fix #1802

orm/db.go

@@ -634,18 +634,36 @@ func (d *dbBase) Update(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.
 
 // execute delete sql dbQuerier with given struct reflect.Value.
 // delete index is pk.
-func (d *dbBase) Delete(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.Location) (int64, error) {
+func (d *dbBase) Delete(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.Location, cols []string) (int64, error) {
-	pkName, pkValue, ok := getExistPk(mi, ind)
+	var whereCols []string
+	var args []interface{}
+	// if specify cols length > 0, then use it for where condition.
+	if len(cols) > 0 {
+		var err error
+		whereCols = make([]string, 0, len(cols))
+		args, _, err = d.collectValues(mi, ind, cols, false, false, &whereCols, tz)
+		if err != nil {
+			return 0, err
+		}
+	} else {
+		// default use pk value as where condtion.
+		pkColumn, pkValue, ok := getExistPk(mi, ind)
 		if ok == false {
 			return 0, ErrMissPK
 		}
+		whereCols = []string{pkColumn}
+		args = append(args, pkValue)
+	}
 
 	Q := d.ins.TableQuote()
 
-	query := fmt.Sprintf("DELETE FROM %s%s%s WHERE %s%s%s = ?", Q, mi.table, Q, Q, pkName, Q)
+	sep := fmt.Sprintf("%s = ? AND %s", Q, Q)
+	wheres := strings.Join(whereCols, sep)
+
+	query := fmt.Sprintf("DELETE FROM %s%s%s WHERE %s%s%s = ?", Q, mi.table, Q, Q, wheres, Q)
 
 	d.ins.ReplaceMarks(&query)
-	res, err := q.Exec(query, pkValue)
+	res, err := q.Exec(query, args...)
 	if err == nil {
 		num, err := res.RowsAffected()
 		if err != nil {
@@ -659,7 +677,7 @@ func (d *dbBase) Delete(q dbQuerier, mi *modelInfo, ind reflect.Value, tz *time.
 					ind.FieldByIndex(mi.fields.pk.fieldIndex).SetInt(0)
 				}
 			}
-			err := d.deleteRels(q, mi, []interface{}{pkValue}, tz)
+			err := d.deleteRels(q, mi, args, tz)
 			if err != nil {
 				return num, err
 			}

orm/orm.go

@@ -234,9 +234,10 @@ func (o *orm) Update(md interface{}, cols ...string) (int64, error) {
 }
 
 // delete model in database
-func (o *orm) Delete(md interface{}) (int64, error) {
+// cols shows the delete conditions values read from. deafult is pk
+func (o *orm) Delete(md interface{}, cols ...string) (int64, error) {
 	mi, ind := o.getMiInd(md, true)
-	num, err := o.alias.DbBaser.Delete(o.db, mi, ind, o.alias.TZ)
+	num, err := o.alias.DbBaser.Delete(o.db, mi, ind, o.alias.TZ,cols)
 	if err != nil {
 		return num, err
 	}

orm/orm_test.go

@@ -577,6 +577,10 @@ func TestCRUD(t *testing.T) {
 	err = dORM.Read(&ub)
 	throwFail(t, err)
 	throwFail(t, AssertIs(ub.Name, "name"))
+
+	num, err = dORM.Delete(&ub, "name")
+	throwFail(t, err)
+	throwFail(t, AssertIs(num, 1))
 }
 
 func TestInsertTestData(t *testing.T) {

orm/types.go

@@ -71,7 +71,7 @@ type Ormer interface {
 	//	num, err = Ormer.Update(&user, "Langs", "Extra")
 	Update(md interface{}, cols ...string) (int64, error)
 	// delete model in database
-	Delete(md interface{}) (int64, error)
+	Delete(md interface{}, cols ...string) (int64, error)
 	// load related models to md model.
 	// args are limit, offset int and order string.
 	//
@@ -401,7 +401,7 @@ type dbBaser interface {
 	InsertValue(dbQuerier, *modelInfo, bool, []string, []interface{}) (int64, error)
 	InsertStmt(stmtQuerier, *modelInfo, reflect.Value, *time.Location) (int64, error)
 	Update(dbQuerier, *modelInfo, reflect.Value, *time.Location, []string) (int64, error)
-	Delete(dbQuerier, *modelInfo, reflect.Value, *time.Location) (int64, error)
+	Delete(dbQuerier, *modelInfo, reflect.Value, *time.Location, []string) (int64, error)
 	ReadBatch(dbQuerier, *querySet, *modelInfo, *Condition, interface{}, *time.Location, []string) (int64, error)
 	SupportUpdateJoin() bool
 	UpdateBatch(dbQuerier, *querySet, *modelInfo, *Condition, Params, *time.Location) (int64, error)