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Validator for data

This module is not aimed to replace the newforms, but I would like manually write html code, and just need a pure validate module, so I write this, and many things may be similar with newforms. So if you like me would only need a pure validator module, you can use it. And it has some different features from newforms: 1. Support validator_list parameter, so you could use it just like the old manipuator class 2. Supply easy method, such as `validate_and_save()`, so you can pass a request object, and get a tuple result `(flag, obj_or_error)`, if the `flag` is `True`, then the next value is an object; and if the `flag` is `False`, then the next value is error message. 3. Each field has a `validate_and_get` method, and it'll validate first and then return the result, maybe an object or error message. Just like above. 4. SplitDateTimeField is somewhat different from the newforms. For example:: c = SplitDateTimeField('date', 'time') print c.validate_and_get({'date':'2006/11/30', 'time':'12:13'}) So the first parameter is DateField's field_name, and the second parameter is TimeField's field_name. 5. Add yyyy/mm/dd date format support 6. Support default value of a field. You can add a default value for a field, if this field is not required, and the value is *empty*, Validator will return the default value. This module is new, so many things could be changed.

  • validator
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A couple of template filters for partitioning lists

People -- and by "people" I mean Jeff Croft -- often ask about how to split a list into multiple lists (usually for presenting as columns in a template). These template tags provide two different ways of splitting lists -- on "vertically", and the other "horizontally".

  • template
  • filter
  • lists
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Localized URLs (www-en)

An example on how we changed our localization middleware to use www-en.<domain> instead of it being hidden in the cookie. This also changes zh-cn to cn, and zh-tw to tw in the URLs. This is only a base snippet and you will most likely need to modify it to fit your needs.

  • internationalization
  • middleware
  • il8n
  • urls
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render_to_response wrapper

Simplifies using RequestContext in render_to_response. Simply call the wrapper with request as the first argument, and the rest of the arguments are as normal for render_to_response. ex: render_response(request, 'foo_list.html', {'foo': Foo.objects.all()})

  • render_to_response
  • requestcontext
  • shortcut
  • template
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Using manager methods

This is part of the user-registration code used on this site (see [the django-registration project on Google Code](http://code.google.com/p/django-registration/) for full source code), and shows a couple of interesting tricks you can do with manager methods. In this case there's a separate `RegistrationProfile` model used to store an activation key and expiration time for a new user's account, and the manager provides a couple of useful methods for working with them: `create_inactive_user` creates a new user and a new `RegistrationProfile` and emails an activation link, `activate_user` knows how to activate a user's account, and `delete_expired_users` knows how to clean out old accounts that were never activated. Putting this code into custom manager methods helps a lot with re-use, because it means that this code doesn't have to be copied over into different views for each site which uses registration, and also makes more sense in terms of design, because these are methods which need to "know about" the model and work with it, and so they belong in a place close to the model.

  • managers
  • registration
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Fetching top items

This is a method from the custom manager for the Snippet model used on this site; the basic idea is to be able to ask for the top `n` "foo", where "foo" is something related to Snippet. For example, you can use `top_items('tag')` to get the top Tags ordered by how many Snippets are associated with them. I have a feeling that I could get this down to one query, but haven't yet put in the time for it.

  • snippets
  • sql
  • managers
  • group-by
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