if d == nil {
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return errNilPtr
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}
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*d = string(s)
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return nil
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case *interface{}:
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if d == nil {
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return errNilPtr
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}
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*d = cloneBytes(s)
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return nil
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case *[]byte:
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if d == nil {
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return errNilPtr
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}
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*d = cloneBytes(s)
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return nil
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case *sql.RawBytes:
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if d == nil {
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return errNilPtr
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}
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*d = s
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return nil
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}
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case time.Time:
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switch d := dest.(type) {
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case *time.Time:
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*d = s
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return nil
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case *string:
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*d = s.Format(time.RFC3339Nano)
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return nil
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case *[]byte:
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if d == nil {
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return errNilPtr
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}
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*d = []byte(s.Format(time.RFC3339Nano))
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return nil
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case *sql.RawBytes:
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if d == nil {
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return errNilPtr
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}
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*d = s.AppendFormat((*d)[:0], time.RFC3339Nano)
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return nil
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}
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case decimalDecompose:
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switch d := dest.(type) {
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case decimalCompose:
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return d.Compose(s.Decompose(nil))
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}
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case nil:
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switch d := dest.(type) {
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case *interface{}:
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if d == nil {
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return errNilPtr
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}
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*d = nil
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return nil
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case *[]byte:
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if d == nil {
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return errNilPtr
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}
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*d = nil
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return nil
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case *sql.RawBytes:
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if d == nil {
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return errNilPtr
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}
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*d = nil
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return nil
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}
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// The driver is returning a cursor the client may iterate over.
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}
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var sv reflect.Value
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switch d := dest.(type) {
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case *string:
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sv = reflect.ValueOf(src)
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switch sv.Kind() {
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case reflect.Bool,
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reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
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reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
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reflect.Float32, reflect.Float64:
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*d = asString(src)
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return nil
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}
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case *[]byte:
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sv = reflect.ValueOf(src)
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if b, ok := asBytes(nil, sv); ok {
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*d = b
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return nil
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}
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case *sql.RawBytes:
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sv = reflect.ValueOf(src)
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if b, ok := asBytes([]byte(*d)[:0], sv); ok {
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*d = sql.RawBytes(b)
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return nil
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}
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case *bool:
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bv, err := driver.Bool.ConvertValue(src)
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if err == nil {
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*d = bv.(bool)
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}
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return err
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case *interface{}:
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*d = src
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return nil
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}
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if scanner, ok := dest.(sql.Scanner); ok {
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return scanner.Scan(src)
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}
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dpv := reflect.ValueOf(dest)
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if dpv.Kind() != reflect.Ptr {
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return errors.New("destination not a pointer")
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}
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if dpv.IsNil() {
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return errNilPtr
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}
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if !sv.IsValid() {
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sv = reflect.ValueOf(src)
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}
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dv := reflect.Indirect(dpv)
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if sv.IsValid() && sv.Type().AssignableTo(dv.Type()) {
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switch b := src.(type) {
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case []byte:
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dv.Set(reflect.ValueOf(cloneBytes(b)))
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default:
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dv.Set(sv)
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}
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return nil
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}
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if dv.Kind() == sv.Kind() && sv.Type().ConvertibleTo(dv.Type()) {
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dv.Set(sv.Convert(dv.Type()))
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return nil
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}
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// The following conversions use a string value as an intermediate representation
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// to convert between various numeric types.
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//
