Re: Tweak admin widget - FilteredSelectMultiple

On 5/01/2020 11:42 am, Mike Dewhirst wrote:
> On 4/01/2020 9:03 pm, Integr@te System wrote:
>> Hi Mike,
>>
>> As we look at selected_choice result from iterating v over value
>> (line 428), option_value base on choice(line 438).
>> so we can limit input parameter of value variable from this def().
>
> selected_choices appear in the selected box on screen and choices
> appear in the available choices box.
>
> I can see how to tweak either of those if the method was my own. But
> it is an Admin method which interfaces with javascript to provide the
> user interface for making those selections.
>
> I think my original question was too brief.
>
> I'm thinking now I should be using my own version of AutocompleteMixin
> somehow and use formfield_for_manytomany when db_field == "groups" in
> my admin.py to get access to it.
>
> formfield_for_manytomany calls the AutocompleteSelectMultiple class
> which inherits AutocompleteMixin which has the optgroups() method
> which contains selected_choices and choices which are of interest to me.

Turns out the data I want to manipulate is encapsulated in widgets.py
FilteredSelectMultiple() where it returns context. That is called
directly from formfield_for_manytomany() so all I need to do is override
that in admin.py and tweak the context.

Thanks all who responded

Cheers

Mike

>
> That said, my question really is "Huh! How do I do that?"
>
> Maybe I'll do some experiments
>
> Thanks in advance if you can short-circuit my research
>
> Cheers
>
> Mike
>
>
>>
>> Hope if heplful.
>>
>>
>>
>> On Sat, Jan 4, 2020, 11:00 Mike Dewhirst <miked@dewhirst.com.au
>> <mailto:miked@dewhirst.com.au>> wrote:
>>
>>     In the Admin where user group membership is shown and groups can be
>>     selected from choices derived from auth_groups, I want to control
>> the
>>     available choices.
>>
>>     It seems the place to do so might be in admin/widgets.py in the
>>     AutocompleteMixin.optgroups() method a few lines in where it says
>> ...
>>
>>              choices = (
>>                  (obj.pk <http://obj.pk>,
>>     self.choices.field.label_from_instance(obj))
>>                  for obj in
>> self.choices.queryset.using(self.db).filter(pk__in=selected_choices)
>>              )
>>
>>     Could a very kind person explain to me how I can hijack this and
>>     remove
>>     a couple of groups from the resulting choices?
>>
>>     My use case is that I want members of the 'admin' group to be
>> able to
>>     assign any group membershipto any other userexcept for a couple of
>>     groups which are too permissive. The excepted groups can only be
>>     assigned by a Superuser.
>>
>>     Many thanks for any hints
>>
>>     Cheers
>>
>>     Mike
>>
>>
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