python类Query()的实例源码

def make_directed_query(self, kind_class, keys_only=False):
    """Construct a query for this key range, including the scan direction.

    Args:
      kind_class: A kind implementation class (a subclass of either
        db.Model or ndb.Model).
      keys_only: bool, default False, use keys_only on Query?

    Returns:
      A db.Query or ndb.Query instance (corresponding to kind_class).

    Raises:
      KeyRangeError: if self.direction is not in (KeyRange.ASC, KeyRange.DESC).
    """
    if ndb is not None:
      if issubclass(kind_class, ndb.Model):
        return self.make_directed_ndb_query(kind_class, keys_only=keys_only)
    assert self._app is None, '_app is not supported for db.Query'
    direction = self.__get_direction("", "-")
    query = db.Query(kind_class, namespace=self.namespace, keys_only=keys_only)
    query.order("%s__key__" % direction)

    query = self.filter_query(query)
    return query

def make_directed_datastore_query(self, kind, keys_only=False):
    """Construct a query for this key range, including the scan direction.

    Args:
      kind: A string.
      keys_only: bool, default False, use keys_only on Query?

    Returns:
      A datastore.Query instance.

    Raises:
      KeyRangeError: if self.direction is not in (KeyRange.ASC, KeyRange.DESC).
    """
    direction = self.__get_direction(datastore.Query.ASCENDING,
                                     datastore.Query.DESCENDING)
    query = datastore.Query(kind, _app=self._app, keys_only=keys_only)
    query.Order(("__key__", direction))

    query = self.filter_datastore_query(query)
    return query

def make_ascending_query(self, kind_class, keys_only=False, filters=None):
    """Construct a query for this key range without setting the scan direction.

    Args:
      kind_class: A kind implementation class (a subclass of either
        db.Model or ndb.Model).
      keys_only: bool, default False, query only for keys.
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      A db.Query or ndb.Query instance (corresponding to kind_class).
    """
    if ndb is not None:
      if issubclass(kind_class, ndb.Model):
        return self.make_ascending_ndb_query(
            kind_class, keys_only=keys_only, filters=filters)
    assert self._app is None, '_app is not supported for db.Query'
    query = db.Query(kind_class, namespace=self.namespace, keys_only=keys_only)
    query.order("__key__")

    query = self.filter_query(query, filters=filters)
    return query

def make_ascending_ndb_query(self, kind_class, keys_only=False, filters=None):
    """Construct an NDB query for this key range, without the scan direction.

    Args:
      kind_class: An ndb.Model subclass.
      keys_only: bool, default False, query only for keys.

    Returns:
      An ndb.Query instance.
    """
    assert issubclass(kind_class, ndb.Model)
    if keys_only:
      default_options = ndb.QueryOptions(keys_only=True)
    else:
      default_options = None
    query = kind_class.query(app=self._app,
                             namespace=self.namespace,
                             default_options=default_options)
    query = self.filter_ndb_query(query, filters=filters)
    query = query.order(kind_class._key)
    return query

def make_ascending_datastore_query(self, kind, keys_only=False, filters=None):
    """Construct a query for this key range without setting the scan direction.

    Args:
      kind: A string.
      keys_only: bool, default False, use keys_only on Query?
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      A datastore.Query instance.
    """
    query = datastore.Query(kind,
                            namespace=self.namespace,
                            _app=self._app,
                            keys_only=keys_only)
    query.Order(("__key__", datastore.Query.ASCENDING))

    query = self.filter_datastore_query(query, filters=filters)
    return query

def make_directed_query(self, kind_class, keys_only=False):
    """Construct a query for this key range, including the scan direction.

    Args:
      kind_class: A kind implementation class (a subclass of either
        db.Model or ndb.Model).
      keys_only: bool, default False, use keys_only on Query?

    Returns:
      A db.Query or ndb.Query instance (corresponding to kind_class).

