How to leave the required params in the url?

Question

Ruby on Rails

There is a form

<%= form_tag static_pages_mytasks_path({category_id: params[:category_id]}), :method => 'get' do |f| %>
      <%= select_tag(:status, options_for_select([['опубликовано', 1], ['черновик', 2], ['удалено', 3]],{ selected: params[:status]}), prompt: "Изменить статус", class: "form-control", onchange: "this.form.submit();") %>
    </div>
    <div class="all_post_city_select">
      <%= select_tag(:city_id, options_for_select([['Москва', 1], ['Питер', 2], ['Казань', 3]], {selected: params[:city_id]}),prompt: "Выбрать город",class: "form-control", :onchange => "this.form.submit();") %>
      <% end %>

and there are links

<% Category.where(parent_id: 0).each do |category| %>
    <li class="list-group-item">
      <%= link_to category.name, static_pages_mytasks_path(category_id:category.id, status: params[:status], city_id: params[:city_id]) %>
      <% end %>

If you first select a city or status and then click on the links, then everything is fine, but if you first click on the links and then select the city and status, then the categories fly off, tell me how to leave params[:category_id] in the form?

Answer 1

Add input type="hidden" to the form with the category value:

<%= hidden_field_tag :category_id, params[:category_id] %>