Fix broken pipeline rendering [ci skip]

app/models/ci/pipeline.rb

@@ -21,8 +21,6 @@ module Ci
 
     after_create :keep_around_commits, unless: :importing?
 
-    delegate :stages, to: :statuses
-
     state_machine :status, initial: :created do
       event :enqueue do
         transition created: :pending
@@ -102,15 +100,19 @@ module Ci
       where.not(duration: nil).sum(:duration)
     end
 
-    def stages
+    def stages_query
       statuses.group('stage').select(:stage)
         .order('max(stage_idx)')
     end
 
+    def stages
+      self.stages_query.pluck(:stage)
+    end
+
     def stages_with_statuses
       status_sql = statuses.latest.where('stage=sg.stage').status_sql
 
-      stages_with_statuses = CommitStatus.from(self.stages, :sg).
+      stages_with_statuses = CommitStatus.from(self.stages_query, :sg).
         pluck('sg.stage', status_sql)
 
       stages_with_statuses.map do |stage|

app/views/projects/ci/pipelines/_pipeline.html.haml

@@ -43,16 +43,13 @@
       - else
         Cant find HEAD commit for this branch
 
-  - stages_status = pipeline.statuses.latest.stages_status
   %td.stage-cell
-    - pipeline.statuses.latest.stages_status.each do |stage|
-      - name = stage.first
-      - status = stage.last
-      - tooltip = "#{name.titleize}: #{status || 'not found'}"
-      - if status
+    - pipeline.stages_with_statuses.each do |stage|
+      - if stage.status
+        - tooltip = "#{stage.name.titleize}: #{stage.status || 'not found'}"
         .stage-container
-          = link_to namespace_project_pipeline_path(pipeline.project.namespace, pipeline.project, pipeline.id, anchor: stage), class: "has-tooltip ci-status-icon-#{status}", title: tooltip do
-            = ci_icon_for_status(status)
+          = link_to namespace_project_pipeline_path(pipeline.project.namespace, pipeline.project, pipeline.id, anchor: stage.name), class: "has-tooltip ci-status-icon-#{stage.status}", title: tooltip do
+            = ci_icon_for_status(stage.status)
 
   %td
     - if pipeline.duration