    Raises:
      KeyRangeError: if self.direction is not in (KeyRange.ASC, KeyRange.DESC).
    """
    if ndb is not None:
      if issubclass(kind_class, ndb.Model):
        return self.make_directed_ndb_query(kind_class, keys_only=keys_only)
    assert self._app is None, '_app is not supported for db.Query'
    direction = self.__get_direction("", "-")
    query = db.Query(kind_class, namespace=self.namespace, keys_only=keys_only)
    query.order("%s__key__" % direction)

    query = self.filter_query(query)
    return query

def make_directed_datastore_query(self, kind, keys_only=False):
    """Construct a query for this key range, including the scan direction.

    Args:
      kind: A string.
      keys_only: bool, default False, use keys_only on Query?

    Returns:
      A datastore.Query instance.

    Raises:
      KeyRangeError: if self.direction is not in (KeyRange.ASC, KeyRange.DESC).
    """
    direction = self.__get_direction(datastore.Query.ASCENDING,
                                     datastore.Query.DESCENDING)
    query = datastore.Query(kind, _app=self._app, keys_only=keys_only)
    query.Order(("__key__", direction))

    query = self.filter_datastore_query(query)
    return query

def make_ascending_query(self, kind_class, keys_only=False, filters=None):
    """Construct a query for this key range without setting the scan direction.

    Args:
      kind_class: A kind implementation class (a subclass of either
        db.Model or ndb.Model).
      keys_only: bool, default False, query only for keys.
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      A db.Query or ndb.Query instance (corresponding to kind_class).
    """
    if ndb is not None:
      if issubclass(kind_class, ndb.Model):
        return self.make_ascending_ndb_query(
            kind_class, keys_only=keys_only, filters=filters)
    assert self._app is None, '_app is not supported for db.Query'
    query = db.Query(kind_class, namespace=self.namespace, keys_only=keys_only)
    query.order("__key__")

    query = self.filter_query(query, filters=filters)
    return query

def make_ascending_ndb_query(self, kind_class, keys_only=False, filters=None):
    """Construct an NDB query for this key range, without the scan direction.

    Args:
      kind_class: An ndb.Model subclass.
      keys_only: bool, default False, query only for keys.

    Returns:
      An ndb.Query instance.
    """
    assert issubclass(kind_class, ndb.Model)
    if keys_only:
      default_options = ndb.QueryOptions(keys_only=True)
    else:
      default_options = None
    query = kind_class.query(app=self._app,
                             namespace=self.namespace,
                             default_options=default_options)
    query = self.filter_ndb_query(query, filters=filters)
    query = query.order(kind_class._key)
    return query

def make_ascending_datastore_query(self, kind, keys_only=False, filters=None):
    """Construct a query for this key range without setting the scan direction.

    Args:
      kind: A string.
      keys_only: bool, default False, use keys_only on Query?
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      A datastore.Query instance.
    """
    query = datastore.Query(kind,
                            namespace=self.namespace,
                            _app=self._app,
                            keys_only=keys_only)
    query.Order(("__key__", datastore.Query.ASCENDING))

    query = self.filter_datastore_query(query, filters=filters)
    return query

def testDeleteTournament(self):
    self.loginUser()
    id = self.AddBasicTournament()
    id2 = self.AddBasicTournament()
    self.assertEqual(16, len(ndb.Query(kind = "PlayerPair").fetch()))
    response = self.testapp.delete("/api/tournaments/{}".format(id))
    self.assertEqual(response.status_int, 204)
    response = self.testapp.get("/api/tournaments/{}".format(id),
                                expect_errors=True)
    self.assertEqual(response.status_int, 404)
    self.assertEqual(8, len(ndb.Query(kind = "PlayerPair").fetch()))
    response = self.testapp.get("/api/tournaments")
    tourneys = json.loads(response.body)
    self.assertIsNotNone(tourneys["tournaments"])
    self.assertEqual(1, len(tourneys["tournaments"]))
    self.assertEqual(id2, tourneys["tournaments"][0]["id"])
    response = self.testapp.get("/api/tournaments/{}".format(id2),
                                expect_errors=True)
    self.CheckBasicTournamentMetadataUnchanged(json.loads(response.body))

def make_directed_query(self, kind_class, keys_only=False):
    """Construct a query for this key range, including the scan direction.

    Args:
      kind_class: A kind implementation class (a subclass of either
        db.Model or ndb.Model).
      keys_only: bool, default False, use keys_only on Query?

