Login

3110 snippets

Snippet List

Django Dictionary Model

This is a model that implements (most of) the python dictionary interface. Meaning, you can work with this model exactly like a python dictionary, and it handles querying the database for it's values, saving/deleting the helper objects, etc. I wrote this originally when I needed to store an arbitrary dictionary in the database, and decided to work it up into a near-complete implementation of a dictionary. In order to make sure that the dictionary is the most optimized possible, I have a static method that can be used for retrieval. Feel free to ignore it if you don't care about optimizing database queries. Here's an example: Python 2.6.1 (r261:67515, Jun 24 2010, 21:47:49) [GCC 4.2.1 (Apple Inc. build 5646)] on darwin Type "help", "copyright", "credits" or "license" for more information. (InteractiveConsole) >>> from binder.models import Dictionary >>> d = Dictionary.getDict('Foobar') >>> print d {u'Foobar': u'omgbbq', u'HAHAHAH': u"who's afraid of a big, black, bat?"} >>> d['pot'] = 'The kettle is black.' >>> print d {u'Foobar': u'omgbbq', u'pot': u'The kettle is black.', u'HAHAHAH': u"who's afraid of a big, black, bat?"} >>> print d['pot'] The kettle is black. >>> for k, v in d.iteritems(): ... print k +":", v ... Foobar: omgbbq HAHAHAH: who's afraid of a big, black, bat? pot: The kettle is black. >>> print d.keys() [u'Foobar', u'HAHAHAH', u'pot'] >>> print d.values() [u'omgbbq', u"who's afraid of a big, black, bat?", u'The kettle is black.'] >>> There's several more functions that I've implemented; check the code to see. (An interesting note: DictField saves immediately upon making a change, which is good to keep in mind in case that functionality isn't expected.) Hope someone finds this useful. :) --Chris

  • model
  • python
  • dict
  • dictionary
Read More

Combine ProfileForm an UserForm in one.

Using this method you can combine form for standart django.contrib.auth.models.User model and for your project profile model. As now, ProfileForm can be used as usual, and it will also contain UserForm fields.

  • forms
  • user
  • profile
Read More

Authentication Against Active Directory (LDAP) over SSL

I had some trouble getting other peoples code to work for AD support, so I wrote my own which authenticates against LDAP and will also use SSL and cert if required. It will also verify that an autheticated user has specific group membership before authorizing. This will also debug to a file, which is really helpful when trying to figure out problems. One thing that really got me when getting python-ldap to work was that you must have "ldap.set_option(ldap.OPT_REFERRALS,0)" set or any ldap search will not work. Also, this will add group permissions to a user.

  • authentication
  • ssl
  • ldap
  • active-directory
Read More

Template tag "ifregex" and "ifnotregex"

Outputs the contents of the block if the second argument matches (or not, depending on the tag) the regular expression represented by the first argument. Usage: {% ifregex "^/comments/" request.path %} ... {% endifregex %} {% ifnotregex "^/comments/" request.path %} ... {% else %} ... {% endifnotregex %}

  • template
  • templatetag
  • regex
  • ifregex
Read More

instant 'master' admin site

The newforms-admin branch (to be merged by 0.97, I think) is very nice to work with, separating models from the admin. It is trivial to create an admin site that includes every app that is installed. Note that you also get all your docs for things like template tags, etc.

  • admin
  • newforms-admin
Read More

ModelChoiceField with choice groups for recursive relationships

Note: must call within __init__() method, so you must do self.fields["field"] = ModelChoiseField(...). This is because I did not use a ModelChoiceIterator. A subclass of ModelChoiceField which represents the tree level of each node when generating option labels. It's limited to one level of nesting, if you need more, you should consider the django-mptt package. For example, where a form which used a ModelChoiceField: category = ModelChoiceField(queryset=Category.objects.all()) ...would result in a select with the following options: --------- Root 1 Root 2 Child 1.1 Child 1.2 Child 2.1 Using a NestedModelChoiceField instead: category = NestedModelChoiceField(queryset=Category.objects.all(), related_name='category_set', parent_field='parent_id', label_field='title') ...would result in a select with the following options: Root 1 --- Child 1.1 --- Child 1.2 Root 2 --- Child 2.1

  • ModelChoiceField
Read More

Support disabling options in a select widget

Provide the ability to disable a select option with Django2. This can be done during the widget initialization (i.e when the widget field is created) or during form initialization. This will disable the select option based on a context or by specifying the values that should be disabled.

  • widgets
  • django-forms
Read More

Auth decorators with 403 - Django 1.11

This decorator is based on user_passes_test, but when a user is logged in and fails the test, it will render a 403 error instead of redirecting to login - only anonymous users will be asked to login. Version working with Django 1.11, based on version found on [https://djangosnippets.org/snippets/254/] , which is deprecated.

  • auth
  • user_passes_test
  • 403 permission_required
Read More

DRF - Optimizing ModelViewSet queries

Using Django REST Framework for Model views there is always the issue of making duplicated queries without either prefetching the objects that will be accessed using the serializer and as such will lead to large number of queries being made to the database. This will help in optimizing the queryset used for the viewset by accessing the `_meta.fields` property of the serializer.

  • django
  • rest
  • rest-api
  • django-rest-framework
Read More

ModelChoiceField & ModelMultipleChoiceField with optgroups

Fields that support HTML optgroups. Adapted from [this snippet](https://djangosnippets.org/snippets/1968/) and updated to work with latest version of Django (1.9) and additional ModelMultipleChoiceField support added. Example Usage: tag = GroupedModelChoiceField(queryset=Tag.objects.all(), group_by_field='parent') positions = GroupedModelMultiChoiceField(queryset=Position.objects.all(), group_by_field='agency')

  • fields
  • optgroup
Read More