Squash old migrations

Use the `squasher` gem to squash migrations older than the start of 2018

1 files changed, 0 insertions, 37 deletions

diff --git a/db/migrate/20170713104829_add_foreign_key_to_merge_requests.rb b/db/migrate/20170713104829_add_foreign_key_to_merge_requests.rb
deleted file mode 100644
index 908b122c659..00000000000
--- a/db/migrate/20170713104829_add_foreign_key_to_merge_requests.rb
+++ /dev/null
@@ -1,37 +0,0 @@
-class AddForeignKeyToMergeRequests < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  class MergeRequest < ActiveRecord::Base
-    self.table_name = 'merge_requests'
-    include ::EachBatch
-  end
-
-  def up
-    scope = <<-SQL.strip_heredoc
-      head_pipeline_id IS NOT NULL
-        AND NOT EXISTS (
-          SELECT 1 FROM ci_pipelines
-            WHERE ci_pipelines.id = merge_requests.head_pipeline_id
-        )
-    SQL
-
-    MergeRequest.where(scope).each_batch(of: 1000) do |merge_requests|
-      merge_requests.update_all(head_pipeline_id: nil)
-    end
-
-    unless foreign_key_exists?(:merge_requests, column: :head_pipeline_id)
-      add_concurrent_foreign_key(:merge_requests, :ci_pipelines,
-                                 column: :head_pipeline_id, on_delete: :nullify)
-    end
-  end
-
-  def down
-    if foreign_key_exists?(:merge_requests, column: :head_pipeline_id)
-      remove_foreign_key(:merge_requests, column: :head_pipeline_id)
-    end
-  end
-end