Managing Google AppEngine datastore maintenance

This code defines a decorator that inform users of your site when the Google AppEngine data store is in read-only mode during maintenance periods. Use it as a decorator on your views that require write access to the data store. @requires_datastore_write def update(request): ... Create a `maintenance.html` Django template (or change the name in the code) with the message that the user will see, something like: This application is currently in maintenance mode and some operations are temporarily unavailable. Thanks for trying back later. Sorry for the inconvenience.

• decorator
• readonly
• appengine
• maintenance
• capabilities
• datastore

Sun 11 Jul 2010 Read More

Use MEDIA_URL in flatpages with SSL

This is a copy of [snippet 654](http://djangosnippets.org/snippets/654/), modified to allow dynamic MEDIA_URL, as you might need that for SSL in combination with [snippet 1754](http://djangosnippets.org/snippets/1754/). This is a template filter to enable the use of the MEDIA_URL setting in content from the flatpages database table. It searches for {{ MEDIA_URL }} and replaces it with the current MEDIA_URL added by a context processor. Note: To set up, drop the above code into a file called media_url.py in your templatetags directory in one of your INSTALLED_APPS, and add the filter to your flatpages template like so: {% load media_url %} {{ flatpage.content|media_url:MEDIA_URL }}

• filter
• ssl
• context
• flatpages
• processor

Sun 11 Jul 2010 Read More

Parse datetime model field to string

Checks the type of the field (date / time / date-time) and returns corresponding value as a string.

• datetime
• string
• parse

Sun 11 Jul 2010 Read More

Aggregation class "Sum" with Case

Just use it like below: from downloaded_file import SumCase MyClass.objects.aggregate( sum1=SumCase('salary', case='salary < 4', when=True), sum1=SumCase('salary', case='type', when='director'), )

• annotate
• aggregation
• sum

Sun 11 Jul 2010 Read More