Dynamic Template Loader

This snippet provides support for dynamically importing templates. This helps you to avoid naming collisions and other problems. The format is as follows: 1. `module.submodule.app:template.html` 2. `module.submodule.app:subfolder/template.html` 3. `module.submodule.app:/subfolder/template.html` Assuming the module is located in '/var/', these would map (respectively) to: 1. `/var/module/submodule/app/templates/template.html` 2. `/var/module/submodule/app/templates/subfolder/template.html` 3. `/var/module/submodule/app/templates/subfolder/template.html` The colon splits the the python module from the template directory, meaning you can import from anything that has a "templates" directory. This helps me to avoid naming collisions by specifying the application I'm referring to, without having to put long paths in my extends and include tags inside other templates. It's also dynamic in that if I move a library outside the old path, it has no effect on the templates. To get this rolling, in your `settings.py` file, add the following:: >TEMPLATE_LOADERS = ( > 'addons.template_loader.load_template_source', # <--- add this > 'django.template.loaders.app_directories.load_template_source', > 'django.template.loaders.filesystem.load_template_source', ># 'django.template.loaders.eggs.load_template_source', >)

• template
• dynamic
• import
• loader

Sun 11 Jul 2010 Read More

Add Extra Headers to Test Client Requests

As Simon Willison mentions in his [Debugging Django](http://simonwillison.net/2008/May/22/debugging/) presentation, using the Test Client in the interpreter can be a great way to take a peek at the raw results from a view. In some cases you may need to add additional headers to the request (for instance a piece of middleware may rely on them). Though it is not mentioned in the reference documentation, a quick peek at the code confirmed my hopes that it would be possible to add data to the request. The Client *get* and *post* methods both accept an **extra** kwargs parameter that allow you to populate the request with additional data.

• testing
• request
• test
• headers

Tue 10 Feb 2015 Read More

Django Database Migration Management Script

Script to help manage database migrations. Explanation and background can be found in blog post at [paltman.com](http://paltman.com/2008/07/03/managing-database-changes-in-django/).

• database
• utility

Tue 28 Dec 2010 Read More

@reply links in Twitter messages

This template filter is rewritten, courtesy of Eric Moritz. It is meant to be used when displaying status messages from Twitter. A regular expression is used to replace all @username replies with a link to that user's Twitter page. In use at [http://ryanberg.net/blog/statuses/](http://ryanberg.net/blog/statuses/)

• twitter

Sun 11 Jul 2010 Read More

in_group template filter

Allows you to search if a user belongs to a given group. Along the same lines as snippet [390](http://www.djangosnippets.org/snippets/390/), but uses a regular ``if`` tag so it is more flexible. (Updated for efficiency. Running a boolean test on a QuerySet avoids a bit of unnecessary overhead.) (Updated to accept a list of groups.)

• template
• filter
• group

Mon 03 Sep 2012 Read More

login_required for a generic view in URLconf

If you use generic views for authenticated users, you must remember to ensure that the generic views are for auth users.

• generic
• urlconf

Mon 01 Nov 2010 Read More

Restrict Middleware

This is a _very basic_, _easily foolable_, restriction method implemented in a Django middleware. However, for low security sites that need a cursory barrier to entry (without the ability to assign/administer user accounts), this does very well. All of the features are fairly well-documented in the code.

• whitelist
• restrict
• reject

Wed 22 Aug 2012 Read More

Update All Apps to Latest Revision

A simple script that I have put in my Django applications directory to fetch the latest application code from git and svn. For example, your directory structure might look like so: django-apps/ django-tagging/ django-pagination/ django-registration/ django-threadedcomments/ django-mptt/ update_apps.py Where update_apps.py is the source of this snippet. To run, simply execute: # python update_apps.py And the script will iterate through all of your apps and update them to the latest version.

