Merge branch '23341-fix-viewing-mr-from-deleted-project' into 'master'

CHANGELOG.md

@@ -39,6 +39,7 @@ Please view this file on the master branch, on stable branches it's out of date.
   - ProjectCacheWorker updates caches at most once per 15 minutes per project
   - Fix Error 500 when viewing old merge requests with bad diff data
   - Create a new /templates namespace for the /licenses, /gitignores and /gitlab_ci_ymls API endpoints. !5717 (tbalthazar)
+  - Fix viewing merged MRs when the source project has been removed !6991
   - Speed-up group milestones show page
   - Fix inconsistent options dropdown caret on mobile viewports (ClemMakesApps)
   - Extract project#update_merge_requests and SystemHooks to its own worker from GitPushService

app/controllers/projects/merge_requests_controller.rb

@@ -398,7 +398,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
 
       status ||= "preparing"
     else
-      ci_service = @merge_request.source_project.ci_service
+      ci_service = @merge_request.source_project.try(:ci_service)
       status = ci_service.commit_status(merge_request.diff_head_sha, merge_request.source_branch) if ci_service
 
       if ci_service.respond_to?(:commit_coverage)
@@ -554,7 +554,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
   def define_pipelines_vars
     @pipelines = @merge_request.all_pipelines
 
-    if @pipelines.any?
+    if @pipelines.present?
       @pipeline = @pipelines.first
       @statuses = @pipeline.statuses.relevant
     end

app/helpers/merge_requests_helper.rb

@@ -86,11 +86,15 @@ module MergeRequestsHelper
   end
 
   def source_branch_with_namespace(merge_request)
-    branch = link_to(merge_request.source_branch, namespace_project_commits_path(merge_request.source_project.namespace, merge_request.source_project, merge_request.source_branch))
+    namespace = merge_request.source_project_namespace
+    branch = merge_request.source_branch
+
+    if merge_request.source_branch_exists?
+      namespace = link_to(namespace, project_path(merge_request.source_project))
+      branch = link_to(branch, namespace_project_commits_path(merge_request.source_project.namespace, merge_request.source_project, merge_request.source_branch))
+    end
 
     if merge_request.for_fork?
-      namespace = link_to(merge_request.source_project_namespace,
-        project_path(merge_request.source_project))
       namespace + ":" + branch
     else
       branch

app/models/merge_request.rb

@@ -326,21 +326,17 @@ class MergeRequest < ActiveRecord::Base
   def validate_fork
     return true unless target_project && source_project
     return true if target_project == source_project
-    return true unless forked_source_project_missing?
+    return true unless source_project_missing?
 
     errors.add :validate_fork,
                'Source project is not a fork of the target project'
   end
 
   def closed_without_fork?
-    closed? && forked_source_project_missing?
+    closed? && source_project_missing?
   end
 
-  def closed_without_source_project?
-    closed? && !source_project
-  end
-
-  def forked_source_project_missing?
+  def source_project_missing?
     return false unless for_fork?
     return true unless source_project
 
@@ -348,9 +344,7 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def reopenable?
-    return false if closed_without_fork? || closed_without_source_project? || merged?
-
-    closed?
+    closed? && !source_project_missing? && source_branch_exists?
   end
 
   def ensure_merge_request_diff
@@ -662,7 +656,7 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def has_ci?
-    source_project.ci_service && commits.any?
+    source_project.try(:ci_service) && commits.any?
   end
 
   def branch_missing?
@@ -694,12 +688,9 @@ class MergeRequest < ActiveRecord::Base
 
     @environments ||=
       begin
-        environments = source_project.environments_for(
-          source_branch, diff_head_commit)
-        environments += target_project.environments_for(
-          target_branch, diff_head_commit, with_tags: true)
-
-        environments.uniq
+        envs = target_project.environments_for(target_branch, diff_head_commit, with_tags: true)
+        envs.concat(source_project.environments_for(source_branch, diff_head_commit)) if source_project
+        envs.uniq
       end
   end
 

app/views/projects/merge_requests/_show.html.haml

@@ -26,19 +26,19 @@
             %ul.dropdown-menu.dropdown-menu-align-right
               %li= link_to "Email Patches", merge_request_path(@merge_request, format: :patch)
               %li= link_to "Plain Diff",    merge_request_path(@merge_request, format: :diff)
-      - unless @merge_request.closed_without_fork?
-        .normal
-          %span Request to merge
-          %span.label-branch= source_branch_with_namespace(@merge_request)
-          %span into
-          %span.label-branch
-            = link_to @merge_request.target_branch, namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch)
-          - if @merge_request.open? && @merge_request.diverged_from_target_branch?
-            %span (#{pluralize(@merge_request.diverged_commits_count, 'commit')} behind)
+      .normal
+        %span Request to merge
+        %span.label-branch= source_branch_with_namespace(@merge_request)
+        %span into
+        %span.label-branch
+          = link_to @merge_request.target_branch, namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch)
+        - if @merge_request.open? && @merge_request.diverged_from_target_branch?
+          %span (#{pluralize(@merge_request.diverged_commits_count, 'commit')} behind)
 
