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Diffstat (limited to 'docs/model-api.txt')
| -rw-r--r-- | docs/model-api.txt | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/docs/model-api.txt b/docs/model-api.txt index e4d3805236..5502bd51eb 100644 --- a/docs/model-api.txt +++ b/docs/model-api.txt @@ -626,7 +626,8 @@ option is ignored. ``default`` ~~~~~~~~~~~ -The default value for the field. +The default value for the field. This can be a value or a callable object. If +callable it will be called every time a new object is created. ``editable`` ~~~~~~~~~~~~ @@ -1814,14 +1815,15 @@ For example:: This example allows you to request ``Person.men.all()``, ``Person.women.all()``, and ``Person.people.all()``, yielding predictable results. -If you use custom ``Manager`` objects, take note that the first ``Manager`` -Django encounters (in order by which they're defined in the model) has a -special status. Django interprets the first ``Manager`` defined in a class as -the "default" ``Manager``. Certain operations -- such as Django's admin site -- -use the default ``Manager`` to obtain lists of objects, so it's generally a -good idea for the first ``Manager`` to be relatively unfiltered. In the last -example, the ``people`` ``Manager`` is defined first -- so it's the default -``Manager``. +If you use custom ``Manager`` objects, take note that the first +``Manager`` Django encounters (in the order in which they're defined +in the model) has a special status. Django interprets this first +``Manager`` defined in a class as the "default" ``Manager``, and +several parts of Django (though not the admin application) will use +that ``Manager`` exclusively for that model. As a result, it's often a +good idea to be careful in your choice of default manager, in order to +avoid a situation where overriding of ``get_query_set()`` results in +an inability to retrieve objects you'd like to work with. Model methods ============= |