Fix and add applications controller

app/controllers/projects/clusters/applications_controller.rb

@@ -4,18 +4,14 @@ class Projects::Clusters::ApplicationsController < Projects::ApplicationControll
   before_action :authorize_read_cluster!
   before_action :authorize_create_cluster!, only: [:create]
-  def new
-  end
-
   def create
     return render_404 if application
-    new_application = application_class.create(cluster: cluster)
-
     respond_to do |format|
       format.json do
-        if new_application.persisted?
-          head :ok
+        # TODO: Do that via Service
+        if application_class.create(cluster: cluster).persisted?
+          head :no_data
         else
           head :bad_request
         end
@@ -26,11 +22,11 @@ class Projects::Clusters::ApplicationsController < Projects::ApplicationControll
   private
   def cluster
-    @cluster ||= project.clusters.find_by(cluster_id: params[:cluster_id]).present(current_user: current_user)
+    @cluster ||= project.clusters.find(params[:id]) || render_404
   end
   def application_class
-    Clusters::Cluster::Applications.find(params[:application])
+    Clusters::Cluster::APPLICATIONS[params[:application]] || render_404
   end
   def application

app/models/clusters/applications/helm.rb

@@ -7,7 +7,7 @@ module Clusters
       include ::Clusters::Concerns::AppStatus
-      belongs_to :cluser, class_name: 'Clusters::Cluster', foreign_key: :cluster_id
+      belongs_to :cluster, class_name: 'Clusters::Cluster', foreign_key: :cluster_id
       default_value_for :version, Gitlab::Clusters::Helm::HELM_VERSION

app/workers/concerns/cluster_app.rb

@@ -3,7 +3,7 @@ module ClusterApp
   included do
     def find_app(app_name, id)
-      Clusters::Applications.const_get(app_name.classify).find(id).try do |app|
+      Clusters::Cluster::APPLICATIONS[app_name].find(id).try do |app|
         yield(app) if block_given?
       end
     end

config/routes/project.rb

@@ -191,8 +191,8 @@ constraints(ProjectUrlConstrainer.new) do
         member do
           get :status, format: :json
-          scope '*application' do
-            resource :applications, only: [:create]
+          scope :applications do
+            get '/*application', to: 'clusters/applications#create'
           end
         end
       end