Make Django admin `filter_horizontal` widget disabled

Question

I have a question regarding admin customization

For example I have a following model with m2m on itself via through model

class Company(models.Model):
    some fields here…
    more fields …
    
    known_carriers = models.ManyToManyField(
            "self",
            through=’OtherModel’,
            through_fields=('field1', 'field2'),
            related_name='known_customers',
            symmetrical=False,
    )

and admin on this model

@admin.register(models.Company)
class CompanyAdmin(admin.ModelAdmin):
    …
    … 
    filter_horizontal = (
        ...
            'known_carriers',
        ...
    )
    …
    ...

known_carriers in this admin is rendered as a nice widget specifying on a left side list of available model instances to add to m2m and on a right side ones have already added.

Question is – is it possible to render same widget in admin but disabled, that is without possibility to move elements from left to right side and in opposite direction by mouse click or by clicking on arrows. Only nice representation is needed.

Thank you.

P.S. adding it to readonly_fields basically changes widget to SelectMultiple(with different simple layout), so this is not an option.

WITHIN READONLY

irene christodoulou irene christodoulou · Accepted Answer · 2021-11-25T17:10:32

You can try to add it as read only field. See here https://docs.djangoproject.com/en/3.2/ref/contrib/admin/#django.contrib.admin.ModelAdmin.fields

Make Django admin `filter_horizontal` widget disabled

1 Answers