Created
March 8, 2011 14:17
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Verschiedene Suchstrategien für D-Ablage
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# Beispiel einer parallelen Suche mit asynctools: | |
def parallelsearch(tenant, term): | |
"""Suche, die eine parallele Abfrage des Datastores durchführt""" | |
from asynctools import AsyncMultiTask, QueryTask | |
results = [] | |
runner = AsyncMultiTask() | |
for model in [Akte, Dokument]: | |
query = model.all().search(term).filter('tenant =', tenant) | |
runner.append(QueryTask(query, limit=1, client_state=model.__name__)) | |
runner.run() | |
for task in runner: | |
results.extend([x.as_dict(self.abs_url) for x in task.get_result()]) | |
return results | |
# Im Prinzip nicht das geforderte, da keine Präfixsuche durchgeführt wird. | |
# Dafür ein kleines Beispiel für google.appengine.ext.search.SearchableModel | |
# Liste von zu indexierenden Attributen | |
SEARCH_PROPERTIES = ['designator', 'name1', 'plz', 'email', 'ref', 'name2', 'ort'] | |
class Akte(search.SearchableModel): | |
@classmethod | |
def SearchableProperties(cls): | |
"""Gib eine Liste von zu erstellenden Indexen an. | |
Die Listenelemente sind Listen von zu indexierenden Attributen.""" | |
return [SEARCH_PROPERTIES] | |
def simplesearch(tenant, term): | |
"""Durchsuche Google Datastore nach Suchbegriff""" | |
results = [] | |
for model in [Akte, Dokument]: | |
query = model.all().search(term, properties=SEARCH_PROPERTIES).filter('tenant = ', tenant) | |
results.extend(query.fetch(25)) | |
return results |
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