def GetFilterPredicate(self, *args, **kwds):
"""Adds filters for the search query, then delegates to the superclass.
Mimics Query.GetFilterPredicate()'s signature. Raises BadFilterError if a
filter on the index property already exists.
Returns:
datastore_query.FilterPredicate
"""
properties = getattr(self, "_properties", ALL_PROPERTIES)
index_property_name = SearchableEntity.IndexPropertyName(properties)
if index_property_name in self:
raise datastore_errors.BadFilterError('%s is a reserved name.' %
index_property_name)
filter = super(SearchableQuery, self).GetFilterPredicate(*args, **kwds)
if hasattr(self, '_search_query'):
keywords = SearchableEntity._FullTextIndex(
self._search_query, self._word_delimiter_regex)
if keywords:
search_filter = datastore_query.make_filter(
index_property_name, '=', list(keywords))
if filter:
filter = datastore_query.CompositeFilter(
datastore_query.CompositeFilter.AND,
[filter, search_filter])
else:
filter = search_filter
return filter
def _GetQueryCompositeFilter(self, filters, operator):
"""Wraps the filters in a datastore_query.CompositeFilter if length > 1."""
if not filters:
return None
elif len(filters) == 1:
return filters[0]
else:
return datastore_query.CompositeFilter(operator, filters)
def _to_filter(self, bindings):
filters = filter(None,
(node._to_filter(bindings) for node in self.__nodes))
return datastore_query.CompositeFilter(_AND, filters)