    Returns:
      A db.Query or ndb.Query instance (corresponding to kind_class).

    Raises:
      KeyRangeError: if self.direction is not in (KeyRange.ASC, KeyRange.DESC).
    """
    if ndb is not None:
      if issubclass(kind_class, ndb.Model):
        return self.make_directed_ndb_query(kind_class, keys_only=keys_only)
    assert self._app is None, '_app is not supported for db.Query'
    direction = self.__get_direction("", "-")
    query = db.Query(kind_class, namespace=self.namespace, keys_only=keys_only)
    query.order("%s__key__" % direction)

    query = self.filter_query(query)
    return query

def make_directed_datastore_query(self, kind, keys_only=False):
    """Construct a query for this key range, including the scan direction.

    Args:
      kind: A string.
      keys_only: bool, default False, use keys_only on Query?

    Returns:
      A datastore.Query instance.

    Raises:
      KeyRangeError: if self.direction is not in (KeyRange.ASC, KeyRange.DESC).
    """
    direction = self.__get_direction(datastore.Query.ASCENDING,
                                     datastore.Query.DESCENDING)
    query = datastore.Query(kind, _app=self._app, keys_only=keys_only)
    query.Order(("__key__", direction))

    query = self.filter_datastore_query(query)
    return query

def make_ascending_query(self, kind_class, keys_only=False, filters=None):
    """Construct a query for this key range without setting the scan direction.

    Args:
      kind_class: A kind implementation class (a subclass of either
        db.Model or ndb.Model).
      keys_only: bool, default False, query only for keys.
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      A db.Query or ndb.Query instance (corresponding to kind_class).
    """
    if ndb is not None:
      if issubclass(kind_class, ndb.Model):
        return self.make_ascending_ndb_query(
            kind_class, keys_only=keys_only, filters=filters)
    assert self._app is None, '_app is not supported for db.Query'
    query = db.Query(kind_class, namespace=self.namespace, keys_only=keys_only)
    query.order("__key__")

    query = self.filter_query(query, filters=filters)
    return query

def make_ascending_ndb_query(self, kind_class, keys_only=False, filters=None):
    """Construct an NDB query for this key range, without the scan direction.

    Args:
      kind_class: An ndb.Model subclass.
      keys_only: bool, default False, query only for keys.

    Returns:
      An ndb.Query instance.
    """
    assert issubclass(kind_class, ndb.Model)
    if keys_only:
      default_options = ndb.QueryOptions(keys_only=True)
    else:
      default_options = None
    query = kind_class.query(app=self._app,
                             namespace=self.namespace,
                             default_options=default_options)
    query = self.filter_ndb_query(query, filters=filters)
    query = query.order(kind_class._key)
    return query

def make_ascending_datastore_query(self, kind, keys_only=False, filters=None):
    """Construct a query for this key range without setting the scan direction.

    Args:
      kind: A string.
      keys_only: bool, default False, use keys_only on Query?
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      A datastore.Query instance.
    """
    query = datastore.Query(kind,
                            namespace=self.namespace,
                            _app=self._app,
                            keys_only=keys_only)
    query.Order(("__key__", datastore.Query.ASCENDING))

    query = self.filter_datastore_query(query, filters=filters)
    return query

def make_directed_query(self, kind_class, keys_only=False):
    """Construct a query for this key range, including the scan direction.

    Args:
      kind_class: A kind implementation class (a subclass of either
        db.Model or ndb.Model).
      keys_only: bool, default False, use keys_only on Query?

    Returns:
      A db.Query or ndb.Query instance (corresponding to kind_class).

    Raises:
      KeyRangeError: if self.direction is not in (KeyRange.ASC, KeyRange.DESC).
    """
    if ndb is not None:
      if issubclass(kind_class, ndb.Model):
        return self.make_directed_ndb_query(kind_class, keys_only=keys_only)
    assert self._app is None, '_app is not supported for db.Query'
    direction = self.__get_direction("", "-")
    query = db.Query(kind_class, namespace=self.namespace, keys_only=keys_only)
    query.order("%s__key__" % direction)

    query = self.filter_query(query)
    return query

def make_directed_datastore_query(self, kind, keys_only=False):
    """Construct a query for this key range, including the scan direction.

