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Replace many2many associations with empty

This commit is contained in:
Jinzhu 2015-09-30 21:30:58 +08:00
parent a480621b76
commit 58596afda1
2 changed files with 12 additions and 7 deletions
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14
association.go
View File

@ -139,18 +139,18 @@ func (association *Association) Replace(values ...interface{}) *Association {
addedPrimaryKeys = append(addedPrimaryKeys, primaryKey)
}
if len(addedPrimaryKeys) > 0 {
query := scope.NewDB()
for idx, foreignKey := range relationship.ForeignDBNames {
if field, ok := scope.FieldByName(relationship.ForeignFieldNames[idx]); ok {
query = query.Where(fmt.Sprintf("%v = ?", scope.Quote(foreignKey)), field.Field.Interface())
}
query := scope.NewDB()
for idx, foreignKey := range relationship.ForeignDBNames {
if field, ok := scope.FieldByName(relationship.ForeignFieldNames[idx]); ok {
query = query.Where(fmt.Sprintf("%v = ?", scope.Quote(foreignKey)), field.Field.Interface())
}
}
if len(addedPrimaryKeys) > 0 {
sql := fmt.Sprintf("%v NOT IN (%v)", toQueryCondition(scope, relationship.AssociationForeignDBNames), toQueryMarks(addedPrimaryKeys))
query = query.Where(sql, toQueryValues(addedPrimaryKeys)...)
association.setErr(relationship.JoinTableHandler.Delete(relationship.JoinTableHandler, query, relationship))
}
association.setErr(relationship.JoinTableHandler.Delete(relationship.JoinTableHandler, query, relationship))
} else {
association.setErr(errors.New("replace only support many to many"))
}

5
association_test.go
View File

@ -211,6 +211,11 @@ func TestManyToMany(t *testing.T) {
t.Errorf("Relations should be replaced")
}
DB.Model(&user).Association("Languages").Replace()
if len(user.Languages) != 0 || DB.Model(&user).Association("Languages").Count() != 0 {
t.Errorf("Relations should be replaced with empty")
}
DB.Model(&user).Association("Languages").Replace(&[]Language{{Name: "FF"}, {Name: "JJ"}})
if len(user.Languages) != 2 || DB.Model(&user).Association("Languages").Count() != len([]string{"FF", "JJ"}) {
t.Errorf("Relations should be replaced")