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Keeping filter states after edits (Django 1.4)

Author:
rhfung
Posted:
November 20, 2012
Language:
Python
Version:
1.4
Tags:
filter admin change_list
Score:
2 (after 2 ratings)

When saving an edit to an object from a filtered list view you are, by default, returned to list view without any of your filters applied.

This solves that problem, keeping the filtered view in a session variable until you reach a point where the session key is deleted.

This solution doesn't require changes to template code...this is completely self contained within your own admin.py files.

The solution presented here is a revision of a previous patch, which has been modified for Django 1.4. The Django 1.3 version exists at: http://djangosnippets.org/snippets/2531/

From chronosllc:

The advantage to our solution over the above linked solution is that under different use cases the user may or may not be redirected to the filtered list_view. For example, if you edit an object and click the save and continue button, then you would lose the filter when you finally finished editing the object and clicked save.

Added on here is a delete of the session key when users add objects, the reasoning we're going this route is we don't want to return users to filtered views when they just added a new object. Your mileage may vary and if so, it's easy enough to fit your own needs.

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class LocationAdmin(admin.ModelAdmin):
    def add_view(self, request, *args, **kwargs):
        result = super(LocationAdmin, self).add_view(request, *args, **kwargs )
        """
        Delete the session key, since we want the user to be directed to all listings
        after a save on a new object.
        """
        request.session['filtered'] =  None

        return result
    """
    Used to redirect users back to their filtered list of locations if there were any
    """
    def change_view(self, request, object_id, form_url='', extra_context=None):
        """
        save the referer of the page to return to the filtered
        change_list after saving the page
        """
        result = super(LocationAdmin, self).change_view(request, object_id, form_url, extra_context )

        # Look at the referer for a query string '^.*\?.*$'
        ref = request.META.get('HTTP_REFERER', '')
        if ref.find('?') != -1:
            # We've got a query string, set the session value
            request.session['filtered'] =  ref

        if request.POST.has_key('_save'):
            """
            We only kick into action if we've saved and if
            there is a session key of 'filtered', then we
            delete the key.
            """
            try:
                if request.session['filtered'] is not None:
                    result['Location'] = request.session['filtered']
                    request.session['filtered'] = None
            except:
                pass

        return result

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Comments

glarrain (on July 22, 2013):

Note that this feature was long requested (the ticket is 5 years old) bit it has finally been added to the trunk so we can expect it for Django 1.6. https://code.djangoproject.com/ticket/6903

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