def _IndexesFromIndexDict(self, index_dict):
"""Convert a query dictionary into the corresponding required indexes.
Args:
index_dict: Index usage history, a dict mapping composite index
descriptors to a count of the number of times that queries
needing such an index have been executed
Returns:
a tuple (indexes, counts) where indexes and counts are lists of the same
size, with each entry in indexes being a datastore_index.Index and each
entry in indexes being the count of the number of times the corresponding
query appeared in the history.
"""
indexes = []
counts = []
for (kind, ancestor, props), count in sorted(index_dict.iteritems()):
properties = []
for prop in props:
if prop.direction is None:
direction = None
else:
direction = (
'desc' if prop.direction == datastore_index.DESCENDING else 'asc')
mode = (
'geospatial' if prop.mode == datastore_index.GEOSPATIAL else None)
properties.append(datastore_index.Property(
name=prop.name, direction=direction, mode=mode))
indexes.append(datastore_index.Index(
kind=kind, ancestor=bool(ancestor), properties=properties))
counts.append(count)
return indexes, counts
def _IndexesFromIndexDict(self, index_dict):
"""Convert a query dictionary into the corresponding required indexes.
Args:
index_dict: Query history, a dict mapping datastore_pb.Query to a count
of the number of times that query has been issued.
Returns:
a tuple (indexes, counts) where indexes and counts are lists of the same
size, with each entry in indexes being a datastore_index.Index and each
entry in indexes being the count of the number of times the corresponding
query appeared in the history.
"""
indexes = []
counts = []
for (kind, ancestor, props), count in sorted(index_dict.iteritems()):
properties = []
for prop in props:
direction = ('asc' if prop.direction
== datastore_index.ASCENDING else 'desc')
properties.append(
datastore_index.Property(name=prop.name,
direction=direction))
indexes.append(
datastore_index.Index(kind=kind,
ancestor=bool(ancestor),
properties=properties))
counts.append(count)
return indexes, counts
def ProtoToIndexDefinition(proto):
"""Transform individual index protocol buffer to index definition.
Args:
proto: An instance of entity_pb.CompositeIndex to transform.
Returns:
A new instance of datastore_index.Index.
"""
properties = []
proto_index = proto.definition()
for prop_proto in proto_index.property_list():
prop_definition = datastore_index.Property(name=prop_proto.name())
if prop_proto.direction() == entity_pb.Index_Property.DESCENDING:
prop_definition.direction = 'descending'
properties.append(prop_definition)
index = datastore_index.Index(kind=proto_index.entity_type(),
properties=properties)
if proto_index.ancestor():
index.ancestor = True
return index