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