def drop_columns(self, model, *names, **kwargs): """Remove fields from model.""" fields = [field for field in model._meta.fields.values() if field.name in names] cascade = kwargs.pop('cascade', True) for field in fields: self.__del_field__(model, field) if field.unique: index_name = make_index_name(model._meta.table_name, [field.column_name]) self.ops.append(self.migrator.drop_index(model._meta.table_name, index_name)) self.ops.append( self.migrator.drop_column( model._meta.table_name, field.column_name, cascade=cascade)) return model
def drop_columns(self, model, *names, **kwargs): """Remove fields from model.""" fields = [field for field in model._meta.fields.values() if field.name in names] cascade = kwargs.pop('cascade', True) for field in fields: self.__del_field__(model, field) if field.unique: index_name = make_index_name(model._meta.table_name, [field.column_name]) self.ops.append(self.migrator.drop_index(model._meta.table_name, index_name)) self.ops.append( self.migrator.drop_column( model._meta.table_name, field.column_name, cascade=cascade)) return model
def drop_index(self, model, *columns): """Drop indexes.""" columns_ = [] for col in columns: field = model._meta.fields.get(col) if len(columns) == 1: field.unique = field.index = False if isinstance(field, pw.ForeignKeyField): col = col + '_id' columns_.append(col) index_name = make_index_name(model._meta.table_name, columns_) model._meta.indexes = [(cols, _) for (cols, _) in model._meta.indexes if columns != cols] self.ops.append( self.migrator.drop_index(model._meta.table_name, index_name)) return model
def drop_index(self, model, *columns): """Drop indexes.""" columns_ = [] for col in columns: field = model._meta.fields.get(col) if not field: continue if len(columns) == 1: field.unique = field.index = False if isinstance(field, pw.ForeignKeyField): col = col + '_id' columns_.append(col) index_name = make_index_name(model._meta.table_name, columns_) model._meta.indexes = [(cols, _) for (cols, _) in model._meta.indexes if columns != cols] self.ops.append(self.migrator.drop_index(model._meta.table_name, index_name)) return model