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# frozen_string_literal: true
class DescriptionVersion < ApplicationRecord
belongs_to :issue
belongs_to :merge_request
validate :exactly_one_issuable
def self.issuable_attrs
%i(issue merge_request).freeze
end
def issuable
issue || merge_request
end
private
def exactly_one_issuable
issuable_count = self.class.issuable_attrs.count { |attr| self["#{attr}_id"] }
if issuable_count != 1
errors.add(
:base,
_("Exactly one of %{attributes} is required") %
{ attributes: self.class.issuable_attrs.join(', ') }
)
end
end
end
DescriptionVersion.prepend_mod_with('DescriptionVersion')
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