custom template tags in GAE django

In vanilla django, if you wanted to `{% load foo_tags %}, what you did wsa to create a importable templatetags namespace with a foo_tags.py like this:

/
|- settings.py
|- manage.py
|- ...
|- templatetags/
   |- __init__.py
   |- foo_tags.py

But with Google App Engine's django (0.96), it's not so easy. The tag ...

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copying fields from model forms in django

Recently, I found myself trying to create a model form with fields spanning multiple models. I knew I could just re-define the fields manually, but that makes for poor maintainability (read: too lazy to type).

After some digging in ModelFormMetaclass and modelform_factory(), here's what I came up with:

from ...

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improving performance of django tests with nested transactions/savepoints

Check it out here.

This monkey-patches django.tests.testcases.TestCase so that all tests in a TestCase take place in a BEGIN transaction, while test methods take place in a nested transaction, with a savepoint being recorded after fixtures are loaded before a test, and rolling back to it after ...

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support for sqlite3 nested transactions/savepoints in django

Afaik, only the Oracle and Postgres backends has this; sqlite already has it for almost a year now, but there still isn't support for it in django.

I've posted a patch for inclusion; it'll be interesting to see how it goes.

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improving performance of django tests with yaml-based fixtures

For TestCases that use yaml fixtures, and/or if your app contains initial data fixtures, they'll get loaded and parsed for every test method - yep, you read that right.

You can get a nice performance boost by caching parsed yaml fixtures/memoization.

Edit: Note that this won't kick ...

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inserting {% csrf_token %} in django templates

Here's a quick script to append {% csrf_token %} at the end of the opening <form> tag across your html files:

$ grep -REli --include="*.html" "<form.+method[[:space:]]?=[[:space:]]?['\"]?post['\"]?" . \
| xargs sed -i -re "s|(<form.+method[^=]*=\W?post[^>]+>)|\1{% csrf_token %}|i"

For git users, you can use git-grep instead of ...

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