Hide related content on selected proposals

app/views/proposals/show.html.erb

@@ -40,7 +40,10 @@
 
         <%= render "proposals/info", proposal: @proposal %>
         <%= render "shared/geozone", geozonable: @proposal %>
-        <%= render "relationable/related_content", relationable: @proposal %>
+
+        <% unless @proposal.selected? %>
+          <%= render "relationable/related_content", relationable: @proposal %>
+        <% end %>
 
         <div class="js-moderator-proposal-actions margin">
           <%= render "proposals/actions", proposal: @proposal %>

spec/features/proposals_spec.rb

@@ -211,6 +211,15 @@ describe "Proposals" do
       expect(page).not_to have_content proposal.code
       expect(page).not_to have_content("Proposal code:")
     end
+
+    scenario "Selected proposals does not show related content section" do
+      proposal = create(:proposal, :selected)
+      login_as(create(:user))
+
+      visit proposal_path(proposal)
+      expect(page).not_to have_content("Related content")
+      expect(page).not_to have_button("Add related content")
+    end
   end
 
   context "Show on mobile screens" do