Django Admin: Add Hyperlink to related model

Question

I would like to add a hyperlink to the related model Training

It would be nice to have declarative solution, since I want to use this at several places.

The "pencil" icon opens the related model in a popup window. That's not what I want. I want a plain hyperlink to the related model.

BTW, if you use "raw_id_fields", then the result is exactly what I was looking for: There is a hyperlink to the corresponding admin interface of this ForeignKey.

Answer 1

Update Jan 4, 2023

From Django 4.1, this becomes a part of the official build (related PR).

Related widget wrappers now have a link to object’s change form

Result

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Previous Answer

The class named RelatedFieldWidgetWrapper is showing the icons on the Django Admin page and thus you need to override the same. So, create a custom class as below,

from django.contrib.admin.widgets import RelatedFieldWidgetWrapper


class CustomRelatedFieldWidgetWrapper(RelatedFieldWidgetWrapper):
    template_name = 'admin/widgets/custom_related_widget_wrapper.html'

    @classmethod
    def create_from_root(cls, root_widget: RelatedFieldWidgetWrapper):
        # You don't need this method of you are using the MonkeyPatch method
        set_attr_fields = [
            "widget", "rel", "admin_site", "can_add_related", "can_change_related",
            "can_delete_related", "can_view_related"
        ]
        init_args = {field: getattr(root_widget, field) for field in set_attr_fields}
        return CustomRelatedFieldWidgetWrapper(**init_args)

    def get_context(self, name, value, attrs):
        context = super().get_context(name, value, attrs)
        rel_opts = self.rel.model._meta
        info = (rel_opts.app_label, rel_opts.model_name)
        context['list_related_url'] = self.get_related_url(info, 'changelist')
        return context

See, the context variable list_related_url is the relative path that we need here. Now, create an HTML file to render the output,

#File: any_registered_appname/templates/admin/widgets/custom_related_widget_wrapper.html

{% extends "admin/widgets/related_widget_wrapper.html" %}
{% block links %}
    {{ block.super }}
    <a href="{{list_related_url}}">- Link To Related Model -</a>
{% endblock %}

How to connect?

Method-1 : Monkey Patch

# admin.py

# other imports
from ..widgets import CustomRelatedFieldWidgetWrapper
from django.contrib.admin import widgets

widgets.RelatedFieldWidgetWrapper = CustomRelatedFieldWidgetWrapper # monket patch

Method-2 : Override ModelAdmin

# admin.py
class AlbumAdmin(admin.ModelAdmin):
    hyperlink_fields = ["related_field_1"]

    def formfield_for_dbfield(self, db_field, request, **kwargs):
        formfield = super().formfield_for_dbfield(db_field, request, **kwargs)
        if db_field.name in self.hyperlink_fields:
            formfield.widget = CustomRelatedFieldWidgetWrapper.create_from_root(
                formfield.widget
            )
        return formfield

Result