Simple and Powerful ORM for Go, support mysql,postgres,tidb,sqlite3,sqlite,mssql,oracle,cockroach
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// Copyright 2019 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package schemas
import (
// PK represents primary key values
type PK []interface{}
// NewPK creates primay keys
func NewPK(pks ...interface{}) *PK {
p := PK(pks)
return &p
// IsZero return true if primay keys are zero
func (p *PK) IsZero() bool {
for _, k := range *p {
if utils.IsZero(k) {
return true
return false
// ToString convert to SQL string
func (p *PK) ToString() (string, error) {
buf := new(bytes.Buffer)
enc := gob.NewEncoder(buf)
err := enc.Encode(*p)
return buf.String(), err
// FromString reads content to load primary keys
func (p *PK) FromString(content string) error {
dec := gob.NewDecoder(bytes.NewBufferString(content))
err := dec.Decode(p)
return err