Allow RfC index action for exercises to be nested

app/models/request_for_comment.rb

@@ -42,6 +42,10 @@ class RequestForComment < ApplicationRecord
     state(solved_before_last_save, full_score_reached_before_last_save)
   end
 
+  def self.parent_resource
+    Exercise
+  end
+
   private
 
   def state(solved, full_score_reached)

app/views/exercises/index.html.slim

@@ -49,7 +49,7 @@ h1 = Exercise.model_name.human(count: 2)
               ul.dropdown-menu.float-end role="menu"
                 li = link_to(t('shared.show'), exercise, 'data-turbolinks' => "false", class: 'dropdown-item') if policy(exercise).show?
                 li = link_to(t('activerecord.models.user_exercise_feedback.other'), feedback_exercise_path(exercise), class: 'dropdown-item') if policy(exercise).feedback?
-                li = link_to(t('activerecord.models.request_for_comment.other'), rfcs_for_exercise_path(exercise), class: 'dropdown-item') if policy(exercise).rfcs_for_exercise?
+                li = link_to(t('activerecord.models.request_for_comment.other'), exercise_request_for_comments_path(exercise), class: 'dropdown-item') if policy(exercise).rfcs_for_exercise?
                 li = link_to(t('activerecord.models.programming_group.other'), exercise_programming_groups_path(exercise), class: 'dropdown-item') if policy(exercise).programming_groups_for_exercise?
                 li = link_to(t('shared.destroy'), exercise, data: {confirm: t('shared.confirm_destroy')}, method: :delete, class: 'dropdown-item') if policy(exercise).destroy?
                 li = link_to(t('.clone'), clone_exercise_path(exercise), data: {confirm: t('shared.confirm_destroy')}, method: :post, class: 'dropdown-item') if policy(exercise).clone?

app/views/exercises/show.html.slim

@@ -18,7 +18,7 @@ h1.d-inline-block
     li = link_to(t('exercises.index.implement'), implement_exercise_path(@exercise), 'data-turbolinks' => "false", class: 'dropdown-item') if policy(@exercise).implement?
     li = link_to(t('shared.statistics'), statistics_exercise_path(@exercise), 'data-turbolinks' => "false", class: 'dropdown-item') if policy(@exercise).statistics?
     li = link_to(t('activerecord.models.user_exercise_feedback.other'), feedback_exercise_path(@exercise), class: 'dropdown-item') if policy(@exercise).feedback?
-    li = link_to(t('activerecord.models.request_for_comment.other'), rfcs_for_exercise_path(@exercise), class: 'dropdown-item') if policy(@exercise).rfcs_for_exercise?
+    li = link_to(t('activerecord.models.request_for_comment.other'), exercise_request_for_comments_path(@exercise), class: 'dropdown-item') if policy(@exercise).rfcs_for_exercise?
     li = link_to(t('activerecord.models.programming_group.other'), exercise_programming_groups_path(@exercise), class: 'dropdown-item') if policy(@exercise).programming_groups_for_exercise?
     li = link_to(t('shared.destroy'), @exercise, data: {confirm: t('shared.confirm_destroy')}, method: :delete, class: 'dropdown-item') if policy(@exercise).destroy?
     li = link_to(t('exercises.index.clone'), clone_exercise_path(@exercise), data: {confirm: t('shared.confirm_destroy')}, method: :post, class: 'dropdown-item') if policy(@exercise).clone?

app/views/request_for_comments/index.html.slim

@@ -3,6 +3,7 @@ h1 = RequestForComment.model_name.human(count: 2)
 = render(layout: 'shared/form_filters') do |f|
   .col-md-9.col
     .row.align-items-center
+      - if params[:exercise_id].nil?
         .col-auto
           = f.label(:exercise_title_cont, t('activerecord.attributes.request_for_comments.exercise'), class: 'visually-hidden form-label')
           = f.search_field(:exercise_title_cont, class: 'form-control', placeholder: t('activerecord.attributes.request_for_comments.exercise'))

config/routes.rb

@@ -27,7 +27,7 @@ Rails.application.routes.draw do
   resources :comments, defaults: {format: :json}
   get '/my_request_for_comments', as: 'my_request_for_comments', to: 'request_for_comments#my_comment_requests'
   get '/my_rfc_activity', as: 'my_rfc_activity', to: 'request_for_comments#rfcs_with_my_comments'
-  get '/exercises/:exercise_id/request_for_comments', as: 'rfcs_for_exercise', to: 'request_for_comments#rfcs_for_exercise'
+  get '/exercises/:exercise_id/request_for_comments', as: 'exercise_request_for_comments', to: 'request_for_comments#rfcs_for_exercise'
 
   delete '/comment_by_id', to: 'comments#destroy_by_id'
   put '/comments', to: 'comments#update', defaults: {format: :json}