Use the new check_project_feature_available! method in project controllers

app/controllers/projects/application_controller.rb

@@ -54,7 +54,12 @@ class Projects::ApplicationController < ApplicationController
   end
 
   def check_project_feature_available!(feature)
-    return render_404 unless project.feature_available?(feature, current_user)
+    render_404 unless project.feature_available?(feature, current_user)
+  end
+
+  def check_issuables_available!
+    render_404 unless project.feature_available?(:issues, current_user) ||
+        project.feature_available?(:merge_requests, current_user)
   end
 
   def method_missing(method_sym, *arguments, &block)

app/controllers/projects/discussions_controller.rb

 class Projects::DiscussionsController < Projects::ApplicationController
-  before_action :module_enabled
+  before_action :check_merge_requests_available!
   before_action :merge_request
   before_action :discussion
   before_action :authorize_resolve_discussion!
@@ -34,8 +34,4 @@ class Projects::DiscussionsController < Projects::ApplicationController
   def authorize_resolve_discussion!
     access_denied! unless discussion.can_resolve?(current_user)
   end
-
-  def module_enabled
-    render_404 unless @project.feature_available?(:merge_requests, current_user)
-  end
 end

app/controllers/projects/issues_controller.rb

@@ -9,7 +9,7 @@ class Projects::IssuesController < Projects::ApplicationController
   prepend_before_action :authenticate_user!, only: [:new]
 
   before_action :redirect_to_external_issue_tracker, only: [:index, :new]
-  before_action :module_enabled
+  before_action :check_issues_available!
   before_action :issue, except: [:index, :new, :create, :bulk_update]
 
   # Allow write(create) issue
@@ -250,7 +250,7 @@ class Projects::IssuesController < Projects::ApplicationController
     return render_404 unless can?(current_user, :push_code, @project) && @issue.can_be_worked_on?(current_user)
   end
 
-  def module_enabled
+  def check_issues_available!
     return render_404 unless @project.feature_available?(:issues, current_user) && @project.default_issues_tracker?
   end
 

app/controllers/projects/labels_controller.rb

 class Projects::LabelsController < Projects::ApplicationController
   include ToggleSubscriptionAction
 
-  before_action :module_enabled
+  before_action :check_issuables_available!
   before_action :label, only: [:edit, :update, :destroy, :promote]
   before_action :find_labels, only: [:index, :set_priorities, :remove_priority, :toggle_subscription]
   before_action :authorize_read_label!
@@ -135,12 +135,6 @@ class Projects::LabelsController < Projects::ApplicationController
 
   protected
 
-  def module_enabled
-    unless @project.feature_available?(:issues, current_user) || @project.feature_available?(:merge_requests, current_user)
-      return render_404
-    end
-  end
-
   def label_params
     params.require(:label).permit(:title, :description, :color)
   end

app/controllers/projects/merge_requests_controller.rb

@@ -7,7 +7,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
   include ToggleAwardEmoji
   include IssuableCollections
 
-  before_action :module_enabled
+  before_action :check_merge_requests_available!
   before_action :merge_request, only: [
     :edit, :update, :show, :diffs, :commits, :conflicts, :conflict_for_path, :pipelines, :merge,
     :pipeline_status, :ci_environments_status, :toggle_subscription, :cancel_merge_when_pipeline_succeeds, :remove_wip, :resolve_conflicts, :assign_related_issues, :commit_change_content
@@ -461,10 +461,6 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     return render_404 unless @conflicts_list.can_be_resolved_by?(current_user)
   end
 
-  def module_enabled
-    return render_404 unless @project.feature_available?(:merge_requests, current_user)
-  end
-
   def validates_merge_request
     # Show git not found page
     # if there is no saved commits between source & target branch

app/controllers/projects/milestones_controller.rb

 class Projects::MilestonesController < Projects::ApplicationController
   include MilestoneActions
 
-  before_action :module_enabled
+  before_action :check_issuables_available!
   before_action :milestone, only: [:edit, :update, :destroy, :show, :merge_requests, :participants, :labels]
 
   # Allow read any milestone
@@ -95,12 +95,6 @@ class Projects::MilestonesController < Projects::ApplicationController
     return render_404 unless can?(current_user, :admin_milestone, @project)
   end
 
-  def module_enabled
-    unless @project.feature_available?(:issues, current_user) || @project.feature_available?(:merge_requests, current_user)
-      return render_404
-    end
-  end
-
   def milestone_params
     params.require(:milestone).permit(:title, :description, :start_date, :due_date, :state_event)
   end

app/controllers/projects/snippets_controller.rb

@@ -5,7 +5,7 @@ class Projects::SnippetsController < Projects::ApplicationController
   include SnippetsActions
   include RendersBlob
 
-  before_action :module_enabled
+  before_action :check_snippets_available!
   before_action :snippet, only: [:show, :edit, :destroy, :update, :raw, :toggle_award_emoji, :mark_as_spam]
 
   # Allow read any snippet
@@ -102,10 +102,6 @@ class Projects::SnippetsController < Projects::ApplicationController
     return render_404 unless can?(current_user, :admin_project_snippet, @snippet)
   end
 
-  def module_enabled
-    return render_404 unless @project.feature_available?(:snippets, current_user)
-  end
-
   def snippet_params
     params.require(:project_snippet).permit(:title, :content, :file_name, :private, :visibility_level, :description)
   end