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Generic admin action export selected rows to excel

Based on [http://djangosnippets.org/snippets/1697/](http://djangosnippets.org/snippets/1697/) but improved with multiline fields, and unicode chars. Also it generates an xls file, not a csv one. Requires, pyExcelerator *Usage:* Add the code to your project, e.g. a file called actions.py in the project root. Register the action in your apps admin.py: from myproject.actions import export_as_xls class MyAdmin(admin.ModelAdmin): actions = [export_as_xls]

  • export
  • admin-actions
  • xls
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Multiple inheritance of newforms and modelforms

If you try to use multiple inheritance with a modelform (to mix in some fields from an already existing form class for example) you'll get the following rather terrifying error: > "Error when calling the metaclass bases metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases" The solution is to first create the ModelForm, then create a NEW class that inherits from both the ModelForm and the form you want to mixin, then finally apply the recipe from here: [http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/204197](http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/204197)

  • newforms
  • inheritance
  • modelforms
  • multipleinheritance
  • metaclasses
  • metaclass
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Decorator

[Understanding Python Decorators in 12 Easy Steps!] (http://simeonfranklin.com/blog/2012/jul/1/python-decorators-in-12-steps/)

  • decorator
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Controller Class for Views

I wanted to be able to share common code among a subset of views without copy-and-pasting the code or the same function into each view, so I decided to wrap a class around the views so that the common code (i.e. loading a model that each of the views would affect) can go in the __init__ of that class. I created the controller_view function above to allow the urls to access those class methods. It would be called something like this: url(r'^someview$', controller_view(SomeController, 'someview'), name='someview'), Where the SomeController inherits (or is structured like) the Controller class above and implements __init__ and someview as methods. I'm new to Django so it's entirely possible I've missed something that already does this or that makes this unnecessary. If so, let me know so that I can figure out how to do this right, otherwise, hopefully this is helpful to someone else out there.

  • urls
  • views
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Base64Field: base64 encoding field for storing binary data in Django TextFields

This Base64Field class can be used as an alternative to a BlobField, which is not supported by Django out of the box. The base64 encoded data can be accessed by appending _base64 to the field name. This is especially handy when using this field for sending eMails with attachment which need to be base64 encoded anyways. **Example use:** class Foo(models.Model): data = Base64Field() foo = Foo() foo.data = 'Hello world!' print foo.data # will 'Hello world!' print foo.data_base64 # will print 'SGVsbG8gd29ybGQh\n'

  • django
  • model
  • field
  • base64
  • blob
  • base64field
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Add querystring parameters to path (template tag)

`<h3>Page: {{ page.number }} of {{ page.paginator.num_pages }}</h3> {% if page.has_previous or page.has_next %} <div> {% if page.has_previous %} <a href="{% url_add_query page=page.previous_page_number %}">{% endif %}&laquo; Previous {% if page.has_previous %}</a>{% endif %} | {% if page.has_next %} <a href="{% url_add_query page=page.next_page_number %}">{% endif %} Next &raquo;{% if page.has_next %}</a>{% endif %} </div> {% endif %}`

  • template
  • templatetag
  • pagination
  • request
  • querystring
  • query-string
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Gravatar support in model save override

Overridden save() method that adds Gravatar support for a user with a profile photo field (and presumably an email field). Checks to see if user has provided a photo. If not, then query Gravatar for a possible photo. Finally, if Gravatar does not have an appropriate photo for this user, then use whatever default photo is available (in this case, 'users/photos/default_profile_photo.png'... change as necessary).

  • model
  • save
  • override
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Forms splitted in fieldsets

This template tag build a Form splitted in fieldsets. The fieldsets are configured with a second parameter, that is a tuple like the one used in the Admin class in models in the attribute "fields". You pass to the template the form and the tuple and than use them as parameters for the templatetag. You can take a look at the source and modify It to build forms the way you like. It is very useful If you do not like the way Django build forms with the methods as_p, as_ul or as_table and also do not like to write html by hand.

  • forms
  • fieldset
  • form
  • fieldsets
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paginator using url tag

Example for provided django-tagging url snippet: {% paginator 4 image_tag_paged tag=tag page %} links then equals {% url image_tag_paged tag=tag,page=n %}

  • tag
  • pagination
  • url
  • paginator
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django-pagination with "clean url"

To enable "clean url" mode, install [django-pagination](http://code.google.com/p/django-pagination/), then just add to settings.py PAGINATION_CLEAN_URL = True and replace '.../pagination/templatetags/pagination_tags.py' with follow, and so add to 'pagination/templates/pagination/' folder pagination_clean_url.html file, with following code **Note:** in urls.py should be like this: url(r'^/foo/bar/\d*/?$', foobar_list_handle),

  • pagination
  • clean url
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Load File From URL Widget

Rather simple usage, modelforms/in the admin: class CustomAdminForm(forms.ModelForm): class Meta: model = Something widgets = { 'image': URLFileInput(default_exts=[".png", ".gif", ".jpg"]), } class SomethingAdmin(admin.ModelAdmin): form = CustomAdminForm admin.site.register(Something, SomethingAdmin) Basically, this will pull the image from the URL instead of only pulling it from your harddrive for upload. Also accepts optional default_exts argument which limits the file types. Defaults to images.

  • imagefield
  • filefield
  • urlfield
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