Revert `stages` change

app/models/commit_status.rb

@@ -55,11 +55,16 @@ class CommitStatus < ActiveRecord::Base
 
   def self.stages
     # We group by stage name, but order stages by theirs' index
-    unscoped.where(id: all.ids).group('stage').order('max(stage_idx)', 'stage').pluck('stage')
+    unscoped.from(all, :sg).group('stage').order('max(stage_idx)', 'stage').pluck('sg.stage')
   end
 
-  def self.status_for_stage(stage)
-    where(stage: stage).status
+  def self.stages_status
+    # We execute subquery for each stage to calculate a stage status
+    statuses = unscoped.from(all, :sg).group('stage').pluck('sg.stage', all.where('stage=sg.stage').status_sql)
+    statuses.inject({}) do |h, k|
+      h[k.first] = k.last
+      h
+    end
   end
 
   def ignored?

app/views/projects/ci/commits/_commit.html.haml

@@ -31,9 +31,10 @@
             Cant find HEAD commit for this branch
 
 
+    - stages_status = commit.statuses.stages_status
     - stages.each do |stage|
       %td
-        - if status = commit.statuses.status_for_stage(stage)
+        - if status = stages_status[stage]
           - tooltip = "#{stage.titleize}: #{status}"
           %span.has-tooltip(title="#{tooltip}"){class: "ci-status-icon-#{status}"}
             = ci_icon_for_status(status)

spec/models/commit_status_spec.rb

@@ -185,5 +185,17 @@ describe CommitStatus, models: true do
         is_expected.to eq(%w(build test deploy))
       end
     end
+
+    context 'stages with statuses' do
+      subject { CommitStatus.where(commit: commit).stages_status }
+
+      it 'return list of stages with statuses' do
+        is_expected.to eq({
+          'build' => 'failed',
+          'test' => 'success',
+          'deploy' => 'running'
+        })
+      end
+    end
   end
 end