Filters for CBV ListView using GET from Previous and Current Page-CodePudding

I am trying to add search functionality to a ListView in two places in my Django application. From the homepage, I want users to be able to filter by zip code, and on the ListView template, I also want users to have the ability to filter by another attribute in the model. My issue is that the self.request.GET.get('q') returns None when filtering from the ListView page, and I want it to retain the zip code filter that I used in the previous page.

For search functionality, I am using Q.

How can I retain the zip code filter from the initial request so that I can query on both zip code and category?

views.py

class ListingsView(ListView):
    
    model = Listing
    template_name = 'listings/list.html'
    context_object_name = 'listing_list'
    
    def get_queryset(self):
        query_zip = self.request.GET.get('q_zip_code')
        query_category = self.request.GET.get('q_category')
        if query_category == None:
            queryset = Listing.objects.filter(Q(zip_code__icontains = query_zip))
        else:
            queryset = Listing.objects.filter(Q(zip_code__icontains = query_zip) & Q(category__icontains = query_category))
        return queryset

home.html

<p>
     <form  action="{% url 'rental_listings_list' %}" method="get">
          <input name="q_zip_code"  type="text" placeholder="Zip Code" aria-label="Zip Code">
          <button  type="submit">SEARCH</button>
     </form>
</p>

list.html

<form  action="{% url 'rental_listings_list' %}" method="get">
     <input name="q_category"  type="text" placeholder="Category" aria-label="Category">
     <button  type="submit">UPDATE</button>
</form>

CodePudding user response：

Add in your list.html:

action="{% url 'rental_listings_list' %}?q_category={{ request.GET.q_category }}"

CodePudding user response：

Finally figured it out with help from Maxim!

Add to list.html

<input name="q_zip_code" type="hidden" value="{{ request.GET.q_zip_code }}">

Add to view.py

    def get_queryset(self):
        query_zip = self.request.GET.get('q_zip_code')
        query_category = self.request.GET.get('q_category')
        if query_category == None:
            queryset = RentalListing.objects.filter(Q(zip_code__icontains = query_zip))
        else:
            query_zip = self.request.GET.get('q_zip_code', '')
            queryset = RentalListing.objects.filter(Q(zip_code__icontains = query_zip) & Q(category__icontains = query_category))
        return queryset