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Fixed #18388 - Added InlineModelAdmin.get_max_num hook.

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Thanks d.willy.c.c@ for the suggestion and Melevir and Areski Belaid for work
on the patch.
This commit is contained in:
Tim Graham 2013-06-01 18:16:57 -04:00
parent 07a73a2714
commit 61524b09cf
5 changed files with 47 additions and 5 deletions
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26
docs/ref/contrib/admin/index.txt
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@ -1728,6 +1728,11 @@ The ``InlineModelAdmin`` class adds:
doesn't directly correlate to the number of objects, but can if the value
is small enough. See :ref:`model-formsets-max-num` for more information.
.. versionadded:: 1.6
:meth:`InlineModelAdmin.get_max_num` also allows you to customize the
maximum number of extra forms.
.. attribute:: InlineModelAdmin.raw_id_fields
By default, Django's admin uses a select-box interface (<select>) for
@ -1787,6 +1792,27 @@ The ``InlineModelAdmin`` class adds:
return extra - obj.binarytree_set.count()
return extra
.. method:: InlineModelAdmin.get_max_num(self, request, obj=None, **kwargs)
.. versionadded:: 1.6
Returns the maximum number of extra inline forms to use. By default,
returns the :attr:`InlineModelAdmin.max_num` attribute.
Override this method to programmatically determine the maximum number of
inline forms. For example, this may be based on the model instance
(passed as the keyword argument ``obj``)::
class BinaryTreeAdmin(admin.TabularInline):
model = BinaryTree
def get_max_num(self, request, obj=None, **kwargs):
max_num = 10
if obj.parent:
return max_num - 5
return max_num
Working with a model with two or more foreign keys to the same parent model
---------------------------------------------------------------------------