Support filtering by "Any" milestone or issue and fix "No Milestone" and "No Label" filters

Closes #2619

Closes https://github.com/gitlabhq/gitlabhq/issues/9631

CHANGELOG

@@ -2,6 +2,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 v 8.1.0 (unreleased)
   - Add support for creating directories from Files page (Stan Hu)
+  - Support filtering by "Any" milestone or issue and fix "No Milestone" and "No Label" filters (Stan Hu)
   - Fix bug where transferring a project would result in stale commit links (Stan Hu)
   - Include full path of source and target branch names in New Merge Request page (Stan Hu)
   - Add user preference to view activities as default dashboard (Stan Hu)

app/finders/issuable_finder.rb

@@ -72,11 +72,15 @@ class IssuableFinder
     params[:milestone_title].present?
   end
+  def no_milestones?
+    milestones? && params[:milestone_title] == Milestone::None.title
+  end
+
   def milestones
     return @milestones if defined?(@milestones)
     @milestones =
-      if milestones? && params[:milestone_title] != Milestone::None.title
+      if milestones?
         Milestone.where(title: params[:milestone_title])
       else
         nil
@@ -183,7 +187,11 @@ class IssuableFinder
   def by_milestone(items)
     if milestones?
-      items = items.where(milestone_id: milestones.try(:pluck, :id))
+      if no_milestones?
+        items = items.where(milestone_id: [-1, nil])
+      else
+        items = items.where(milestone_id: milestones.try(:pluck, :id))
+      end
     end
     items
@@ -207,13 +215,19 @@ class IssuableFinder
   def by_label(items)
     if params[:label_name].present?
-      label_names = params[:label_name].split(",")
-      item_ids = LabelLink.joins(:label).
-        where('labels.title in (?)', label_names).
-        where(target_type: klass.name).pluck(:target_id)
-      items = items.where(id: item_ids)
+      if params[:label_name] == Label::None.title
+        item_ids = LabelLink.where(target_type: klass.name).pluck(:target_id)
+        items = items.where('id NOT IN (?)', item_ids)
+      else
+        label_names = params[:label_name].split(",")
+
+        item_ids = LabelLink.joins(:label).
+          where('labels.title in (?)', label_names).
+          where(target_type: klass.name).pluck(:target_id)
+        items = items.where(id: item_ids)
+      end
     end
     items

app/helpers/labels_helper.rb

@@ -93,7 +93,9 @@ module LabelsHelper
   end
   def project_labels_options(project)
-    options_from_collection_for_select(project.labels, 'name', 'name', params[:label_name])
+    labels = project.labels.to_a
+    labels.unshift(Label::None)
+    options_from_collection_for_select(labels, 'name', 'name', params[:label_name])
   end
   # Required for Gitlab::Markdown::LabelReferenceFilter

app/models/label.rb

@@ -12,6 +12,9 @@
 class Label < ActiveRecord::Base
   include Referable
+  # Represents a "No Label" state used for filtering Issues and Merge
+  # Requests that have no label assigned.
+  None = Struct.new(:title, :name).new('No Label', 'No Label')
   DEFAULT_COLOR = '#428BCA'

app/views/shared/issuable/_filter.html.haml

@@ -39,13 +39,13 @@
         .filter-item.inline.milestone-filter
           = select_tag('milestone_title', projects_milestones_options,
-            class: 'select2 trigger-submit', include_blank: true,
+            class: 'select2 trigger-submit', include_blank: 'Any',
             data: {placeholder: 'Milestone'})
         - if @project
           .filter-item.inline.labels-filter
             = select_tag('label_name', project_labels_options(@project),
-              class: 'select2 trigger-submit', include_blank: true,
+              class: 'select2 trigger-submit', include_blank: 'Any',
               data: {placeholder: 'Label'})
         .pull-right

spec/finders/issues_finder_spec.rb

@@ -6,9 +6,11 @@ describe IssuesFinder do
   let(:project1) { create(:project) }
   let(:project2) { create(:project) }
   let(:milestone) { create(:milestone, project: project1) }
+  let(:label) { create(:label, project: project2) }
   let(:issue1) { create(:issue, author: user, assignee: user, project: project1, milestone: milestone) }
   let(:issue2) { create(:issue, author: user, assignee: user, project: project2) }
   let(:issue3) { create(:issue, author: user2, assignee: user2, project: project2) }
+  let!(:label_link) { create(:label_link, label: label, target: issue2) }
   before do
     project1.team << [user, :master]
@@ -48,6 +50,24 @@ describe IssuesFinder do
         expect(issues).to eq([issue1])
       end
+      it 'should filter by no milestone id' do
+        params = { scope: "all", milestone_title: Milestone::None.title, state: 'opened' }
+        issues = IssuesFinder.new(user, params).execute
+        expect(issues).to match_array([issue2, issue3])
+      end
+
+      it 'should filter by label name' do
+        params = { scope: "all", label_name: label.title, state: 'opened' }
+        issues = IssuesFinder.new(user, params).execute
+        expect(issues).to eq([issue2])
+      end
+
+      it 'should filter by no label name' do
+        params = { scope: "all", label_name: Label::None.title, state: 'opened' }
+        issues = IssuesFinder.new(user, params).execute
+        expect(issues).to match_array([issue1, issue3])
+      end
+
       it 'should be empty for unauthorized user' do
         params = { scope: "all", state: 'opened' }
         issues = IssuesFinder.new(nil, params).execute

spec/helpers/labels_helper_spec.rb

@@ -14,6 +14,11 @@ describe LabelsHelper do
         expect(label).not_to receive(:project)
         link_to_label(label)
       end
+
+      it 'includes option for "No Label"' do
+        result = project_labels_options(project)
+        expect(result).to include('No Label')
+      end
     end
     context 'without @project set' do