enable identity column insert optionally for mssql ref: https://github.com/jinzhu/gorm/issues/647

main.go

@@ -451,6 +451,7 @@ func (s *DB) CurrentDatabase() string {
 	return name
 }
 
+
 /*
 Add foreign key to the given scope
 
@@ -550,3 +551,7 @@ func (s *DB) GetErrors() (errors []error) {
 	}
 	return
 }
+
+func (s *DB) EnableIdentityInsert(db *DB, tableName  string) *DB {
+	return s.dialect.EnableIdentityInsert(db, tableName)
+}