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All snippets written in Python

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Django admin autoregister

Official GitHub page: https://github.com/Mimino666/django-admin-autoregister One call to autoregister_admin() automatically creates and registers admin views for all the models in the specified module with intelligent linking between ForeignKey, OneToOneField and ManyToManyField fields.

  • models
  • admin
  • auto
  • autoregister
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Plaintext password

Plaintext password hasher (encoded string: plain$1$mysecretpass). DANGEROUS!!! Use just if you know what you are doing!

  • password
  • hashes
  • plaintext
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Email backend to BCC all emails

The backend lets you quickly get an idea of all emails that are sent out. Helpful for debugging or keeping an archive of all communications. Use instead of Django's SMTPBackend.

  • email
  • backend
  • bcc
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Test runner that installs 'tests' packages as apps

Ever tried to unit test custom fields or abstract models? If so, you probably used a solution like [this one](http://djangosnippets.org/snippets/2843/). It surely works, but it has some issues: 1. Runs 'syncdb' several times. 2. It's not automatic. You must add the mixin or copy the code to each of the TestCases. This test runner adds to INSTALLED_APPS the 'app.tests' package for **each of the specified** apps, **before the 'syncdb' happens**. This has the [discovery runner](https://pypi.python.org/pypi/django-discover-runner) as a dependency (for 1.5 only, it will be the default in 1.6). However, it comes as a mixin so it should be easily pluggable to other test runners. If you intend to use the mixin with other runners, note that it imports 'app.tests.models' so it won't work with tests modules (tests.py). Your runner must "use" test packages (like discovery runner). # USAGE # in your settings.py: TESTAPPS_INSTALL = ( 'app1', 'app2', # ... ) TEST_RUNNER = 'testapp_runner.DiscoverTestAppRunner' # example import path # extra apps in command line. # run test for apps 'app1' to 'app4', adding 'app3' and 'app4' to the TESTAPPS_INSTALL setting. manage.py test app1 app2 app3 app4 --with-test-app=app3 --with-test-app=app4

  • django
  • testing
  • apps
  • testrunner
  • test-runner
  • app-models
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Accessing URL variable from within a Form

**Use case:** Suppose you are working on maintenance screens on some data objects. On one particular page (a form) you want to have exits directly back to a calling page (as a cancel operation) or indirectly back to the calling page (after an data update operation). However, the form and its object are not directly related to the target page (perhaps a one-to-many relationship) so you cannot figure the calling page from object data - but the target object IS referenced in the url. ** How To:** To make this work, we need to pick out a variable from the URL of the current page and use it to generate the URL of the target page. 1. [urls.py] Models *Banker* and *Iaccount* are related as One-to-Many so if we are creating an *Iaccount* we cannot usually determine the *Banker* object to return to. In this example, URL1 contains the variable `iid` - the primary key to the Banker object; this will render a create form. We want to be able to reference URL2 from this form. 2. [views.py: get_initial] We can access the variable we want with `self.kwargs['iid']` and use it to set the initial value of the `ident` fields which links back to the *Banker* object 3. [views.py: get_success_url] In the same way we can pass the value into the form's *success_url* to point at URL2 4. [template] In the template, we can also access the variable now as `form.ident.value` so we can construct a *Go Back* link to URL2 Thanks to Thomas Orozco for leading the way.

  • url
  • form
  • cbv
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Create a random integer in a template

Create a random integer with given length. - For a length of 3 it will be between 100 and 999. - For a length of 4 it will be between 1000 and 9999. Use it in a template like: {% random_number as my_id %} The id is {{ my_id }}

  • template
  • django
  • templatetag
  • integer
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Logging to rotating files

It took me some time to figure out how to set up logging in Django. What I want to do is to log to a pair of rotating files each 1MB in size. What I come up with is this code segment in the `settings.py` file.

  • settings
  • logging
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Many 2 Many Admin Ordering with Mysql

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.

  • admin
  • mysql
  • m2m
  • ordering
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A Lazy ModelChoiceField implementation

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)

  • forms
  • model
  • field
  • ModelChoiceField
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South unran migration check

Middleware that checks if you ran all South migrations. If not, it will throw an exception. Make sure to only use this middleware in development!

  • middleware
  • migration
  • south
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model queries to Google Visualization DataTables

Helper functions to use the Google Visualization API in Django. Module stores queries to use and creates a JSon representation of a Google Visualization DataTable for each by inspecting the query's model. Looks up any choices defined for the columns. Depends on Google Visualization Python API: https://code.google.com/p/google-visualization-python/ To use, define the queries to use with the Visualization API at the head of views.py with: add_query(queryset, 'query name') then in view functions, get the JSon representation of a Google Visualization DataTable for the query with: my_json = get_viz_json('query name') Within the HTML template, pipe the JSon through safe: var dataTable = new google.visualization.DataTable( {{ my_json|safe }} );

  • Google Visualization
  • charts
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