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All snippets written in Python

2958 snippets

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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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Ajax error handling

Handles exceptions from AJAX code, giving more useful errors and tracebacks. (By the way, all these new snippets are extracts from [django-webapp](http://code.google.com/p/django-webapp/).) This exact code is not well tested, but it's refactored from some code we use in production.

  • middleware
  • ajax
  • error
  • exception
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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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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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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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SectionedForm

Sometimes we need divide forms in fieldsets, but this make us declare all fields in HTML template manually. This class is to help you to do this by a easy way. **How to use** First, download this file as name "sectioned_form.py" Later, turn your form inherited from the class **SectionedForm**, override method "_html_output" and declare fieldsets and fieldset_template attribute, like below: from sectioned_form import SectionedForm class MyForm(forms.ModelForm, SectionedForm): fieldsets = ( (None, ('name','age','date')), (_('Documents'), ('number','doc_id')), ) fieldset_template = "<h2>%s</h2>" def _html_output(self, *args, **kwargs): return SectionedForm._html_output(self, *args, **kwargs)

  • newforms
  • forms
  • form
  • formset
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Timing Django Requests

Adds an 'X-Django-Request-Time' HTTP response header that times how long django spent processing the request.

  • middleware
  • http
  • headers
  • profiling
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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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Verbose template filter : avoid too many if

This tiny template filter saves you the tedious test "if this variable is set, print this text based on this variable". 'verbose' filter takes one parameter : a string containing '%s' which is a placeholder for the value to test. Check those examples : * Replace this : {% if name %} Hello {{ name }}, this is a dummy text {% endif %} * By this : {{ name|verbose:"Hello %s this is a dummy text" }} This is also usefull for HTML : {{ image|verbose:"<img src=\"%s\" />" }}

  • template
  • filter
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MintCache (simple version)

This is intended as an alternative to http://www.djangosnippets.org/snippets/155/ Put this in your own cache.py and import it instead of django.core.cache and use it the same way. We left out the "add" function but it shouldn't be too hard to make if you want it. From the above post: "The purpose of this caching scheme is to avoid the dog-pile effect. Dog-piling is what normally happens when your data for the cache takes more time to generate than your server is answering requests per second. In other words if your data takes 5 seconds to generate and you are serving 10 requests per second, then when the data expires the normal cache schemes will spawn 50 attempts a regenerating the data before the first request completes. The increased load from the 49 redundant processes may further increase the time it takes to generate the data. If this happens then you are well on your way into a death spiral MintCache works to prevent this scenario by using memcached to to keep track of not just an expiration date, but also a stale date The first client to request data past the stale date is asked to refresh the data, while subsequent requests are given the stale but not-yet-expired data as if it were fresh, with the undertanding that it will get refreshed in a 'reasonable' amount of time by that initial request."

  • cache
  • memcached
  • caching
  • mintcache
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Django newforms ExtJS JSON Encoder

This is a subclass of Django's built-in JSONEncoder that adds the ability to output form and field objects as ExtJS-compatible config objects. Simple example: from django.utils import simplejson json = { 'data': [], 'success': True, 'metaData': { 'fields': SFY09RDOForm(), 'root': 'data', 'successProperty': 'success' }, } return HttpResponse(simplejson.dumps(json, cls=ExtJSONEncoder)) Where SFY09RDOForm is a subclass of django.forms.Form. 6/20/2008: Updated to pass on the help_text parameter (useful in combination with this override in ext: http://extjs.com/forum/showthread.php?t=36642)

  • json
  • ext
  • encoder
  • extjs
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Generic CSV Export

This will generically add csv exporting to your views in the admin. It will default to exporting the entire table you see (without paging). If the table only has one column, it will export the fields the the model. You can overide this functionality. I ended up creating my own admin/change_list.html to apply this functionality universally: {% extends "admin/base_site.html" %} {% load adminmedia admin_list i18n %} {% block stylesheet %}{% admin_media_prefix %}css/changelists.css{% endblock %} {% block bodyclass %}change-list{% endblock %} {% if not is_popup %}{% block breadcrumbs %}<div class="breadcrumbs"><a href="../../">{% trans "Home" %}</a> &rsaquo; {{ cl.opts.verbose_name_plural|capfirst|escape }}</div>{% endblock %}{% endif %} {% block coltype %}flex{% endblock %} {% block content %} <div id="content-main"> {% block object-tools %} <ul class="object-tools"> <li><a href="csv/{%if request.GET%}?{{request.GET.urlencode}}{%endif%}" class="addlink">Export to CSV</a></li> {% if has_add_permission %} <li><a href="add/{% if is_popup %}?_popup=1{% endif %}" class="addlink">{% blocktrans with cl.opts.verbose_name|escape as name %}Add {{ name }}{% endblocktrans %}</a></li> {% endif %} </ul> {% endblock %} <div class="module{% if cl.has_filters %} filtered{% endif %}" id="changelist"> {% block search %}{% search_form cl %}{% endblock %} {% block date_hierarchy %}{% date_hierarchy cl %}{% endblock %} {% block filters %}{% filters cl %}{% endblock %} {% block result_list %}{% result_list cl %}{% endblock %} {% block pagination %}{% pagination cl %}{% endblock %} </div> </div> {% endblock %}

  • admin
  • export
  • csv
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Simple views method binding

@match_func_by_method def frontpage (request) : pass def get_frontpage (request, argument, ) : # GET things pass def post_frontpage (request, argument, ) : # POST things pass

  • views
  • http-method
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CSVImport

This is an awesome script! The original can be found here: http://www.djangosnippets.org/snippets/633/ I had to make a couple minor changes to get it working for me, so I thought I would share the love...

  • csv
  • import
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