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[soc2009/multidb] Merged up to trunk r11756.

git-svn-id: http://code.djangoproject.com/svn/django/branches/soc2009/multidb@11758 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Alex Gaynor
2009-11-21 06:55:11 +00:00
parent 2bc7422b52
commit e9e73c4b68
198 changed files with 5793 additions and 1878 deletions

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@@ -94,9 +94,8 @@ See the docs for :meth:`~django.db.models.QuerySet.latest` for more.
.. versionadded:: 1.1
Defaults to ``True``, meaning Django will create the appropriate database
tables in :ref:`django-admin-syncdb` and remove them as part of a :ref:`reset
<django-admin-reset>` management command. That is, Django *manages* the
database tables' lifecycles.
tables in :djadmin:`syncdb` and remove them as part of a :djadmin:`reset`
management command. That is, Django *manages* the database tables' lifecycles.
If ``False``, no database table creation or deletion operations will be
performed for this model. This is useful if the model represents an existing

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@@ -1132,6 +1132,17 @@ Aggregation <topics-db-aggregation>`.
.. _field-lookups:
``exists()``
~~~~~~~~~~~~
.. versionadded:: 1.2
Returns ``True`` if the :class:`QuerySet` contains any results, and ``False``
if not. This tries to perform the query in the simplest and fastest way
possible, but it *does* execute nearly the same query. This means that calling
:meth:`QuerySet.exists()` is faster that ``bool(some_query_set)``, but not by
a large degree.
Field lookups
-------------