Update params

app/controllers/delete_logs_controller.rb

@@ -27,7 +27,7 @@ class DeleteLogsController < ApplicationController
     logs = LettingsLog.find(params.require(:ids))
     discard logs
     if request.referer&.include?("delete-duplicates")
-      redirect_to lettings_log_duplicate_logs_path(lettings_log_id: remaining_log_id, original_log_id:), notice: I18n.t("notification.duplicate_logs_deleted", count: logs.count, log_ids: duplicate_log_ids(logs))
+      redirect_to lettings_log_duplicate_logs_path(lettings_log_id: params["remaining_log_id"], original_log_id: params["original_log_id"]), notice: I18n.t("notification.duplicate_logs_deleted", count: logs.count, log_ids: duplicate_log_ids(logs))
     else
       redirect_to lettings_logs_path, notice: I18n.t("notification.logs_deleted", count: logs.count)
     end
@@ -56,7 +56,7 @@ class DeleteLogsController < ApplicationController
     logs = SalesLog.find(params.require(:ids))
     discard logs
     if request.referer&.include?("delete-duplicates")
-      redirect_to sales_log_duplicate_logs_path(sales_log_id: remaining_log_id, original_log_id:), notice: I18n.t("notification.duplicate_logs_deleted", count: logs.count, log_ids: duplicate_log_ids(logs))
+      redirect_to sales_log_duplicate_logs_path(sales_log_id: params["remaining_log_id"], original_log_id: params["original_log_id"]), notice: I18n.t("notification.duplicate_logs_deleted", count: logs.count, log_ids: duplicate_log_ids(logs))
     else
       redirect_to sales_logs_path, notice: I18n.t("notification.logs_deleted", count: logs.count)
     end
@@ -203,12 +203,4 @@ private
   def duplicate_log_ids(logs)
     logs.map { |log| "Log #{log.id}" }.join(", ")
   end
-
-  def original_log_id
-    CGI.parse(URI.parse(request.referer).query)["original_log_id"][0]
-  end
-
-  def remaining_log_id
-    request.referer.split("/")[-2]
-  end
 end

app/views/logs/delete_duplicates.html.erb

@@ -28,7 +28,7 @@
       <%= govuk_button_to @duplicate_logs.count == 1 ? "Delete this log" : "Delete these logs",
         send("delete_logs_#{@log.class.name.underscore}s_path"),
         method: "delete",
-        params: { ids: @duplicate_logs.map(&:id), original_log_id: @original_log_id } %>
+        params: { ids: @duplicate_logs.map(&:id), original_log_id: @original_log_id, remaining_log_id: @log.id } %>
       <%= govuk_button_link_to(
         "Cancel",
         send("#{@log.class.name.underscore}_duplicate_logs_path", @log),