Using breadcrumbs with django-filter, QueryDict trouble

Question

I'm using django-filter to drill down and would like to create breadcrumbs for each item that was filtered. For example:

Price ranges:
10,000+
5,000-9,999
1,000-4,999
0-999

Bedrooms:
4
3
2
1

Each of the items under Price ranges and Bedrooms would be a link to drill down in a queryset.

I'd like to create a breadcrumb such as Price range 0-999 or Bedrooms 3 if the user were to click those links, and then show Price range 0-999 > Bedrooms 3 or Bedrooms 3 > Price range 0-999 when they click a second link.

The breadcrumbs should maintain order (the part I'm having trouble with) and work for any number of attributes. Clicking a link in the breadcrumb trail should apply the filter clicked on and all filters before it in the trail.

I'd like to create an empty QueryDict and then iterate through request.GET to build the QueryDict up as I output the breadcrumbs, but for some reason QueryDict iterates through its elements backwards (see the documentation).

What's the cleanest way to accomplish this? Does anyone know why QueryDict works this way? (I imagine there's a use-case I'm missing.) Any advice is appreciated.

Answer 1

keep track of the order in sessions. so when the first filter is clicked (eg 3 beds) store it. then if another one is clicked, build your bread crumbs from sessions. say the second one was 0-999 you'd pull any existing breadcrumbs (in this example you'd find the 3 beds) and then tack on the latest (0-999).