Allow template tags in a Flatpage's content

** This tag, as shown, can cause problems (infinite recursion being one) if you don't use it correctly. ** Our internal CMS has a pages app similar to Flatpages, and a "chunks" app similar to [django-chunks](http://blog.clintecker.com/2008/jul/6/django-chunks/). Because most of our other apps are template-tag driven (FAQs, job postings, news, events, etc) I wanted a way to be able to write django template code right into a page or chunk's body from within the django admin. This tag will let you write django template code into, for example, a Flatpage's content and render it with the current context. So if you had a template tag called "get_latest_news" and wanted to add latest news to a flatpage, just enter this in the flatpage's content: {% get_latest_news 5 as news %} {% for article in news %} <li>{{ article.title }}</li> {% endfor %} This ability has proven extremely useful to us. Please note this is just a "summary" snippet to illustrate the concept. Use in a production environment should include more robust error checking.

• template
• flatpages

Sun 11 Jul 2010 Read More

Specify a manager for the Admin

This example shows how you can easily limit the objects in the admin by specifying which Manager the admin should use. I haven't seen this documented anywhere (perhaps I've missed it), but it's proven extremely useful to me. The example here will limit objects to those that are attached to the current Site, but you can use any Manager you want (for example, a Manager that shows only published Articles). Finally -- not that I'm suggesting this -- but you *could* combine this with the ThreadLocals trick to show only objects that have been created by that user.

• managers
• models
• admin
• sites

Sun 11 Jul 2010 Read More

Form row filter

I love newforms. But sometimes using ``{{ form }}`` within a template doesn't give you enough flexibility. The other option, manually defining the markup for each field, is tedious, boring and error-prone. This is an example of how you can use a template filter to get the best of both worlds. Use it like this to render an entire form: ``{% for field in form %}`` {{ field|form_row }} ``{% endfor %}`` Or use it on a per-field basis: ``<fieldset>`` {{ form.first_name|form_row }} {{ form.last_name|form_row }} ``</fieldset>``

• newforms
• forms
• templates
• filters

Mon 19 Jul 2010 Read More

AjaxCheckMiddleware

Simply adds an attribute `is_ajax` to a request object, indicating if the request was made via Ajax. Allows you to reuse a lot of POST processing view code to which you'd like to progressively add Ajax: `if request.is_ajax: return JsonResponse(some_json)` `else: return render_to_response('some_template.html')`

• middleware
• ajax
• request

Sun 11 Jul 2010 Read More

Add delete buttons to admin changelist

This adds a checkbox for each object and three buttons to a model's change list: 1. **Delete selected:** deletes the selected objects 2. **Delete shown: ** deletes all the visible objects. For example, if you perform a search or in any way filter the list, this button deletes only objects that were filtered. 3. **Delete all: ** Deletes all instances of the model, including those not shown (if looking at a filtered list). The deletes perform no confirmation -- once you hit the buttons the models are **gone**, so maybe don't use (or add a confirmation screen) for really sensitive stuff. * uses django oldforms-admin (ie 0.96) * works fine if you include a search_fields list in the Admin class * code for the view could probably be refactored a bit :)

• admin

Sun 11 Jul 2010 Read More

Upload a zip file with newforms

This is a minor modification to [Upload a file using newforms](http://www.djangosnippets.org/snippets/95/) as posted by [mboersma](http://www.djangosnippets.org/snippets/95/). I altered the ZipUploadForm by removing lines 33 - 34: if 'zip_file' in self.clean_data: zip_file = self.clean_data['zip_file'] and adding a return statement to clean_zipfile, which returns the validated zip file. I also added the line: zip_file.clean = clean_zipfile so that when the full_clean() in called on the form, clean_zipfile will automatically run. All other code (the view & template) remain the same. ** Disclaimer ** I'm not *that* familiar with newforms, so please forgive me if some the explanation as to why this works is incorrect ;) Who knows, maybe the first guy had it right.

• newforms
• files
• zip-files
• upload

Sun 11 Jul 2010 Read More