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All snippets written in Python

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Default settings for a app

Save this as conf.py in the app's directory. Now you can do `from myapp.conf import settings`. You can access from the imported object every item of your settings.py including the default settings of myapp. Though you don't have to define every setting in settings.py you use in your app. Now you can ommit annoying try...except statements to define defaults directly in the code.

  • settings
  • conf
  • app
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DebugFooter middleware with Pygments sql syntax highlighting

Based on Snippet [766](http://www.djangosnippets.org/snippets/766/) but added syntax highlighting of the sql output via [pygments](http://pygments.org/). The sql output will also be wrapped at 120 characters by default (can be configured by changing WRAP). It degrades nicely if pygments is not installed. This will add quite some cpu-cycles just for printing debug messages so use with care. Following is the rest of the original description by [simon](http://www.djangosnippets.org/users/simon/) (shamelessly copied): Adds a hidden footer to the bottom of every text/html page containing a list of SQL queries executed and templates that were loaded (including their full filesystem path to help debug complex template loading scenarios). To use, drop into a file called 'debug_middleware.py' on your Python path and add 'debug_middleware.DebugFooter' to your MIDDLEWARE_CLASSES setting. Edit: Added the ability to set the height of the debug-box

  • sql
  • middleware
  • debugging
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Extended JSON encoder

The Django JSON encoder already extends the `simplejson` encoder a little; this extends it more and gives an example of how to go about further extension. Hopefully `newserializers` (see the community aggregator today) will supercede this, but until then, it's useful.

  • serialize
  • json
  • serializer
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Another JsonResponse

Another `JsonResponse` class, including comment wrapping. Extensions to other kinds of CSRF protection should be obvious. Good explanations of why such protections are needed would make excellent comments on this snippet. This depends on the `json_encode` method in [snippet 800](http://www.djangosnippets.org/snippets/800/).

  • json
  • response
  • jsonresponse
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Ajax API class

Whip up an AJAX API for your site in a jiffy: class MySite(AJAXApi): @AJAXApi.export def hello(request): return {'content': self.get_content()} def get_content(self): return 'Hello, world!' urlpatterns += MySite().url_patterns() (the example needs the JSON encoding middleware of [snippet 803](http://www.djangosnippets.org/snippets/803/) to work.) The secret is that bound instance methods are callable too, so work as views. (Most Django people only use functions, or sometimes classes with `__call__`, as view functions.) You get implicit type dispatch off that `self` object. So you could subclass `MySite`, change `get_content`, and still use the same `hello` method. See (django-webapp)[http://code.google.com/p/django-webapp/] for a REST-ish Resource class using this same idea. You can clearly do better than my `func_to_view`, and also make a better decorator than `exported` (so you can actually say `@exported('name') def function()` etc.). This is more of a proof of concept that should work for most people. Caveat: I've changed a few things since I last really tested this. (psst, this also works for non-AJAX views too.)

  • ajax
  • api
  • instance-view
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JSON encoding middleware

Makes it really easy to return JSON from your views: just return a dict. (Also from [django-webapp](http://code.google.com/p/django-webapp/).)

  • middleware
  • serialize
  • json
  • encode
  • encoding
  • serializer
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Templatetag startswith + message tuned

Template: `<div id="messageBox_{{ forloop.counter0 }}" style="border:1px solid #ccc;background-color:white" onclick="document.getElementById ('messageBox_{{ forloop.counter0 }}').style.display = 'none';"> {% ifstartswith message "#ok#" %} <font color="green"> {% endifstartswith %} {% ifstartswith message "#error#" %} <font color="red"> {% endifstartswith %} {{ message|cut:"#ok#"|cut:"#error#" }} </font> </div>` In a view you can now do something like that: ` request.user.message_set.create(message="#ok#Hello User, this is a ok message!")`

  • template
  • templatetags
  • message
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Creating MySQL Alter table commands for Foreign Keys

When using mysql the sql that is generated by syncdb doesn't create the foreign key relationship in all cases. This code will run through a file called create_table.sql in which you store all your create sql statements ( use "python manage.py sqlall app1 app2 > create_table.sql" ) and outputs all the neccesary alter table scripts that add the foreign key. Its not 100% proof since the generated names can end up being more than 40 characters. Need to work on that. I have [written](http://vidyanand.wordpress.com/2008/06/16/is-it-a-mysql-or-django-fault/) about it a little more in detail.

  • mysql
  • foreign-keys
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RecaptchaForm

There already is a [snippet on here](http://www.djangosnippets.org/snippets/433/) that shows how to use reCAPTCHA with Django, but being the lazya-- that I am, I wanted the form to: * display the captcha when as_table is used * handle captcha validation for me So RecaptchaForm does the trick. Just subclass from it and voila, your form will include reCAPTCHA validation. Other than that, you need to * be on Django trunk version (or use clean_data instead of cleaned_data for 0.96) * set RECAPTCHA_PRIVATE_KEY and RECAPTCHA_PUBLIC_KEY in your settings.py * make sure that the [captcha module](http://pypi.python.org/pypi/recaptcha-client) is available somewhere (i.e. that "import captcha" works)

  • captcha
  • recaptcha
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401 HttpResponse

This is a HTTP response is use in my application when I want to return a 401. It's pretty simple, but effective for my needs.

  • 401
  • httpresponse
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Model manager with row caching

RowCacheManager is a model manager that will try to fetch any 'get' (i.e., single-row) requests from the cache. ModelWithCaching is an abstract base model that does some extra work that you'll probably want if you're using the RowCacheManager. So to use this code, you just need to do two things: First, set objects=RowCacheManager() in your model definition, then inherit from ModelWithCaching if you want the invalidation for free. If you are unusually brave, use the metaclass for ModelWithCaching and you won't even need the "objects=RowCacheManager()" line.

  • get
  • model
  • manager
  • model-inheritance
  • caching
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Delicious Tag

Just add it in templatetags/delicious.py In your template: <h3>Del.icio.us</h3> <ul class="list"> {% load delicious %} {% load_delicious_links %} {% for link in delicious_links %} <li><a href="{{link.link}}">{{link.title|safe}}</a></li> {% endfor %} </ul>

  • tag
  • delicious
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Pygmentation

Usage: (if you save it as pigmentation.py as I did) {% load pigmentation %} {% autoescape off %} {{ somevariable|pygmentize }} {% endautoescape %} There already a few of this code around, but this one is pretty clean, and includes css. It also works in both the development server and Dreamhost (python2.4 in my django config) without any unicode problems.

  • filter
  • tag
  • templatetag
  • pygments
  • code
  • colorize
  • color
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