Factor out the 'key fields without link_id' logic from document Also make sure the to-be-removed is present before removing it when doing the field reordening. Patch by: Sverre Rabbelier

from query import *
from subqueries import *
from where import AND, OR
from datastructures import EmptyResultSet

__all__ = ['Query', 'AND', 'OR', 'EmptyResultSet']