Comments on: Database Constraints, Stereotypes, Rails, Culture, Talmud, Gender, MINASWAN, Religion. But ABSOLUTELY NO BONDAGE PLAY

By: 7fff - think max value » Blog Archive » ActiveRecord: Migrating habtm to model table suitable for has_many :through

Sun, 04 Nov 2007 23:49:15 +0000

[...] Database Constraints, Stereotypes Rails, Culture, Talmud, Gender, MINASWAN, Religion. But ABSOLUTELY… November 2nd, 2007 at 8:19 pm [...]

By: amy

amy — Sun, 04 Nov 2007 00:32:44 +0000

Mark, you are so right! It works just fine. Apparently John read on the rails wiki that you couldn’t do it, and he took their word for it. And the rails wiki just happened to be wrong, or perhaps was reporting an old bug that was no longer a problem, or whatever. Thanks for insisting it could be done. Next time I’ll just try the darn thing before posting…

By: Mark Van Holstyn

Mark Van Holstyn — Sat, 03 Nov 2007 20:01:28 +0000

I have done that many times in the past, and it works great for me. What do John and other say is the problem with that?

By: amy

amy — Sat, 03 Nov 2007 13:50:03 +0000

I haven’t tried it myself, but John and others say it doesn’t work, and I have no reason to doubt them. have you had success with it?

By: Mark Van Holstyn

Mark Van Holstyn — Sat, 03 Nov 2007 00:07:04 +0000

re: Unfortunately, as he describes, ActiveRecord won’t let you add a primary key column to an already-existing table, so he had to migrate all the data over to a new table.

What about add_column(:some_join_table, :id, :primary_key)?