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# frozen_string_literal: true
class AddCampaignToInProductMarketingEmail < Gitlab::Database::Migration[1.0]
disable_ddl_transaction!
TARGET_TABLE = :in_product_marketing_emails
UNIQUE_INDEX_NAME = :index_in_product_marketing_emails_on_user_campaign
CONSTRAINT_NAME = :in_product_marketing_emails_track_and_series_or_campaign
TRACK_AND_SERIES_NOT_NULL_CONSTRAINT = 'track IS NOT NULL AND series IS NOT NULL AND campaign IS NULL'
CAMPAIGN_NOT_NULL_CONSTRAINT = 'track IS NULL AND series IS NULL AND campaign IS NOT NULL'
def up
change_column_null TARGET_TABLE, :track, true
change_column_null TARGET_TABLE, :series, true
# rubocop:disable Migration/AddLimitToTextColumns
# limit is added in 20220420034519_add_text_limit_to_in_product_marketing_email_campaign.rb
add_column :in_product_marketing_emails, :campaign, :text, if_not_exists: true
# rubocop:enable Migration/AddLimitToTextColumns
add_concurrent_index TARGET_TABLE, [:user_id, :campaign], unique: true, name: UNIQUE_INDEX_NAME
add_check_constraint TARGET_TABLE,
"(#{TRACK_AND_SERIES_NOT_NULL_CONSTRAINT}) OR (#{CAMPAIGN_NOT_NULL_CONSTRAINT})",
CONSTRAINT_NAME
end
def down
remove_check_constraint TARGET_TABLE, CONSTRAINT_NAME
remove_concurrent_index TARGET_TABLE, [:user_id, :campaign], name: UNIQUE_INDEX_NAME
remove_column :in_product_marketing_emails, :campaign, if_exists: true
# Records that previously had a value for campaign column will have NULL
# values for track and series columns so we can't reverse
# change_column_null.
end
end
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