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

[Katsutoshi Itoh]

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?