Since django insists on throwing a DoesNotExist rather than just returning a None from the far side of a null OneToOneField, I wrote this to have a sane way of getting those fields out without having to try/except all over in my code.
My Models has a FK to translations and also a many 2 many to categories which also them are translated With this code I concatenate the translation of the categories and allow the changelist to order them. works only on mysql but you can adapt to your DB SET SESSION is required by mysql.
Adds a shortcut to edit releated objects right/ForeignKey fields. an edit symbol will be shown right next to the "add annother" link on all select boxes, with opens the releated object currently selected in a popup window. **depends on jquery** Add this to the head of "templates/admin/base.html". you may need to add `<script type="text/javascript" src="/path/to/jquery.js"></script>` before it
Decorator to preserve view from logged users.
A relatively simple Photo model which generates its own thumbnail when saved. A default size is specified as `thumb_size` in the `save()` arguments. Other thumbnailing strategies don't save the thumbnail dimensions, and since the actual dimensions of the thumbnail created by PIL's `thumbnail` method are somewhat non-deterministic, it is difficult to create an `img` tag with proper height and width attributes. This approach makes that task simple. This approach works well if only one thumbnail size is required. It could easily be adapted to support two or three thumbnail sizes, but adding more sizes would quickly get unwieldy. This was adapted from http://biohackers.net/wiki/Django1.0/Thumbnail
Often I want to call a custom manager method in the template, something like Snippet.objects.get_latest(). I hate writing custom templatetags to do all that work, so instead I've written a filter that will work for any. Here's how I use it: {% for snippet in "cab.snippet"|call_manager:"top_rated"|slice:":5" %}
A zero-boilerplate generalisation of http://djangosnippets.org/snippets/2114/
Decorator adding arbitrary HTTP headers to the response. This decorator adds HTTP headers specified in the argument (map), to the HTTPResponse returned by the function being decorated. Example: @headers({'Refresh': '10', 'X-Bender': 'Bite my shiny, metal ass!'}) def index(request): ....
I wanted a simple way to display events for a given month in a calendar, so I adapted some code to write a template tag. `Event` is the model class, and it needs to have a `date_and_time` field. Each event is part of a `Series`, so in the view you can filter events by which series, or display events for all known Series. [Full explanation and description of simple Django event calendar template tag](http://williamjohnbert.com/2011/06/django-event-calendar-for-a-django-beginner/).
You just use standart django query terms, for example: <form> <input class="field_text filter_from" type="text" name="cost__gte" placeholder="from" value="{% if request.GET.cost__gte %}{{ request.GET.cost__gte }}{% endif %}"> <input class="field_text filter_to" type="text" name="cost__lte" placeholder="to" value="{% if request.GET.cost__lte %}{{ request.GET.cost__lte }}{% endif %}"> </form> model: class Object(models.Model): cost = models.IntergerField() objects = ObjectManager()
nothing to see here...
In templates sometimes you need to display some menu by checking whether the user is logged in or not. So use the above filter as shown below {% with request|check_login as logout %} {% if logout%} display something.... {% endif %} {% endwith %}
View mixin and utils to generate PDF documents from html using *xhtml2pdf*. The most interesting thing here is *PDFTemplateResponseMixin*. Adding this mixin to class based views allows automatic pdf generation using the view context and a customized template. There is also the lower level function *render_to_pdf*, similar to what can be seen in [snippet 659](http://djangosnippets.org/snippets/659/). See the docstrings for a detailed explanation.
Sometimes we may need to generate a *ModelChoiceField* in which choices are generated at runtime, depending on the locale language. The snippet generates a *ChoiceField* based on a queryset and a specific attribute of the Model, ordering the choices by the attribute content in the locale language. **Usage example** (inside a form declaration) country = LazyModelChoiceField(sort_by='name', queryset = \ Country.objects.all, empty_label=_('All countries'), label=_('Country')) Based on lsbardel LazyChoiceField implementation (snippet 1767)
It's a pain to import all the Django models you want to use in the Python shell every time you start it. Here's how you can get IPython to autoload all your Django models for you every time you start the shell using ./manage.py shell. Put the code in a .py file in the root of your project. Then tell IPython to load the script in ~/.ipython/ipythonrc in the "Python files to load and execute" section.