Correctly adds commit ID into dropdown

Removes un-used method
Fixes other Ruby issues

app/assets/javascripts/project.js.coffee

@@ -61,6 +61,8 @@ class @Project
         data: (term, callback) ->
           $.ajax(
             url: $dropdown.data('refs-url')
+            data:
+              ref: $dropdown.data('ref')
           ).done (refs) ->
             callback(refs)
         selectable: true

app/controllers/projects_controller.rb

@@ -252,20 +252,18 @@ class ProjectsController < Projects::ApplicationController
   end
   def refs
-    repository = @project.repository
-    tags = VersionSorter.rsort(repository.tag_names)
-
     options = {
-      'Branches' => repository.branch_names,
+      'Branches' => @repository.branch_names,
     }
-    if tags.any?
-      options['Tags'] = tags
+    unless @repository.tag_count.zero?
+      options['Tags'] = VersionSorter.rsort(@repository.tag_names)
     end
     # If reference is commit id - we should add it to branch/tag selectbox
-    if @ref && !options.flatten.include?(@ref) && @ref =~ /\A[0-9a-zA-Z]{6,52}\z/
-      options['Commits'] = @ref
+    ref = params[:ref]
+    if ref && !options.flatten.include?(ref) && ref =~ /\A[0-9a-zA-Z]{6,52}\z/
+      options['Commits'] = [ref]
     end
     render json: options.to_json

app/helpers/application_helper.rb

@@ -101,22 +101,6 @@ module ApplicationHelper
     'Never'
   end
-  def grouped_options_refs
-    repository = @project.repository
-
-    options = [
-      ['Branches', repository.branch_names],
-      ['Tags', VersionSorter.rsort(repository.tag_names)]
-    ]
-
-    # If reference is commit id - we should add it to branch/tag selectbox
-    if @ref && !options.flatten.include?(@ref) && @ref =~ /\A[0-9a-zA-Z]{6,52}\z/
-      options << ['Commit', [@ref]]
-    end
-
-    grouped_options_for_select(options, @ref || @project.default_branch)
-  end
-
   # Define whenever show last push event
   # with suggestion to create MR
   def show_last_push_widget?(event)

app/views/shared/_ref_switcher.html.haml

+- dropdown_toggle_text = @ref || @project.default_branch
 = form_tag switch_namespace_project_refs_path(@project.namespace, @project), method: :get, class: "project-refs-form" do
   = hidden_field_tag :destination, destination
   - if defined?(path)
@@ -5,7 +6,7 @@
   - @options && @options.each do |key, value|
     = hidden_field_tag key, value, id: nil
   .dropdown
-    = dropdown_toggle @ref || @project.default_branch, { toggle: "dropdown", selected: @ref || @project.default_branch, refs_url: refs_namespace_project_path(@project.namespace, @project) }, { toggle_class: "js-project-refs-dropdown" }
+    = dropdown_toggle dropdown_toggle_text, { toggle: "dropdown", selected: @ref || @project.default_branch, ref: @ref, refs_url: refs_namespace_project_path(@project.namespace, @project) }, { toggle_class: "js-project-refs-dropdown" }
     .dropdown-menu.dropdown-menu-selectable{ class: ("dropdown-menu-align-right" if local_assigns[:align_right]) }
       = dropdown_title "Switch branch/tag"
       = dropdown_filter "Search branches and tags"

spec/helpers/application_helper_spec.rb

@@ -174,51 +174,6 @@ describe ApplicationHelper do
     end
   end
-  describe 'grouped_options_refs' do
-    let(:options) { helper.grouped_options_refs }
-    let(:project) { create(:project) }
-
-    before do
-      assign(:project, project)
-
-      # Override Rails' grouped_options_for_select helper to just return the
-      # first argument (`options`), since it's easier to work with than the
-      # generated HTML.
-      allow(helper).to receive(:grouped_options_for_select).
-        and_wrap_original { |_, *args| args.first }
-    end
-
-    it 'includes a list of branch names' do
-      expect(options[0][0]).to eq('Branches')
-      expect(options[0][1]).to include('master', 'feature')
-    end
-
-    it 'includes a list of tag names' do
-      expect(options[1][0]).to eq('Tags')
-      expect(options[1][1]).to include('v1.0.0', 'v1.1.0')
-    end
-
-    it 'includes a specific commit ref if defined' do
-      # Must be an instance variable
-      ref = '2ed06dc41dbb5936af845b87d79e05bbf24c73b8'
-      assign(:ref, ref)
-
-      expect(options[2][0]).to eq('Commit')
-      expect(options[2][1]).to eq([ref])
-    end
-
-    it 'sorts tags in a natural order' do
-      # Stub repository.tag_names to make sure we get some valid testing data
-      expect(project.repository).to receive(:tag_names).
-        and_return(['v1.0.9', 'v1.0.10', 'v2.0', 'v3.1.4.2', 'v2.0rc1¿',
-                    'v1.0.9a', 'v2.0-rc1', 'v2.0rc2'])
-
-      expect(options[1][1]).
-        to eq(['v3.1.4.2', 'v2.0', 'v2.0rc2', 'v2.0rc1¿', 'v2.0-rc1', 'v1.0.10',
-               'v1.0.9', 'v1.0.9a'])
-    end
-  end
-
   describe 'simple_sanitize' do
     let(:a_tag) { '<a href="#">Foo</a>' }