Fixed #10898 -- Corrected minor error in conditional view processing example. Thanks to Tomasz Elendt for the report.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@10642 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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@ -59,10 +59,10 @@ The ``condition`` decorator's signature looks like this::
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The two functions, to compute the ETag and the last modified time, will be
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passed the incoming ``request`` object and the same parameters, in the same
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order, as the view function they are helping to wrap. The function passed
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``last_modified`` should return a standard datetime value specifying the last
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time the resource was modified, or ``None`` if the resource doesn't exist. The
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function passed to the ``etag`` decorator should return a string representing
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the `Etag`_ for the resource, or ``None`` if it doesn't exist.
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``last_modified_func`` should return a standard datetime value specifying the
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last time the resource was modified, or ``None`` if the resource doesn't
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exist. The function passed to the ``etag`` decorator should return a string
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representing the `Etag`_ for the resource, or ``None`` if it doesn't exist.
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Using this feature usefully is probably best explained with an example.
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Suppose you have this pair of models, representing a simple blog system::
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@ -83,10 +83,8 @@ add a new blog entry, you can compute the last modified time very quickly. You
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need the latest ``published`` date for every entry associated with that blog.
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One way to do this would be::
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from django.db.models import Max
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def latest_entry(request, blog_id):
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return Entry.objects.filter(blog=blog_id).aggregate(Max("published"))
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return Entry.objects.filter(blog=blog_id).latest("published").published
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You can then use this function to provide early detection of an unchanged page
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for your front page view::
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