Init controller & JSON route for unseen popups

app/controllers/news_popups_controller.rb

@@ -0,0 +1,17 @@
+class NewsPopupsController < ApplicationController
+  def index
+    respond_to do |format|
+      format.json { render json: unseen_news_popups }
+    end
+  end
+
+  private
+
+    def unseen_news_popups
+      HasSeenNewsPopup
+        .where(user: current_user)
+        .left_outer_joins(:news_popup)
+        .select('news_popups.active', 'news_popups.name')
+        .where(news_popups: { active: true })
+    end
+end

app/models/has_seen_news_popup.rb

@@ -1,4 +1,4 @@
 class HasSeenNewsPopup < ApplicationRecord
-  belongs_to :user_id
-  belongs_to :news_popup_id
+  belongs_to :user
+  belongs_to :news_popup
 end

config/routes.rb

@@ -844,6 +844,8 @@
       to: 'erdbeere#fill_realizations_select',
       as: 'fill_realizations_select'
 
+  # News popups routes
+  resources :news_popups, only: [:index]
 
   # main routes