Upgrade xorm to v1.1.0 (#15869)

vendor/xorm.io/xorm/schemas/pk.go

@@ -11,13 +11,16 @@ import (
 	"xorm.io/xorm/internal/utils"
 )
 
+// 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) {
@@ -27,6 +30,7 @@ func (p *PK) IsZero() bool {
 	return false
 }
 
+// ToString convert to SQL string
 func (p *PK) ToString() (string, error) {
 	buf := new(bytes.Buffer)
 	enc := gob.NewEncoder(buf)
@@ -34,6 +38,7 @@ func (p *PK) ToString() (string, error) {
 	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)