A FilterSpec that can be used to filter by taggit tags in the admin. To use, simply import this module (for example in `models.py`), and add the name of your TaggableManager field in the list_filter attribute of your ModelAdmin class.
When saving an edit to an object from a filtered list view you are, by default, returned to list view without any of your filters applied. This solves that problem, keeping the filtered view in a session variable until you reach a point where the session key is deleted. The solution presented here is hugely based off of other's work with most of the solution gained from: [Admin: return to change_list with filter and pagination applied](http://djangosnippets.org/snippets/2415/ "Admin: return to change_list with filter and pagination applied") This solution offered the best approach in our mind over the others listed here on snippets since the solution didn't require changes to template code...this is completely self contained within your own admin.py files. The advantage to our solution over the above linked solution is that under different use cases the user may or may not be redirected to the filtered list_view. For example, if you edit an object and click the save and continue button, then you would lose the filter when you finally finished editing the object and clicked save. Added on here is a delete of the session key when users add objects, the reasoning we're going this route is we don't want to return users to filtered views when they just added a new object. Your mileage may vary and if so, it's easy enough to fit your own needs. HTHs
A filter for general math operations.
Generate QR Code image from a string with the Google charts API http://code.google.com/intl/fr-FR/apis/chart/types.html#qrcodes Exemple usage in a template {{ my_string|qrcode:"my alt" }} will return the image tag with * src: http://chart.apis.google.com/chart?chs=150x150&cht=qr&chl=my_string&choe=UTF-8 * alt: my alt"
This patch adds a new admin Filter, for Filtering nullable fields. It adds 3 possible choices: 'All' (no filter), 'Null' (it applies field__isnull=True filter), and 'With Value' (it filters null values). This patch is interesting when you have a Integer or String fields and you want to filter wether a value is set or not. In other case, it would show too many filtering options. Remember this is a patch and you must modify a django file in `django/contrib/admin/filterspecs.py`
This module has two template filters allowing you to dump any template variable. Special handling for object instances. Pretty output. Usage: {% load dumper %} ... <pre>{{ var|rawdump }}</pre> or {% load dumper %} ... {{ var2|dump }} How to install: As usual, put into `<your-proj>/<any-app>/templatetags/dumper.py`.
You can add this code to a file named "field_attrs.py" in a templatetags folder inside an application. To use it, remember to load the file with the following template tag: {% load field_attrs %} And for each field you want to change the widget's attr: {{ form.phone|attr:"style=width:143px;background-color:yellow"|attr:"size=30" }}
Based on the discussion at Empty Thoughts (http://blog.michaeltrier.com/2007/8/6/age-in-years-calculation) I built a quick and dirty custom filter. Save this as a file in your "templatetags" folder. I called mine "calculate_age.py" and then in your template "{% load calculate_age %}" then use it, "{{ object.birthdate|age }}"
I just converted the autop filter from Drupal (which is itself based on a Wordpress filter) from PHP to Python. I had to change the format of the regular expressions a bit and make them raw strings, but otherwise the function is unchanged. It should work exactly like the original function.
Truncates a string after a given number of chars
Put inside `mysite/templatetags/getattr.py` Add `mysite` to your `INSTALLED_APPS` In your template: {% load getattr %} {{ myobject|getattr:"theattr,default value" }} Thanks to pterk for optimizations! \\o/
A *SimpleListFilter* derived class that can be used to filter by taggit tags in the admin. To use, simply add this class to the *list_filter* attribute of your ModelAdmin class. Ex.: class ItemAdmin(admin.ModelAdmin): list_display = ('name', 'unit', 'amount') list_filter = ('unit', TaggitListFilter) Based in [ModelAdmin.list_filter documentation](https://docs.djangoproject.com/en/dev/ref/contrib/admin/#django.contrib.admin.ModelAdmin.list_filter).
This filter will return data URI for given file, for more info go to: [wikipedia](http://en.wikipedia.org/wiki/Data_URI_scheme) Sample Usage: ` <img src="{{ "/home/visgean/index.png"|dataURI }}"> ` will be filtered into: ` <img src="data:image/png;base64,iVBORw0..."> ` This is good for small images.
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()
From: [incredible times](http://incredibletimes.org) With inspiration from: [Unethical Blogger](http://unethicalblogger.com/2008/05/03/parsing-html-with-python.html) This code parses any provided HTML content, and extracts a number of paragraphs specified, with all the content and tags inside them. Example: Template variable "content" contains: <a href="#>some text</a> <p><strong>Testing</strong>testing testing this is a tester's life</p> <div>I wont see the world</div> <p>Another paragraph</p> So, place this code in any loaded template module (inside a templatetags folder of your app... i.e. myapp/templatetags/myutils.py) {% load myutils %} {{ content|paragraphs:"1"}} Would return: <p><strong>Testing</strong>testing testing this is a tester's life</p> Whereas {% load myutils %} {{ content|paragraphs:"2"}} Returns: <p><strong>Testing</strong>testing testing this is a tester's life</p> <p>Another paragraph</p>