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Add Scope.addForeignKey()

This commit is contained in:
sendyHalim 2015-02-07 18:04:10 +07:00
parent b33f30714b
commit a8b3e8d3e2
2 changed files with 25 additions and 0 deletions
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11
main.go
View File

@ -400,6 +400,17 @@ func (s *DB) AddIndex(indexName string, column ...string) *DB {
return s
}
/*
Add foreign key to the given scope
Example:
db.Model(&User{}).AddForeignKey("city_id", "cities(id)", "RESTRICT", "RESTRICT")
*/
func (s *DB) AddForeignKey(field string, dest string, onDelete string, onUpdate string) *DB {
s.clone().NewScope(s.Value).addForeignKey(field, dest, onDelete, onUpdate)
return s
}
func (s *DB) AddUniqueIndex(indexName string, column ...string) *DB {
s.clone().NewScope(s.Value).addIndex(true, indexName, column...)
return s

14
scope_private.go
View File

@ -630,6 +630,20 @@ func (scope *Scope) addIndex(unique bool, indexName string, column ...string) {
scope.Raw(fmt.Sprintf("%s %v ON %v(%v);", sqlCreate, indexName, scope.QuotedTableName(), strings.Join(columns, ", "))).Exec()
}
func (scope *Scope) addForeignKey(field string, dest string, onDelete string, onUpdate string) {
var table string = scope.TableName()
var keyName string = fmt.Sprintf("%s_%s_foreign", table, field)
var query string = `
ALTER TABLE %s
ADD CONSTRAINT %s
FOREIGN KEY (%s)
REFERENCES %s
ON DELETE %s
ON UPDATE %s;
`
scope.Raw(fmt.Sprintf(query, table, keyName, field, dest, onDelete, onUpdate)).Exec()
}
func (scope *Scope) removeIndex(indexName string) {
scope.Dialect().RemoveIndex(scope, indexName)
}