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// This also allows scanning into user defined types such as "type Int int64".
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// For symmetry, also check for string destination types.
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switch dv.Kind() {
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case reflect.Ptr:
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if src == nil {
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dv.Set(reflect.Zero(dv.Type()))
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return nil
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}
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dv.Set(reflect.New(dv.Type().Elem()))
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return convertAssignRows(dv.Interface(), src, rows)
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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if src == nil {
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return fmt.Errorf("converting NULL to %s is unsupported", dv.Kind())
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}
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s := asString(src)
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i64, err := strconv.ParseInt(s, 10, dv.Type().Bits())
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if err != nil {
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err = strconvErr(err)
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return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
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}
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dv.SetInt(i64)
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return nil
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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if src == nil {
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return fmt.Errorf("converting NULL to %s is unsupported", dv.Kind())
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}
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s := asString(src)
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u64, err := strconv.ParseUint(s, 10, dv.Type().Bits())
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if err != nil {
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err = strconvErr(err)
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return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
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}
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dv.SetUint(u64)
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return nil
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case reflect.Float32, reflect.Float64:
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if src == nil {
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return fmt.Errorf("converting NULL to %s is unsupported", dv.Kind())
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}
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s := asString(src)
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f64, err := strconv.ParseFloat(s, dv.Type().Bits())
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if err != nil {
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err = strconvErr(err)
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return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
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}
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dv.SetFloat(f64)
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return nil
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case reflect.String:
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if src == nil {
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return fmt.Errorf("converting NULL to %s is unsupported", dv.Kind())
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}
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switch v := src.(type) {
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case string:
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dv.SetString(v)
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return nil
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case []byte:
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||||
dv.SetString(string(v))
|
||||
return nil
|
||||
}
|
||||
}
|
||||
|
||||
return fmt.Errorf("unsupported Scan, storing driver.Value type %T into type %T", src, dest)
|
||||
}
|
||||
|
||||
func strconvErr(err error) error {
|
||||
if ne, ok := err.(*strconv.NumError); ok {
|
||||
return ne.Err
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
func cloneBytes(b []byte) []byte {
|
||||
if b == nil {
|
||||
return nil
|
||||
}
|
||||
c := make([]byte, len(b))
|
||||
copy(c, b)
|
||||
return c
|
||||
}
|
||||
|
||||
func asString(src interface{}) string {
|
||||
switch v := src.(type) {
|
||||
case string:
|
||||
return v
|
||||
case []byte:
|
||||
return string(v)
|
||||
}
|
||||
rv := reflect.ValueOf(src)
|
||||
switch rv.Kind() {
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
return strconv.FormatInt(rv.Int(), 10)
|
||||
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
||||
return strconv.FormatUint(rv.Uint(), 10)
|
||||
case reflect.Float64:
|
||||
return strconv.FormatFloat(rv.Float(), 'g', -1, 64)
|
||||
case reflect.Float32:
|
||||
return strconv.FormatFloat(rv.Float(), 'g', -1, 32)
|
||||
case reflect.Bool:
|
||||
return strconv.FormatBool(rv.Bool())
|
||||
}
|
||||
return fmt.Sprintf("%v", src)
|
||||
}
|
||||
|
||||
func asBytes(buf []byte, rv reflect.Value) (b []byte, ok bool) {
|
||||
switch rv.Kind() {
|
||||
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
||||
return strconv.AppendInt(buf, rv.Int(), 10), true
|
||||
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
||||
return strconv.AppendUint(buf, rv.Uint(), 10), true
|
||||
case reflect.Float32:
|
||||
return strconv.AppendFloat(buf, rv.Float(), 'g', -1, 32), true
|
||||
case reflect.Float64:
|
||||
return strconv.AppendFloat(buf, rv.Float(), 'g', -1, 64), true
|
||||
case reflect.Bool:
|
||||
return strconv.AppendBool(buf, rv.Bool()), true
|
||||
case reflect.String:
|
||||
s := rv.String()
|
||||
return append(buf, s...), true
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
var valuerReflectType = reflect.TypeOf((*driver.Valuer)(nil)).Elem()
|
||||
|
||||
// callValuerValue returns vr.Value(), with one exception:
|
||||
// If vr.Value is an auto-generated method on a pointer type and the
|
||||
// pointer is nil, it would panic at runtime in the panicwrap
|
||||
// method. Treat it like nil instead.
|
||||
// Issue 8415.
|
||||
//
|
||||
// This is so people can implement driver.Value on value types and
|
||||
// still use nil pointers to those types to mean nil/NULL, just like
|
||||
// string/*string.
|
||||
//
|
||||
// This function is mirrored in the database/sql/driver package.
|
||||
func callValuerValue(vr driver.Valuer) (v driver.Value, err error) {
|
||||
if rv := reflect.ValueOf(vr); rv.Kind() == reflect.Ptr &&
|
||||
rv.IsNil() &&
|
||||
rv.Type().Elem().Implements(valuerReflectType) {
|
||||
return nil, nil
|
||||
}
|
||||
return vr.Value()
|
||||
}
|
||||
|
||||
// decimal composes or decomposes a decimal value to and from individual parts.
|
||||
// There are four parts: a boolean negative flag, a form byte with three possible states
|
||||
// (finite=0, infinite=1, NaN=2), a base-2 big-endian integer
|
||||
// coefficient (also known as a significand) as a []byte, and an int32 exponent.
|
||||
// These are composed into a final value as "decimal = (neg) (form=finite) coefficient * 10 ^ exponent".
|
||||
// A zero length coefficient is a zero value.
|
||||
// The big-endian integer coefficient stores the most significant byte first (at coefficient[0]).
|
||||
// If the form is not finite the coefficient and exponent should be ignored.
|
||||
// The negative parameter may be set to true for any form, although implementations are not required
|
||||
// to respect the negative parameter in the non-finite form.
|
||||
//
|
||||
// Implementations may choose to set the negative parameter to true on a zero or NaN value,
|
||||
// but implementations that do not differentiate between negative and positive
|
||||
// zero or NaN values should ignore the negative parameter without error.
|
||||
// If an implementation does not support Infinity it may be converted into a NaN without error.
|
||||
// If a value is set that is larger than what is supported by an implementation,
|
||||
// an error must be returned.
|
||||
// Implementations must return an error if a NaN or Infinity is attempted to be set while neither
|
||||
// are supported.
|
||||
//
|
||||
// NOTE(kardianos): This is an experimental interface. See https://golang.org/issue/30870
|
||||
type decimal interface {
|
||||
decimalDecompose
|
||||
decimalCompose
|
||||
}
|
||||
|
||||
type decimalDecompose interface {
|
||||
// Decompose returns the internal decimal state in parts.
|
||||
// If the provided buf has sufficient capacity, buf may be returned as the coefficient with
|
||||
// the value set and length set as appropriate.
|
||||
Decompose(buf []byte) (form byte, negative bool, coefficient []byte, exponent int32)
|
||||
}
|
||||
|
||||
type decimalCompose interface {
|
||||
// Compose sets the internal decimal value from parts. If the value cannot be
|
||||
// represented then an error should be returned.
|
||||
Compose(form byte, negative bool, coefficient []byte, exponent int32) error
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user