Make retried to be nullable

app/models/commit_status.rb

@@ -31,7 +31,7 @@ class CommitStatus < ActiveRecord::Base
       false, all_state_names - [:failed, :canceled, :manual])
   end
 
-  scope :latest, -> { where(retried: false) }
+  scope :latest, -> { where(retried: [false, nil]) }
   scope :retried, -> { where(retried: true) }
   scope :ordered, -> { order(:name) }
   scope :latest_ordered, -> { latest.ordered.includes(project: :namespace) }

app/models/concerns/has_status.rb

@@ -22,7 +22,7 @@ module HasStatus
       skipped = scope.skipped.select('count(*)').to_sql
       canceled = scope.canceled.select('count(*)').to_sql
 
-      "(CASE
+    "(CASE
         WHEN (#{builds})=(#{skipped}) THEN 'skipped'
         WHEN (#{builds})=(#{success}) THEN 'success'
         WHEN (#{builds})=(#{created}) THEN 'created'

app/services/ci/retry_build_service.rb

@@ -30,8 +30,8 @@ module Ci
 
       Ci::Build.transaction do
         # mark all other builds of that name as retried
-        build.pipeline.builds.where(name: build.name)
-          .where.not(retried: true)
+        build.pipeline.builds.latest
+          .where(name: build.name)
           .update_all(retried: true)
 
         project.builds.create!(Hash[attributes])

db/migrate/20170503004426_add_retried_to_ci_build.rb

@@ -3,13 +3,7 @@ class AddRetriedToCiBuild < ActiveRecord::Migration
 
   DOWNTIME = false
 
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default(:ci_builds, :retried, :boolean, default: false)
-  end
-
-  def down
-    remove_column(:ci_builds, :retried)
+  def change
+    add_column(:ci_builds, :retried, :boolean)
   end
 end

db/post_migrate/20170503004427_upate_retried_for_ci_build.rb

@@ -20,7 +20,7 @@ class UpateRetriedForCiBuild < ActiveRecord::Migration
     is_retried = Arel.sql("((#{latest_id}) != ci_builds.id)")
 
     update_column_in_batches(:ci_builds, :retried, is_retried) do |table, query|
-      query.where(table[:retried].eq(false))
+      query.where(table[:retried].eq(nil))
     end
   end
 

db/schema.rb

@@ -232,7 +232,7 @@ ActiveRecord::Schema.define(version: 20170504102911) do
     t.integer "lock_version"
     t.string "coverage_regex"
     t.integer "auto_canceled_by_id"
-    t.boolean "retried", default: false, null: false
+    t.boolean "retried"
   end
 
   add_index "ci_builds", ["commit_id", "stage_idx", "created_at"], name: "index_ci_builds_on_commit_id_and_stage_idx_and_created_at", using: :btree