Ticket #23250: 23250.diff

docs/ref/forms/fields.txt

@@ -1048 +1048 @@
 objects (in the case of ``ModelMultipleChoiceField``) into the
 ``cleaned_data`` dictionary of the form.
 
+For more advanced uses, you can specify ``queryset=None`` when declaring the
+form field, and populate the ``queryset`` in the form's ``__init__()`` method::
+
+    class FooMultipleChoiceForm(forms.Form):
+        foo_select = forms.ModelMultipleChoiceField(
+            label="Foo Selection",
+            help_text="Select a Foo from the choices above.",
+            queryset=None,
+        )
+
+        def __init__(self, *args, **kwargs):
+            super(FooMultipleChoiceForm, self).__init__(*args, **kwargs)
+            self.fields['foo_select'].queryset = ...
+
 ``ModelChoiceField``
 ~~~~~~~~~~~~~~~~~~~~