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Tag "filter"

177 snippets

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django-admin custom filter: IS NULL/IS NOT NULL

A simple django-admin filter to allow a boolean-like filter for IS NULL/IS NOT NULL. By default it applies to CharField, IntegerField, and FileField, but you can change this by editing NullFilterSpec.fields.

  • filter
  • admin
  • null
  • filterspec
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Variable inspect filter

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`.

  • template
  • filter
  • dump
  • variable
  • inspect
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cleat_list

Clear list from unwanted elements, within django template.

  • template
  • filter
  • list
  • clear
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is_in

I know in Django 1.2 we may acquire the same result using {% if value in arg %} but I need this filter in Django 1.1.

  • template
  • filter
  • django
  • contains
  • in
  • is
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RelatedNullFilterSpec: django-admin custom filter all/null/not null/choices

A simple django-admin filter to replace standar RelatedFilterSpec with one with the "All"/"Null"/"Not null" options. It applies to all relational fields (ForeignKey, ManyToManyField). You can put the code in the `__init__.py` or wherever you want. The `_register_front` idea is copied on [this snippet](http://djangosnippets.org/snippets/1963/)

  • filter
  • admin
  • null
  • filterspec
  • ManyToManyField
  • ForeignKey
  • not-null
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Fuzzy Date Diff Template Filter

Pass in a date and you get a humanized fuzzy date diff; e.g. "2 weeks ago" or "in 5 months". The date you pass in can be in the past or future (or even the present, for that matter). The result is rounded, so a date 45 days ago will be "2 months ago", and a date 400 days from now will be "in 1 year". Usage: * `{{ my_date|date_diff }}` will give you a date_diff between `my_date` and `datetime.date.today()` * `{{ my_date|date_diff:another_date }}` will give you a date_diff between `my_date` and `another_date` Make sure to install this as a template tag and call `{% load date_diff %}` in your template; see the [custom template tag docs](http://docs.djangoproject.com/en/dev/howto/custom-template-tags/) if you don't know how to do that.

  • template
  • filter
  • date
  • humanize
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Use class name in templates

For use in templates: {% if object|classname:"entry" %} ... class="{{ object|classname }}" ... I couldn't find simpler solution for checking weather specific object belongs to specific class name, or just to output object's class name.

  • filter
  • classname
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Analogue template filter to removetags that also removes the content of the tag

Django's builtin `removetags` filter removes the supplied tags, but leaves the enclosed text alone. Sometimes you need the complete tag, including its content to go away. Example: <h1>Some headline</h1> <p>Some text</p> Applying `removetags:"h1"` to this html results in Some headline <p>Some text</p> while `killtags:"h1"` leaves <p>Some text</p>

  • filter
  • removetags
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Functional Filters

I've been working on a project where I realized that I wanted to call methods on Python objects *with arguments* from within a Django template. As a silly example, let's say your application maintains users and "permissions" that have been granted to them. Say that permissions are open-ended, and new ones are getting defined on a regular basis. Your `User` class has a `check_permission(p)` method that return `True` if the user has been granted the permission `p`. You want to present all the users in a table, with one row per user. You want to each permission to be presented as a column in the table. A checkmark will appear in cells where a user has been granted a particular permission. Normally, in order to achieve this, you'd need to cons up some sort of list-of-dicts structure in Python and pass that as a context argument. Ugh! Here's how you'd use the `method`, `with`, and `call` filters to invoke the `check_permission` method from within your template. (Assume that you've provided `users` and `permissions` as context variables, with a list of user and permission objects, respectively.) <table> <tr> <th></th> {% for p in permissions %} <th>{{ p.name }}</th> {% endfor %} </tr> {% for u in users %} <tr> <td>{{ u.name }}</td> {% for p in permissions %} <td> {% if user|method:"check_permission"|with:p|call" %}X{% endif %} </td> {% endfor %} </tr> {% endfor %} </table> The `call_with` method is a shortcut for single-argument invocation; for example, we could have re-written the above as {% if user|method:"check_permission"|call_with:p %}...{% endif %} Anyway, this has been useful for me. Hope it's helpful for others! --chris P.S., tip o' the cap to Terry Weissman for helping me polish the rough edges!

  • filter
  • filters
  • function
  • object
  • method
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URL based breadcrumbs

This is a simple URL based breadcrumb filter I'm using on a site I'm currently building. To use it, just throw the code into template-tag file, and simply pass the current url in a page template like so {{ request.get_full_path|breadcrumbs }} As an example of how to style it, wrap it in a unordered list with an id of breadcrumb, and then in your styles use #breadcrumb li { display: inline; }. On a contact form for a site user, this will produce something along the lines of you are here : [home](/) » [users](/users/) » [username](/username/) » contact form Hopefully someone may find it useful.

  • filter
  • breadcrumbs
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admin filters as select boxes

This templatetag let's you output a form with select boxes instead of the ul's for filters. Uses some hacks to get the param names out of query strings. This would be a lot easier if filterspecs defined params instead of query strings (if filter tag would handle the encoding)

  • filter
  • admin
  • filterspec
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Author: gzy
  • -1
  • 3

slug_and_slash_to_dash - modified slugify for urls

This filter converts slashes to spaces in a a sting and then slugify's the result. However, it ignores leading and trailing slashes. For example, it can take something like this: /some/url/with-an-existing-slug/ And turn it into this: some-url-with-an-existing-slug The filter was originally written to use the *curent* url as the `disqus_identifier` for Disqus comments. For example: {{ request.META.PATH_INFO|slug_and_slash_to_dash }}

  • template
  • filter
  • slugify
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