Commit ce8ee22e authored by Douwe Maan's avatar Douwe Maan Committed by Rémy Coutable

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

Fix a 500 error viewing an MR with a deleted source project

## What does this MR do?

Allows merged MRs to be shown without any 500 errors if the source project is removed

## Are there points in the code the reviewer needs to double check?

https://gitlab.com/gitlab-org/gitlab-ce/commit/31c37c6c38258684fc92e0d91119c33872e39034 fixed this for closed MRs only. I had trouble understanding the introduced helper and logic, so reverted it and keyed everything on the existence of the source project or branch directly.

commits.json returns a 500 error for a closed or merged MR; the approach taken in the above MR was to hide the commits... tab, so I've run with that.

For merged MRs, the commits (but not the pipeline data) are in the target project, so we *could* do better, but it's a fairly nasty intervention to make it happen.

## Why was this MR needed?

Viewing merged MRs should work even if the fork they came from has been deleted or unlinked.

## Screenshots (if relevant)

![Screen_Shot_2016-10-19_at_17.56.37](/uploads/1aeadd5147b9a4ad29b946b1c7ea52cb/Screen_Shot_2016-10-19_at_17.56.37.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [ ] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Closes #23341

See merge request !6991
parent eb9d321e
......@@ -35,6 +35,7 @@ Please view this file on the master branch, on stable branches it's out of date.
- Add a /wip slash command to toggle the Work In Progress status of a merge request. !6259 (tbalthazar)
- 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
......
......@@ -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
......
......@@ -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
......
......@@ -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
......
......@@ -26,7 +26,6 @@
%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)
......@@ -36,8 +35,9 @@
- 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"
- if @merge_request.source_branch_exists? && @merge_request.mergeable? && @merge_request.can_be_merged_by?(current_user)
......@@ -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
......
......@@ -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
......
......@@ -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
......
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