[web-devel] [Yesod] database tables migration problem.

Hi I am developping web service *incrementally* by using devel-server. This is very good feel. but, a bit problem occurred, when the program install and setup new mathine. This service's Model.hs has 2 tables these are cross-reference like as below. User : avatar FileHeaderId Update : FileHeader : creator UserId : i settled like ... 1. migrate tables which has no column without id. 2. alter add columns. i think yesod should separate the migration to 2 steps. 1 is to create tables these has no columns without id. 2 is to add colums and so on. How about this?