/boto-2.5.2/boto/sdb/db/query.py
# · Python · 85 lines · 51 code · 12 blank · 22 comment · 7 complexity · 62a2b202c81790c55c805eaea89488e9 MD5 · raw file
- # Copyright (c) 2006,2007,2008 Mitch Garnaat http://garnaat.org/
- #
- # Permission is hereby granted, free of charge, to any person obtaining a
- # copy of this software and associated documentation files (the
- # "Software"), to deal in the Software without restriction, including
- # without limitation the rights to use, copy, modify, merge, publish, dis-
- # tribute, sublicense, and/or sell copies of the Software, and to permit
- # persons to whom the Software is furnished to do so, subject to the fol-
- # lowing conditions:
- #
- # The above copyright notice and this permission notice shall be included
- # in all copies or substantial portions of the Software.
- #
- # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
- # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
- # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- # IN THE SOFTWARE.
- class Query(object):
- __local_iter__ = None
- def __init__(self, model_class, limit=None, next_token=None, manager=None):
- self.model_class = model_class
- self.limit = limit
- self.offset = 0
- if manager:
- self.manager = manager
- else:
- self.manager = self.model_class._manager
- self.filters = []
- self.select = None
- self.sort_by = None
- self.rs = None
- self.next_token = next_token
- def __iter__(self):
- return iter(self.manager.query(self))
- def next(self):
- if self.__local_iter__ == None:
- self.__local_iter__ = self.__iter__()
- return self.__local_iter__.next()
- def filter(self, property_operator, value):
- self.filters.append((property_operator, value))
- return self
- def fetch(self, limit, offset=0):
- """Not currently fully supported, but we can use this
- to allow them to set a limit in a chainable method"""
- self.limit = limit
- self.offset = offset
- return self
- def count(self, quick=True):
- return self.manager.count(self.model_class, self.filters, quick, self.sort_by, self.select)
- def get_query(self):
- return self.manager._build_filter_part(self.model_class, self.filters, self.sort_by, self.select)
- def order(self, key):
- self.sort_by = key
- return self
-
- def to_xml(self, doc=None):
- if not doc:
- xmlmanager = self.model_class.get_xmlmanager()
- doc = xmlmanager.new_doc()
- for obj in self:
- obj.to_xml(doc)
- return doc
- def get_next_token(self):
- if self.rs:
- return self.rs.next_token
- if self._next_token:
- return self._next_token
- return None
- def set_next_token(self, token):
- self._next_token = token
- next_token = property(get_next_token, set_next_token)