我正在尝试从数据库中删除一列。我正在运行
rails generate RemoveOccupancyFromSpaces occupancy:string
但是后来收到此错误消息
Could not find generator 'RemoveOccupancyFromSpaces'. Maybe you meant 'resource_route' or 'devise:controllers' or 'active_admin:page'
Run `rails generate --help` for more options.
我在哪里错了？