require_relative '../../migration_helpers'
module RuboCop
module Cop
module Migration
# Cop that checks if `remove_concurrent_index` is used with `up`/`down` methods
# and not `change`.
class RemoveConcurrentIndex < RuboCop::Cop::Cop
include MigrationHelpers
MSG = '`remove_concurrent_index` is not reversible so you must manually define ' \
'the `up` and `down` methods in your migration class, using `add_concurrent_index` in `down`'.freeze
def on_send(node)
return unless in_migration?(node)
return unless node.children[1] == :remove_concurrent_index
node.each_ancestor(:def) do |def_node|
add_offense(def_node, :name) if method_name(def_node) == :change
end
end
def method_name(node)
node.children[0]
end
end
end
end
end