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path: root/db/post_migrate/20180424151928_fill_file_store.rb.rb
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class FillFileStore < ActiveRecord::Migration
  include Gitlab::Database::MigrationHelpers

  DOWNTIME = false

  disable_ddl_transaction!

  class JobArtifact < ActiveRecord::Base
    include EachBatch
    self.table_name = 'ci_job_artifacts'
    BATCH_SIZE = 10_000

    def self.queue_background_migration
      self.class.where(file_store: nil).tap do |relation|
        queue_background_migration_jobs_by_range_at_intervals(relation,
          'FillFileStoreJobArtifact',
          5.minutes,
          batch_size: BATCH_SIZE)
      end
    end
  end

  class LfsObject < ActiveRecord::Base
    include EachBatch
    self.table_name = 'lfs_objects'
    BATCH_SIZE = 10_000

    def self.queue_background_migration
      self.class.where(file_store: nil).tap do |relation|
        queue_background_migration_jobs_by_range_at_intervals(relation,
          'FillFileStoreLfsObject',
          5.minutes,
          batch_size: BATCH_SIZE)
      end
    end
  end

  class Upload < ActiveRecord::Base
    include EachBatch
    self.table_name = 'uploads'
    BATCH_SIZE = 10_000

    def self.queue_background_migration
      self.class.where(store: nil).tap do |relation|
        queue_background_migration_jobs_by_range_at_intervals(relation,
          'FillFileStoreUpload',
          5.minutes,
          batch_size: BATCH_SIZE)
      end
    end
  end

  def up
    disable_statement_timeout

    # NOTE: Schedule background migrations that fill 'NULL' value by '1'(ObjectStorage::Store::LOCAL) on `file_store`, `store` columns
    # 
    # Here are the target columns
    # - ci_job_artifacts.file_store
    # - lfs_objects.file_store
    # - uploads.store

    FillFileStore::JobArtifact.queue_background_migration
    FillFileStore::LfsObject.queue_background_migration
    FillFileStore::Upload.queue_background_migration
  end

  def down
    # noop
  end
end