• script
• update
• apps
• project
• svn
• git

Sun 11 Jul 2010 Read More

Class ModelInfo for show object info

This class works in compatibility with a ModelForm, but instead of show a form, it shows the field values. The Meta class attributes can be used to customize fields to show, to be excluded, to divide by sections, to urlize text fields, etc. **Example 1:** class InfoSingleCertificate(ModelInfo): class Meta: model = SingleCertificate sections = ( (None, ('vessel','description','document','comments','status',)), ('Issue', ('issue_date','issue_authority','issue_location',)), ) **Example 2:** class InfoSingleCertificate(ModelInfo): class Meta: model = SingleCertificate fields = ('vessel','description','document','comments','status', 'issue_date','issue_authority','issue_location',) **How to use:** Just save this snippet as a file in your project, import to your views.py module (or a new module named "info.py") and create classes following seemed sytax you use for ModelForms.

• forms
• model
• display
• modelforms
• info
• values

Mon 06 Jul 2015 Read More

(en-US) Humanized Decimal Field

Simple DecimalField class extension that automatically adds formatting and validation for comma-separated "decimals". Works wonderfully for price fields. Could be extended to strip dollar signs or to be locale-agnostic.

• form
• humanize
• field
• comma
• decimal
• thousands
• separator
• input

Thu 15 Jul 2010 Read More

Read more link

I couldn't find any code for a blog-style "Read more after the jump," so I made a custom filter. It will look for **<!--more-->** for the jump, like in Wordpress. In **settings.py** set **READ_MORE_TEXT** to what you want the text of the link to be. `READ_MORE_TEXT = 'Read more after the jump.'` When you call the filter in your template, pass it the absolute link of that entry. Of course, you have to have your **get_absolute_url** function defined in your model, but you should have that already, right? :P In this example **entry.body** is the content of the blog entry. `{% load blog_filters %}` `{{ entry.body|read_more:entry.get_absolute_url }}` If anyone has a better way to do this, it is, of course, welcome.

• template
• filter
• blog
• find
• jump
• read
• more

Wed 15 Feb 2012 Read More

Add multiple parameters to the current url

Add multiple parameters to the current url.<br /> **Usage:**<br /> `{% addparam name1 value1 name2 value2 %}`<br /> or<br /> `{% addparam "name1" value1 "name2" value2 %}`<br /> variable can be use inplace of names and values<br /> example: <br />`{% addparam "view" message.id %}`

• url
• templatetags
• parameter

Sun 11 Jul 2010 Read More

Google Charts Templatetags (Python)

The core templatetags for my project [google-chartwrapper](http://code.google.com/p/google-chartwrapper/). It is an easy method of creating dynamic GoogleCharts from the [GoogleChartAPI](http://code.google.com/apis/chart/). To get the most recent version: `svn checkout http://google-chartwrapper.googlecode.com/svn/trunk/` and run `python setup.py` in the downloaded trunk directory. There is an included django project there with the [ChartsExamples](http://code.google.com/p/google-chartwrapper/wiki/ChartExamples) all worked out in django templates

• templatetags
• google
• chart

Sun 11 Jul 2010 Read More

ActiveManager: filter objects depending on publication and/or expiration dates

This manager is intended for use with models with publication and/or expiration dates. Objects will be retrieved only if their publication and/or expiration dates are within the current date. Use is very simple: class ExampleModel(models.Model): publish_date = models.DateTimeField() expire_date = models.DateTimeField(blank=True, null=True) objects = models.Manager() actives = ActiveManager(from_date='publish_date', to_date='expire_date') ExampleModel.actives.all() # retrieve active objects according to the current date The manager works correctly with nullable date fields. A null publication date means "*always published (until expiration date)*" and a null expiration date means "*never expires*". Most models should define the `objects` manager as the default manager, because otherwise out of date objects won't appear in the admin app.

• model
• manager
• active
• publication
• expiration
• date-filter

Sun 11 Jul 2010 Read More

3rd Party App Directories

How to make this work: * Put the code into your settings.py (or even better, local_settings.py if you have one) * Put 3rd party apps you'd like to use into the directories specified in APP_DIRS. * Place 'appname', into INSTALLED_APPS. Just a little trick I use to keep from having to install apps via setup.py; I can just stick apps into arbitrary locations and use them. I also do this to keep single copies of 3rd party apps I use in multiple projects (but again without installing to the global python path). No idea if this is bad practice or anything, but I find it useful.

• settings
• apps
• applications

Sun 11 Jul 2010 Read More