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Load initial form fields from GET parameters

It is often convenient to be able to specify form field defaults via GET parameters, such as /contact-us/?reason=Sales (where "reason" is the name of a form field for which we want a default value of "Sales"). This snippet shows how to set a form's initial field values from matching GET parameters while safely ignoring unexpected parameters.

  • forms
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Highlight matched search term

sterm is the search term. text is the result search text. it will highlight every matched search term in search result. please define your own .yellow css class. use: {{search_result_var|highlight:search_term}}

  • highlighting
  • custom-template-tag
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Conditional INSTALLED_APPS entry

Some INSTALLED_APPLICATIONS applications may not be critical for your website to work - for example you may only need them for development - like 'django_extensions' or 'debug_toolbar'. They needn't be installed actually for the site to work. This way you can avoid discussions with other developers if some application should be included, or is it just spam, because if they don't like it, they don't have to install it. On a production server you can leave this not installed, to avoid security concerns like a possibility to IP-spoof and see the debug toolbar.

  • configuration
  • settings
  • conditional
  • installed_apps
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Parsed RSS into template var

loads a parsed RSS feed (with feedparser) into a variable of choice. Caching by the "cache" template tag.

  • template
  • tag
  • templatetag
  • cache
  • rss
  • parse
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Multiple emails field

Model Field allowing to store multiple emails in one textual field. Emails separated by comma. All emails are validated. Works with Django admin.

  • multiple
  • email
  • validation
  • mail
  • multifield
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Email Auth

Yet another authentication by email address. This one is quick and dirty as we are saving email address in both Username and Email fields. For proper way how to deal with it see https://docs.djangoproject.com/en/1.6/topics/auth/customizing/#auth-custom-user

  • email
  • auth
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Ultimate(?) export/download CSV admin action

This owes a debt to a number of earlier snippets by myself and others, including: *(most directly)* [#2868](http://djangosnippets.org/snippets/2868/), plus [#2020](http://djangosnippets.org/snippets/2020/), [#2712](http://djangosnippets.org/snippets/2712/), [#1697](http://djangosnippets.org/snippets/1697/) Use of OrderedDict means it requires Python 2.7+. You also need to `pip install singledispatch` which is a backport of a Python 3.4 feature. Singledispatch (along with custom attributes instead of a factory function) gives a very clean interface in your ModelAdmin, whether or not you need a custom `short_description`. This version allows you to (optionally) specify custom column labels, or to (optionally) use Django's usual prettifying mechanism (`field.verbose_name`). Thanks to #2868 it can do relation-spanning double-underscore lookups and also model attribute/method (rather than field) lookups for columns, just like you can in your ModelAdmin `list_display`.

  • csv
  • admin-actions
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Exclusive boolean field

**NOTE: I now have a better implementation of this (nicer api, less signal wrangling) available [on PyPI here](https://pypi.python.org/pypi/django-exclusivebooleanfield)** Sometimes you want to be able to make one (and only one) row in your model 'featured' or 'the default one' If you have some kind of parent model you could have a ForeignKey on the parent to hold that info, but that won't always be the case - eg you may have no parent, or multiple parent models. With the exclusive_boolean_fields() helper you can do it with or without a parent model and it possibly makes the admin interface a bit simpler.

  • field
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yet another render_to_response decorator

This one takes a template path as an argument. Return dictionary with template values from your view. It's simple as: @render_to_template('posts/post_list.html') def api_get_all(request): return {'test': 'testing!'}

  • render_to_response
  • decorator
  • response
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File Mimetype Validator (Using python-magic)

This validator works well with FileField form fields and can validate that an uploaded file has an acceptable mimetype. Place this snippet in your app's `validators.py`. Requirements: This snippet uses [python-magic](https://github.com/ahupp/python-magic). To install: pip install python-magic Usage (in forms.py): from validators import MimetypeValidator class MyForm(forms.Form): file = forms.FileField( allow_empty_file=False, validators=[MimetypeValidator('application/pdf')], help_text="Upload a PDF file" )

  • validation
  • upload
  • magic
  • mimetype
  • FileField
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