Clickable links to related readonly M2M instances in the admin

[alepimentel]

Code of Conduct

• I agree to follow Django's Code of Conduct

Feature Description

The feature is a small change in the AdminReadonlyField's contents method: Instead of joining the string representation of the related objects, join the admin_url's of them, just like with the ForeignKeys (or OneToOneFields).

Problem

When a ManyToManyField is readonly in a ModelAdmin, a list of the string representations of the related objects is shown. That isn't very useful, the idea would be to have a clickable link to be able to view the related object.

Request or proposal

proposal

Additional Details

No response

Implementation Suggestions

In the AdminReadonlyField.contents method, when the field is a many to many relationship and the value is set, the code is as follows:

    if isinstance(f.remote_field, ManyToManyRel) and value is not None:
        result_repr = ", ".join(map(str, value.all()))

The change would leave the code similar to this:

if isinstance(f.remote_field, ManyToManyRel) and value is not None:
    result_repr = "\n".join(
        map(
            lambda obj: self.get_admin_url(f.remote_field, obj),
            value.all(),
        )
    )

[github-actions]

Thank you alepimentel for sharing your idea! We have a lot of them so please be patient. You can see the current queue here.

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Reaction Guide

• 👍 This is something I would use
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