Merge branch '47196-actionview-missingtemplate-missing-template-projects-merge_requests-invalid-projects-merge_requests-application-invalid-pr' into 'master'

Resolve "ActionView::MissingTemplate: Missing template projects/merge_requests/invalid, projects/merge_requests/application/invalid, pr..."

Closes #47196

See merge request gitlab-org/gitlab-ce!19356

1 files changed, 11 insertions, 22 deletions

diff --git a/app/controllers/projects/merge_requests_controller.rb b/app/controllers/projects/merge_requests_controller.rb
index ecea6e1b2bf..b452bfd7e6f 100644
--- a/app/controllers/projects/merge_requests_controller.rb
+++ b/app/controllers/projects/merge_requests_controller.rb
@@ -28,15 +28,14 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
   end
 
   def show
-    validates_merge_request
-    close_merge_request_without_source_project
-    check_if_can_be_merged
-
-    # Return if the response has already been rendered
-    return if response_body
+    close_merge_request_if_no_source_project
+    mark_merge_request_mergeable
 
     respond_to do |format|
       format.html do
+        # use next to appease Rubocop
+        next render('invalid') if target_branch_missing?
+
         # Build a note object for comment form
         @note = @project.notes.new(noteable: @merge_request)
 
@@ -234,20 +233,6 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
   alias_method :issuable, :merge_request
   alias_method :awardable, :merge_request
 
-  def validates_merge_request
-    # Show git not found page
-    # if there is no saved commits between source & target branch
-    if @merge_request.has_no_commits?
-      # and if target branch doesn't exist
-      return invalid_mr unless @merge_request.target_branch_exists?
-    end
-  end
-
-  def invalid_mr
-    # Render special view for MR with removed target branch
-    render 'invalid'
-  end
-
   def merge_params
     params.permit(merge_params_attributes)
   end
@@ -261,7 +246,7 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
       @merge_request.head_pipeline && @merge_request.head_pipeline.active?
   end
 
-  def close_merge_request_without_source_project
+  def close_merge_request_if_no_source_project
     if !@merge_request.source_project && @merge_request.open?
       @merge_request.close
     end
@@ -269,7 +254,11 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
 
   private
 
-  def check_if_can_be_merged
+  def target_branch_missing?
+    @merge_request.has_no_commits? && !@merge_request.target_branch_exists?
+  end
+
+  def mark_merge_request_mergeable
     @merge_request.check_if_can_be_merged
   end