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strings.go
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strings.go
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package types
import (
"bytes"
"database/sql/driver"
"encoding/csv"
"errors"
"reflect"
"github.com/go-aorm/aorm"
)
type (
Strings []string
StringsAssigner struct {
}
)
func (this *Strings) Append(value ...string) {
*this = append(*this, value...)
}
func (this Strings) Value() (driver.Value, error) {
var (
w bytes.Buffer
cw = csv.NewWriter(&w)
)
if err := cw.Write(this); err != nil {
return nil, err
}
cw.Flush()
return w.String(), nil
}
func (this *Strings) Scan(src interface{}) (err error) {
*this = nil
if src == nil {
return nil
}
var s string
switch t := src.(type) {
case string:
s = t
goto set
case []byte:
s = string(t)
goto set
default:
return errors.New("bad source type")
}
set:
if s == "" {
return
}
var v []string
if v, err = csv.NewReader(bytes.NewBufferString(s)).Read(); err == nil {
*this = v
}
return
}
func init() {
aorm.Register(StringsAssigner{})
}
func (this Strings) PrimaryGoValue() interface{} {
return []string{}
}
func (this Strings) IsZero() bool {
return len(this) == 0
}
func (StringsAssigner) Valuer(_ aorm.Dialector, value interface{}) driver.Valuer {
return value.(Strings)
}
func (StringsAssigner) Scaner(_ *aorm.Scope, dest *aorm.Field) aorm.Scanner {
return dest.Field.Interface().(*Strings)
}
func (StringsAssigner) SQLType(*aorm.StructField, aorm.Dialector) (string, string) {
return "TEXT", ""
}
func (StringsAssigner) SQLSize(_ aorm.Dialector) int {
return 0
}
func (StringsAssigner) Type() reflect.Type {
return reflect.TypeOf(Strings{})
}