class RemoveNullableDates < ActiveRecord::Migration def up # must drop so we can muck with the column execute "DROP VIEW badge_posts" # Rails 3 used to have nullable created_at and updated_at dates # this is no longer the case in Rails 4, some old installs have # this relic # Fix it sql = "select table_name, column_name from information_schema.columns WHERE column_name IN ('created_at','updated_at') AND table_schema = 'public' AND is_nullable = 'YES' AND is_updatable = 'YES' AND data_type = 'timestamp without time zone'" execute(sql).each do |row| table = row["table_name"] column = row["column_name"] execute "UPDATE \"#{table}\" SET #{column} = CURRENT_TIMESTAMP WHERE #{column} IS NULL" change_column table.to_sym, column.to_sym, :datetime, null: false end execute "CREATE VIEW badge_posts AS SELECT p.* FROM posts p JOIN topics t ON t.id = p.topic_id JOIN categories c ON c.id = t.category_id WHERE c.allow_badges AND p.deleted_at IS NULL AND t.deleted_at IS NULL AND NOT c.read_restricted AND t.visible" end def down # no need to revert end end