123     _fields = ()  variable in DBObject
150         assert self._fields, '_fields must be defined in your class'
184         fields = ', '.join(self._fields)
194         assert len(row) == len(self._fields), (
196             self.__table, row, len(row), self._fields, len(self._fields)))
213         for field, row_value in itertools.izip(self._fields, row):
234         for field, value in itertools.izip(self._fields, row):
275             keys = self._fields[1:] # avoid id
317         for field in cls._fields:
343     _fields = ('id', 'job_id', 'host_id')  variable in IneligibleHostQueue
348     _fields = ('id', 'name', 'description', 'max_number_of_machines',  variable in AtomicGroup
354     _fields = ('id', 'name', 'kernel_config', 'platform', 'invalid',  variable in Label
366     _fields = ('id', 'hostname', 'locked', 'synch_id', 'status',  variable in Host
483     _fields = ('id', 'job_id', 'host_id', 'status', 'meta_host',  variable in HostQueueEntry
519         new_row = [getattr(template, field) for field in cls._fields]
971     _fields = ('id', 'owner', 'name', 'priority', 'control_file',  variable in Job