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POIs it possible to use 'in' keyword to filter on ListProperty(item_type=datetime.date)?
 

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  1. POIs it possible to use 'in' keyword to filter on ListProperty(item_type=datetime.date)?
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    <p>I have google app engine Event model. I need to find events in some date range. It could be [15.02.2012, 15.03.2012, 18.04.2013]. But when I'm searching I get exception.</p> <p>Model class:</p> <pre><code>class Event(db.Model): title = db.StringProperty() dates = db.ListProperty(item_type=datetime.date) dates = [datetime.date.today(), datetime.date.today() + datetime.timedelta(days = 7), datetime.date.today() + datetime.timedelta(days = 14), datetime.date.today() + datetime.timedelta(days = 24)] </code></pre> <p>Here is my query:</p> <pre><code># exception query = db.GqlQuery('SELECT * FROM Event WHERE dates in :dates', dates=dates) </code></pre> <p>This code is without exception but with wrong results:</p> <pre><code># 0 results, it's wrong query = db.GqlQuery('SELECT * FROM Event WHERE dates in :dates', dates=[datetime.datetime.now()]) </code></pre> <p>Works, but I need 'in':</p> <pre><code>query = db.GqlQuery('SELECT * FROM Event WHERE dates = DATE(2012, 1, 23)') </code></pre> <p>The same exception:</p> <pre><code>query = db.GqlQuery('SELECT * FROM Event WHERE dates in [DATE(2012, 1, 23)]') </code></pre> <p>Description of exception:</p> <pre><code>ERROR 2012-01-23 13:38:28,335 base.py:117] error: code='internal_server_error', message="Unsupported type for property : &lt;type 'datetime.date'&gt;" ERROR 2012-01-23 13:38:28,345 base.py:119] Traceback (most recent call last): File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2\webapp2.py", line 545, in dispatch return method(*args, **kwargs) File "D:\project\eventinarea\eventinarea\handler\event.py", line 12, in get tags=self.param('tags') File "D:\project\eventinarea\eventinarea\logic\event.py", line 20, in search_events logging.info(query.count()) File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\db\__init__.py", line 2059, in count raw_query = self._get_query() File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\db\__init__.py", line 2633, in _get_query self._cursor, self._end_cursor) File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\gql\__init__.py", line 326, in Bind query.update(enumerated_query) File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\datastore.py", line 1723, in update self.__setitem__(filter, value) File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\datastore.py", line 1666, in __setitem__ datastore_types.ValidateProperty(' ', value, read_only=True) File "C:\Program Files (x86)\Google\google_appengine\google\appengine\api\datastore_types.py", line 1480, in ValidateProperty 'Unsupported type for property %s: %s' % (name, v.__class__)) BadValueError: Unsupported type for property : &lt;type 'datetime.date'&gt; </code></pre>
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    1. COit's only example of code. I really need to use 'in' with the list of dates as parameter
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