    Args:
      kind: A string.
      keys_only: bool, default False, use keys_only on Query?

    Returns:
      A datastore.Query instance.

    Raises:
      KeyRangeError: if self.direction is not in (KeyRange.ASC, KeyRange.DESC).
    """
    direction = self.__get_direction(datastore.Query.ASCENDING,
                                     datastore.Query.DESCENDING)
    query = datastore.Query(kind, _app=self._app, keys_only=keys_only)
    query.Order(("__key__", direction))

    query = self.filter_datastore_query(query)
    return query

def make_ascending_query(self, kind_class, keys_only=False, filters=None):
    """Construct a query for this key range without setting the scan direction.

    Args:
      kind_class: A kind implementation class (a subclass of either
        db.Model or ndb.Model).
      keys_only: bool, default False, query only for keys.
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      A db.Query or ndb.Query instance (corresponding to kind_class).
    """
    if ndb is not None:
      if issubclass(kind_class, ndb.Model):
        return self.make_ascending_ndb_query(
            kind_class, keys_only=keys_only, filters=filters)
    assert self._app is None, '_app is not supported for db.Query'
    query = db.Query(kind_class, namespace=self.namespace, keys_only=keys_only)
    query.order("__key__")

    query = self.filter_query(query, filters=filters)
    return query

def make_ascending_ndb_query(self, kind_class, keys_only=False, filters=None):
    """Construct an NDB query for this key range, without the scan direction.

    Args:
      kind_class: An ndb.Model subclass.
      keys_only: bool, default False, query only for keys.

    Returns:
      An ndb.Query instance.
    """
    assert issubclass(kind_class, ndb.Model)
    if keys_only:
      default_options = ndb.QueryOptions(keys_only=True)
    else:
      default_options = None
    query = kind_class.query(app=self._app,
                             namespace=self.namespace,
                             default_options=default_options)
    query = self.filter_ndb_query(query, filters=filters)
    query = query.order(kind_class._key)
    return query

def make_ascending_datastore_query(self, kind, keys_only=False, filters=None):
    """Construct a query for this key range without setting the scan direction.

    Args:
      kind: A string.
      keys_only: bool, default False, use keys_only on Query?
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      A datastore.Query instance.
    """
    query = datastore.Query(kind,
                            namespace=self.namespace,
                            _app=self._app,
                            keys_only=keys_only)
    query.Order(("__key__", datastore.Query.ASCENDING))

    query = self.filter_datastore_query(query, filters=filters)
    return query

def GetBackupXML():
    thisdate = datetime.datetime.now()
    xml = '<?xml version="1.0" encoding="utf-8"?>\r\n<data date="' + thisdate.isoformat() + '">\r\n'
    kinds = metadata.get_kinds()
    for kind in kinds:
        if kind.startswith('_'):
            pass  # Ignore kinds that begin with _, they are internal to GAE
        else:
            q = ndb.Query(kind=kind)
            all = q.fetch()
            for e in all:
                xml += '<' + kind + '>\r\n'
                for n, v in e._properties.items():
                    xml += '  <' + n + '>'
                    xml += str(getattr(e, n))
                    xml += '</' + n + '>\r\n'
                xml += '</' + kind + '>\r\n'

    xml += '</data>'
    return xml

def make_directed_query(self, kind_class, keys_only=False):
    """Construct a query for this key range, including the scan direction.

    Args:
      kind_class: A kind implementation class (a subclass of either
        db.Model or ndb.Model).
      keys_only: bool, default False, use keys_only on Query?

    Returns:
      A db.Query or ndb.Query instance (corresponding to kind_class).

    Raises:
      KeyRangeError: if self.direction is not in (KeyRange.ASC, KeyRange.DESC).
    """
    if ndb is not None:
      if issubclass(kind_class, ndb.Model):
        return self.make_directed_ndb_query(kind_class, keys_only=keys_only)
    assert self._app is None, '_app is not supported for db.Query'
    direction = self.__get_direction("", "-")
    query = db.Query(kind_class, namespace=self.namespace, keys_only=keys_only)
    query.order("%s__key__" % direction)

    query = self.filter_query(query)
    return query

def make_directed_datastore_query(self, kind, keys_only=False):
    """Construct a query for this key range, including the scan direction.

