Merge branch 'fix-edit-note-with-votes' into 'master'

Fix server error when editing a note to "+1" or "-1"

### Summary

If a user edits a comment with "+1" or "-1" in the beginning, the POST returns an Internal Server error. (issue #1151). This merge request resolves that error.

### Steps to reproduce

1. Comment on an issue with "Test comment".
2. Edit the issue.
3. Write "+1" and click "Save Comment".

### Expected behavior

The edited note should be saved and refreshed. Any previous upvotes/downvotes from the user should contain a strikethrough.

### Observed behavior

Internal Error

### Relevant logs

```
Started PUT "/avocode/avocode-manager/notes/4996" for 185.33.136.107 at 2015-02-28 17:11:53 +0100
Processing by Projects::NotesController#update as JS
Parameters: {"utf8"=>"✓", "authenticity_token"=>"*removed*", "note"=>{"note"=>"+1\r\n\r\nYes"}, "commit"=>"Save Comment", "project_id"=>"avocode/avocode-manager", "id"=>"4996"}
Completed 500 Internal Server Error in 86ms
ActionView::Template::Error (undefined method `each' for nil:NilClass):
28: %span.note-last-update
29: = note_timestamp(note)
30:
31: - if note.superceded?(@notes)
32: - if note.upvote?
33: %span.vote.upvote.label.label-gray.strikethrough
34: %i.fa.fa-thumbs-up
app/models/note.rb:495:in `superceded?'
app/views/projects/notes/_note.html.haml:31:in `_app_views_projects_notes__note_html_haml___812277000516355462_69988235638820'
app/controllers/projects/notes_controller.rb:71:in `note_to_html'
app/controllers/projects/notes_controller.rb:103:in `render_note_json'
app/controllers/projects/notes_controller.rb:39:in `block (2 levels) in update'
app/controllers/projects/notes_controller.rb:38:in `update'
```

### Fix

It turns out no tests were present for the "Edit Issue" functionality. I added spinach tests to exercise this and reproduced the error.

Most of the routes in `notes_controller.rb` appear to render all notes for the given discussion. `_form.html.haml` needs the full list of notes commented by the user to add strikethroughs for older upvotes/downvotes. However, only the `index` route appeared to obtain this information. The fix is to add a `before_filter` to obtain all the user's notes beforehand, except in the delete case where this information is not needed.

Things to watch: `NotesFinder` needs `target_type` and `target_id` to determine what to do. I'm not sure if there is a conscious effort to phase these keywords out in favor of `noteable_type` and `noteable_id`.

See merge request !360

CHANGELOG

@@ -2,6 +2,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 
 v 7.9.0 (unreleased)
   - Fix merge request URL passed to Webhooks. (Stan Hu)
+  - Fix bug that caused a server error when editing a comment to "+1" or "-1" (Stan Hu)
   - Move labels/milestones tabs to sidebar
   - Upgrade Rails gem to version 4.1.9.
   - Improve error messages for file edit failures

app/controllers/projects/notes_controller.rb

@@ -3,10 +3,10 @@ class Projects::NotesController < Projects::ApplicationController
   before_filter :authorize_read_note!
   before_filter :authorize_write_note!, only: [:create]
   before_filter :authorize_admin_note!, only: [:update, :destroy]
+  before_filter :find_current_user_notes, except: [:destroy, :delete_attachment]
 
   def index
     current_fetched_at = Time.now.to_i
-    @notes = NotesFinder.new.execute(project, current_user, params)
 
     notes_json = { notes: [], last_fetched_at: current_fetched_at }
 
@@ -116,4 +116,10 @@ class Projects::NotesController < Projects::ApplicationController
       :attachment, :line_code, :commit_id
     )
   end
+
+  private
+
+  def find_current_user_notes
+    @notes = NotesFinder.new.execute(project, current_user, params)
+  end
 end

app/helpers/notes_helper.rb

@@ -4,9 +4,9 @@ module NotesHelper
     (@noteable.class.name == note.noteable_type && !note.for_diff_line?)
   end
 
-  def note_target_fields
-    hidden_field_tag(:target_type, @target_type) +
-    hidden_field_tag(:target_id, @target_id)
+  def note_target_fields(note)
+    hidden_field_tag(:target_type, note.noteable.class.name.underscore) +
+    hidden_field_tag(:target_id, note.noteable.id)
   end
 
   def link_to_commit_diff_line_note(note)

app/views/projects/notes/_edit_form.html.haml

 .note-edit-form
   = form_for note, url: namespace_project_note_path(@project.namespace, @project, note), method: :put, remote: true, authenticity_token: true do |f|
+    = note_target_fields(note)
     = render layout: 'projects/md_preview', locals: { preview_class: "note-text" } do
       = render 'projects/zen', f: f, attr: :note,
         classes: 'note_text js-note-text'

app/views/projects/notes/_form.html.haml

 = form_for [@project.namespace.becomes(Namespace), @project, @note], remote: true, html: { :'data-type' => 'json', multipart: true, id: nil, class: "new_note js-new-note-form common-note-form gfm-form" }, authenticity_token: true do |f|
-  = note_target_fields
+  = note_target_fields(@note)
   = f.hidden_field :commit_id
   = f.hidden_field :line_code
   = f.hidden_field :noteable_id

features/project/commits/comments.feature

@@ -41,3 +41,9 @@ Feature: Project Commits Comments
     Given I leave a comment like "XML attached"
     And I delete a comment
     Then I should not see a comment saying "XML attached"
+
+  @javascript
+  Scenario: I can edit a comment with +1
+    Given I leave a comment like "XML attached"
+    And I edit the last comment with a +1
+    Then I should see +1 in the description

features/project/issues/issues.feature

@@ -139,6 +139,15 @@ Feature: Project Issues
     And I leave a comment with task markdown
     Then I should not see task checkboxes in the comment
 
+  @javascript
+  Scenario: Issue notes should be editable with +1
+    Given project "Shop" has "Tasks-open" open issue with task markdown
+    When I visit issue page "Tasks-open"
+    And I leave a comment with a header containing "Comment with a header"
+    Then The comment with the header should not have an ID
+    And I edit the last comment with a +1
+    Then I should see +1 in the description
+
   # Task status in issues list
 
   Scenario: Issues list should display task status

features/steps/shared/note.rb

@@ -135,4 +135,21 @@ module SharedNote
       'li.note div.timeline-content input[type="checkbox"]'
     )
   end
+
+  step 'I edit the last comment with a +1' do
+    find(".note").hover
+    find('.js-note-edit').click
+
+    within(".current-note-edit-form") do
+      fill_in 'note[note]', with: '+1 Awesome!'
+      click_button 'Save Comment'
+      sleep 0.05
+    end
+  end
+
+  step 'I should see +1 in the description' do
+    within(".note") do
+      page.should have_content("+1 Awesome!")
+    end
+  end
 end