Django Admin Actions on single object

Question

The admin actions seem to work on several items selected in the list view of django admin interface:

In my case I would like to have a simple action button on the change (one item) view.

Is there a way to make the django admin actions available there?

I know that I can walk around this problem by going to the list view, and select one item there. But it would be more nice to have it directly available.

Answer 1

Create a template for your model in your app.

templates/admin/<yourapp>/<yourmodel>/change_form.html

With this example content to add a button when changing an existing object.

{% extends "admin/change_form.html" %}
{% block submit_buttons_bottom %}
    {{ block.super }}
    {% if original %} {# Only show if changing #}
        <div class="submit-row">
            <a href="{% url 'custom-model-action' original.pk %}">
                 Another action
            </a>
        </div>
    {% endif %}
{% endblock %}

Link that action to any url and redirect back to your model change object view. More information about extending admin templates.

Update: Added complete common use case for custom action on existing object

urls.py

urlpatterns = [
    url(r'^custom_model_action/(?P<object_pk>\d+)/$',
        core_views.custom_model_action, name='custom-model-action')
]

views.py

from django.urls import reverse
from django.contrib import messages
from django.http import HttpResponse, HttpResponseRedirect

def custom_model_action(request, object_pk):
    messages.info(request, 'Performed custom action!')
    return HttpResponseRedirect(
       reverse('admin:<yourapp>_<yourmodel>_change', args=[object_pk])
    )

Answer 2

If you realy need per-single object, I suggest you to use this solution, eg:

class Gallery(TimeStampedModel):
    title = models.CharField(max_length=200)
    attachment = models.FileField(upload_to='gallery/attachment/%Y/%m/%d')

    def __str__(self):
        return self.title

    def process_button(self):
        return ('<button id="%(id)s class="btn btn-default process_btn" '
                'data-value="%(value)s>Process</button>' % {'id': self.pk, 'value': self.attachment.url})
    process_button.short_description = 'Action'
    process_button.allow_tags = True

In your admin.py, insert process_button into list_display;

class GalleryAdmin(admin.ModelAdmin):
    list_display = ['title', 'process_button', 'created']
    search_fields = ['title', 'pk']
    ....

    class Media:
        js = ('path/to/yourfile.js', )

Then, inside yourfile.js, you can also process it..

$('.process_btn').click(function(){
    var id = $(this).attr('id');       // single object id
    var value = $(this).data('value'); // single object value
    ...
});

Hope it helpful..