-    - unless @merge_request.closed_without_source_project?
+    - if @merge_request.source_branch_exists?
       = render "projects/merge_requests/show/how_to_merge"
-      = render "projects/merge_requests/widget/show.html.haml"
+
+    = render "projects/merge_requests/widget/show.html.haml"
 
     - if @merge_request.source_branch_exists? && @merge_request.mergeable? && @merge_request.can_be_merged_by?(current_user)
       .light.prepend-top-default.append-bottom-default
@@ -52,7 +52,7 @@
           = link_to namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: { target: 'div#notes', action: 'notes', toggle: 'tab' } do
             Discussion
             %span.badge= @merge_request.mr_and_commit_notes.user.count
-        - unless @merge_request.closed_without_source_project?
+        - if @merge_request.source_project
           %li.commits-tab
             = link_to commits_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), data: { target: 'div#commits', action: 'commits', toggle: 'tab' } do
               Commits

spec/features/merge_requests/created_from_fork_spec.rb

@@ -25,6 +25,20 @@ feature 'Merge request created from fork' do
     expect(page).to have_content 'Test merge request'
   end
 
+  context 'source project is deleted' do
+    background do
+      MergeRequests::MergeService.new(project, user).execute(merge_request)
+      fork_project.destroy!
+    end
+
+    scenario 'user can access merge request' do
+      visit_merge_request(merge_request)
+
+      expect(page).to have_content 'Test merge request'
+      expect(page).to have_content "(removed):#{merge_request.source_branch}"
+    end
+  end
+
   context 'pipeline present in source project' do
     include WaitForAjax
 

spec/models/merge_request_spec.rb

@@ -1198,7 +1198,7 @@ describe MergeRequest, models: true do
     end
   end
 
-  describe "#forked_source_project_missing?" do
+  describe "#source_project_missing?" do
     let(:project)      { create(:project) }
     let(:fork_project) { create(:project, forked_from_project: project) }
     let(:user)         { create(:user) }
@@ -1211,13 +1211,13 @@ describe MergeRequest, models: true do
           target_project: project)
       end
 
-      it { expect(merge_request.forked_source_project_missing?).to be_falsey }
+      it { expect(merge_request.source_project_missing?).to be_falsey }
     end
 
     context "when the source project is the same as the target project" do
       let(:merge_request) { create(:merge_request, source_project: project) }
 
-      it { expect(merge_request.forked_source_project_missing?).to be_falsey }
+      it { expect(merge_request.source_project_missing?).to be_falsey }
     end
 
     context "when the fork does not exist" do
@@ -1231,7 +1231,7 @@ describe MergeRequest, models: true do
         unlink_project.execute
         merge_request.reload
 
-        expect(merge_request.forked_source_project_missing?).to be_truthy
+        expect(merge_request.source_project_missing?).to be_truthy
       end
     end
   end
@@ -1274,38 +1274,6 @@ describe MergeRequest, models: true do
     end
   end
 
-  describe '#closed_without_source_project?' do
-    let(:project)      { create(:project) }
-    let(:user)         { create(:user) }
-    let(:fork_project) { create(:project, forked_from_project: project, namespace: user.namespace) }
-    let(:destroy_service) { Projects::DestroyService.new(fork_project, user) }
-
-    context 'when the merge request is closed' do
-      let(:closed_merge_request) do
-        create(:closed_merge_request,
-          source_project: fork_project,
-          target_project: project)
-      end
-
-      it 'returns false if the source project exists' do
-        expect(closed_merge_request.closed_without_source_project?).to be_falsey
-      end
-
-      it 'returns true if the source project does not exist' do
-        destroy_service.execute
-        closed_merge_request.reload
-
-        expect(closed_merge_request.closed_without_source_project?).to be_truthy
-      end
-    end
-
-    context 'when the merge request is open' do
-      it 'returns false' do
-        expect(subject.closed_without_source_project?).to be_falsey
-      end
-    end
-  end
-
   describe '#reopenable?' do
     context 'when the merge request is closed' do
       it 'returns true' do