Keep the current filter params after deleting a saved filter so you can change your mind

app/controllers/filters_controller.rb

@@ -7,12 +7,13 @@ class FiltersController < ApplicationController
   end
 
   def destroy
+    filter_params = @filter.as_params
     @filter.destroy!
 
     if request.referer == root_url
       redirect_to root_path
     else
-      redirect_to cards_path
+      redirect_to cards_path(filter_params)
     end
   end
 

test/controllers/filters_controller_test.rb

@@ -25,9 +25,12 @@ class FiltersControllerTest < ActionDispatch::IntegrationTest
   end
 
   test "destroy" do
+    filter = filters(:jz_assignments)
+    expected_params = filter.as_params
+
     assert_difference "users(:david).filters.count", -1 do
-      delete filter_path(filters(:jz_assignments))
+      delete filter_path(filter)
     end
-    assert_redirected_to cards_path
+    assert_redirected_to cards_path(expected_params)
   end
 end