    Args:
      kind: A string.
      keys_only: bool, default False, use keys_only on Query?

    Returns:
      A datastore.Query instance.

    Raises:
      KeyRangeError: if self.direction is not in (KeyRange.ASC, KeyRange.DESC).
    """
    direction = self.__get_direction(datastore.Query.ASCENDING,
                                     datastore.Query.DESCENDING)
    query = datastore.Query(kind, _app=self._app, keys_only=keys_only)
    query.Order(("__key__", direction))

    query = self.filter_datastore_query(query)
    return query

def make_ascending_query(self, kind_class, keys_only=False, filters=None):
    """Construct a query for this key range without setting the scan direction.

    Args:
      kind_class: A kind implementation class (a subclass of either
        db.Model or ndb.Model).
      keys_only: bool, default False, query only for keys.
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      A db.Query or ndb.Query instance (corresponding to kind_class).
    """
    if ndb is not None:
      if issubclass(kind_class, ndb.Model):
        return self.make_ascending_ndb_query(
            kind_class, keys_only=keys_only, filters=filters)
    assert self._app is None, '_app is not supported for db.Query'
    query = db.Query(kind_class, namespace=self.namespace, keys_only=keys_only)
    query.order("__key__")

    query = self.filter_query(query, filters=filters)
    return query

def make_ascending_ndb_query(self, kind_class, keys_only=False, filters=None):
    """Construct an NDB query for this key range, without the scan direction.

    Args:
      kind_class: An ndb.Model subclass.
      keys_only: bool, default False, query only for keys.

    Returns:
      An ndb.Query instance.
    """
    assert issubclass(kind_class, ndb.Model)
    if keys_only:
      default_options = ndb.QueryOptions(keys_only=True)
    else:
      default_options = None
    query = kind_class.query(app=self._app,
                             namespace=self.namespace,
                             default_options=default_options)
    query = self.filter_ndb_query(query, filters=filters)
    query = query.order(kind_class._key)
    return query

def make_ascending_datastore_query(self, kind, keys_only=False, filters=None):
    """Construct a query for this key range without setting the scan direction.

    Args:
      kind: A string.
      keys_only: bool, default False, use keys_only on Query?
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      A datastore.Query instance.
    """
    query = datastore.Query(kind,
                            namespace=self.namespace,
                            _app=self._app,
                            keys_only=keys_only)
    query.Order(("__key__", datastore.Query.ASCENDING))

    query = self.filter_datastore_query(query, filters=filters)
    return query

def test_query(self):
        """
        Encoding a L{ndb.Query} should be returned as a list.
        """
        query = models.SimpleEntity.query()

        self.assertIsInstance(query, ndb.Query)

        self.assertEncodes(query, (
            '\n\x00\x00\x00\x00'
        ), encoding=pyamf.AMF0)

        self.assertEncodes(query, (
            '\t\x01\x01'
        ), encoding=pyamf.AMF3)

def _IsNdbQuery(query):
  return ndb is not None and isinstance(query, ndb.Query)

def filter_query(self, query, filters=None):
    """Add query filter to restrict to this key range.

    Args:
      query: A db.Query or ndb.Query instance.
      filters: optional list of filters to apply to the query. Each filter is
        a tuple: (<property_name_as_str>, <query_operation_as_str>, <value>).
        User filters are applied first.

    Returns:
      The input query restricted to this key range.
    """
    if ndb is not None:
      if _IsNdbQuery(query):
        return self.filter_ndb_query(query, filters=filters)
    assert not _IsNdbQuery(query)


    if filters:
      for f in filters:
        query.filter("%s %s" % (f[0], f[1]), f[2])

    if self.include_start:
      start_comparator = ">="
    else:
      start_comparator = ">"
    if self.include_end:
      end_comparator = "<="
    else:
      end_comparator = "<"
    if self.key_start:
      query.filter("__key__ %s" % start_comparator, self.key_start)
    if self.key_end:
      query.filter("__key__ %s" % end_comparator, self.key_end)
    return query