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# frozen_string_literal: true
class AddDiffTypeToMergeRequestDiffs < ActiveRecord::Migration[6.0]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
UNIQUE_INDEX_NAME = 'index_merge_request_diffs_on_unique_merge_request_id'
def up
unless column_exists?(:merge_request_diffs, :diff_type)
with_lock_retries do
add_column :merge_request_diffs, :diff_type, :integer, null: false, limit: 2, default: 1
end
end
add_concurrent_index :merge_request_diffs, :merge_request_id, unique: true, where: 'diff_type = 2', name: UNIQUE_INDEX_NAME
end
def down
remove_concurrent_index_by_name(:merge_request_diffs, UNIQUE_INDEX_NAME)
if column_exists?(:merge_request_diffs, :diff_type)
with_lock_retries do
remove_column :merge_request_diffs, :diff_type
end
end
end
end
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