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require_relative '../../migration_helpers'
module RuboCop
module Cop
module Migration
# Cop that checks if `add_concurrent_foreign_key` is used instead of
# `add_foreign_key`.
class AddConcurrentForeignKey < RuboCop::Cop::Cop
include MigrationHelpers
MSG = '`add_foreign_key` requires downtime, use `add_concurrent_foreign_key` instead'.freeze
def_node_matcher :false_node?, <<~PATTERN
(false)
PATTERN
def on_send(node)
return unless in_migration?(node)
name = node.children[1]
if name == :add_foreign_key && !not_valid_fk?(node)
add_offense(node, location: :selector)
end
end
def method_name(node)
node.children.first
end
def not_valid_fk?(node)
node.each_node(:pair).any? do |pair|
pair.children[0].children[0] == :validate && false_node?(pair.children[1])
end
end
end
end
end
end
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