Merge pull request #184 from shirou/master

Add DropTableIfExists

README.md

@@ -124,6 +124,9 @@ db.CreateTable(User{})
 // Drop table
 db.DropTable(User{})
 
+// Drop table if exists
+db.DropTableIfExists(User{})
+
 // Automating Migration
 db.AutoMigrate(User{})
 

main.go

@@ -340,6 +340,10 @@ func (s *DB) DropTable(value interface{}) *DB {
 	return s.clone().NewScope(value).dropTable().db
 }
 
+func (s *DB) DropTableIfExists(value interface{}) *DB {
+	return s.clone().NewScope(value).dropTableIfExists().db
+}
+
 func (s *DB) AutoMigrate(value interface{}) *DB {
 	return s.clone().NewScope(value).autoMigrate().db
 }

scope_private.go

@@ -495,6 +495,11 @@ func (scope *Scope) dropTable() *Scope {
 	return scope
 }
 
+func (scope *Scope) dropTableIfExists() *Scope {
+	scope.Raw(fmt.Sprintf("DROP TABLE IF EXISTS %v", scope.QuotedTableName())).Exec()
+	return scope
+}
+
 func (scope *Scope) modifyColumn(column string, typ string) {
 	scope.Raw(fmt.Sprintf("ALTER TABLE %v MODIFY %v %v", scope.QuotedTableName(), scope.Quote(column), typ)).Exec()
 }