-class OrderRelationMembers < ActiveRecord::Migration
+require "migrate"
+
+class OrderRelationMembers < ActiveRecord::Migration[5.0]
def self.up
# add sequence column. rails won't let us define an ordering here,
# as defaults must be constant.
add_column(:relation_members, :sequence_id, :integer,
:default => 0, :null => false)
- # update the sequence column with default (partial) ordering by
+ # update the sequence column with default (partial) ordering by
# element ID. the sequence ID is a smaller int type, so we can't
# just copy the member_id.
execute("update relation_members set sequence_id = mod(member_id, 16384)")
- # need to update the primary key to include the sequence number,
+ # need to update the primary key to include the sequence number,
# otherwise the primary key will barf when we have repeated members.
# mysql barfs on this anyway, so we need a single command. this may
# not work in postgres... needs testing.