def scan(self, req, body, project_id, table_name): utils.check_project_id(req.context, project_id) req.context.tenant = project_id with probe.Probe(__name__ + '.validation'): validation.validate_object(body, "body") # get attributes_to_get attributes_to_get = body.pop(parser.Props.ATTRIBUTES_TO_GET, None) if attributes_to_get: validation.validate_list(attributes_to_get, parser.Props.ATTRIBUTES_TO_GET) for attr_name in attributes_to_get: validation.validate_attr_name(attr_name) select = body.pop(parser.Props.SELECT, None) if select is None: if attributes_to_get: select = models.SelectType.SELECT_TYPE_SPECIFIC else: select = models.SelectType.SELECT_TYPE_ALL else: validation.validate_string(select, parser.Props.SELECT) select_type = models.SelectType(select, attributes_to_get) limit = body.pop(parser.Props.LIMIT, None) if limit is not None: limit = validation.validate_integer(limit, parser.Props.LIMIT, min_val=0) # parse exclusive_start_key_attributes exclusive_start_key_attributes_json = body.pop( parser.Props.EXCLUSIVE_START_KEY, None) if exclusive_start_key_attributes_json is not None: validation.validate_object(exclusive_start_key_attributes_json, parser.Props.EXCLUSIVE_START_KEY) exclusive_start_key_attributes = ( parser.Parser.parse_item_attributes( exclusive_start_key_attributes_json)) else: exclusive_start_key_attributes = None scan_filter_json = body.pop(parser.Props.SCAN_FILTER, None) if scan_filter_json: validation.validate_object(scan_filter_json, parser.Props.SCAN_FILTER) condition_map = parser.Parser.parse_attribute_conditions( scan_filter_json, condition_class=ScanCondition) else: condition_map = None total_segments = body.pop(parser.Props.TOTAL_SEGMENTS, 1) total_segments = validation.validate_integer( total_segments, parser.Props.TOTAL_SEGMENTS, min_val=1, max_val=4096) segment = body.pop(parser.Props.SEGMENT, 0) segment = validation.validate_integer(segment, parser.Props.SEGMENT, min_val=0, max_val=total_segments) validation.validate_unexpected_props(body, "body") result = storage.scan( req.context, table_name, condition_map, attributes_to_get=attributes_to_get, limit=limit, exclusive_start_key=exclusive_start_key_attributes) response = { parser.Props.COUNT: result.count, parser.Props.SCANNED_COUNT: result.scanned_count } if not select_type.is_count: response[parser.Props.ITEMS] = [ parser.Parser.format_item_attributes(row) for row in result.items ] if result.last_evaluated_key: response[parser.Props.LAST_EVALUATED_KEY] = ( parser.Parser.format_item_attributes( result.last_evaluated_key)) return response
def query(self, req, body, project_id, table_name): with probe.Probe(__name__ + '.validation'): validation.validate_object(body, "body") # get attributes_to_get attributes_to_get = body.pop(parser.Props.ATTRIBUTES_TO_GET, None) if attributes_to_get is not None: validation.validate_list(attributes_to_get, parser.Props.ATTRIBUTES_TO_GET) for attr_name in attributes_to_get: validation.validate_attr_name(attr_name) index_name = body.pop(parser.Props.INDEX_NAME, None) if index_name is not None: validation.validate_index_name(index_name) select = body.pop(parser.Props.SELECT, None) if select is None: if attributes_to_get: select = models.SelectType.SELECT_TYPE_SPECIFIC else: if index_name is not None: select = models.SelectType.SELECT_TYPE_ALL_PROJECTED else: select = models.SelectType.SELECT_TYPE_ALL else: validation.validate_string(select, parser.Props.SELECT) select_type = models.SelectType(select, attributes_to_get) # parse exclusive_start_key_attributes exclusive_start_key_attributes_json = body.pop( parser.Props.EXCLUSIVE_START_KEY, None) if exclusive_start_key_attributes_json is not None: validation.validate_object(exclusive_start_key_attributes_json, parser.Props.EXCLUSIVE_START_KEY) exclusive_start_key_attributes = ( parser.Parser.parse_item_attributes( exclusive_start_key_attributes_json)) else: exclusive_start_key_attributes = None # parse indexed_condition_map key_conditions = body.pop(parser.Props.KEY_CONDITIONS, None) validation.validate_object(key_conditions, parser.Props.KEY_CONDITIONS) indexed_condition_map = parser.Parser.parse_attribute_conditions( key_conditions, condition_class=IndexedCondition) # TODO(dukhlov): # it would be nice to validate given table_name, key_attributes and # attributes_to_get to schema expectation consistent_read = body.pop(parser.Props.CONSISTENT_READ, False) validation.validate_boolean(consistent_read, parser.Props.CONSISTENT_READ) limit = body.pop(parser.Props.LIMIT, None) if limit is not None: limit = validation.validate_integer(limit, parser.Props.LIMIT, min_val=0) scan_forward = body.pop(parser.Props.SCAN_INDEX_FORWARD, None) if scan_forward is not None: validation.validate_boolean(scan_forward, parser.Props.SCAN_INDEX_FORWARD) order_type = (models.ORDER_TYPE_ASC if scan_forward else models.ORDER_TYPE_DESC) else: order_type = None validation.validate_unexpected_props(body, "body") # select item result = storage.query( req.context, table_name, indexed_condition_map, select_type=select_type, index_name=index_name, limit=limit, consistent=consistent_read, order_type=order_type, exclusive_start_key=exclusive_start_key_attributes) # format response if select_type.type == models.SelectType.SELECT_TYPE_COUNT: response = {parser.Props.COUNT: result.count} else: response = { parser.Props.COUNT: result.count, parser.Props.ITEMS: [ parser.Parser.format_item_attributes(row) for row in result.items ] } if limit == result.count: response[parser.Props.LAST_EVALUATED_KEY] = ( parser.Parser.format_item_attributes( result.last_evaluated_key)) return response