Rails - does a change_column migration affect existing constraints?

All migration changes are relative to current database state, you don't need to list all existing changes from the beginning.

All migration changes are relative to current database state, you don't need to list all existing changes from the beginning. Good way to became sure is simply perform a test. Gl.

Sounds good. Before I can upcheck, please answer: - so how do I remove a constraint (other than rollback)? I had thought that when I looked at the traditional 'downs' they just omitted the value, no?

Btw I am also posing this for others :) – Michael Durrant Oct 21 at 0:49 if you have defined up migration change_column, down one should be the same with reverse action explicitly specified – sarvavijJana Oct 21 at 6:00 say a column has 6 existing constraints (db already existed). How do I write a new (i.e. Up) migration to drop just one constraint?

– Michael Durrant Oct 28 at 0:20 absolutely not sure, that answer is still actual. Anyway: in your case you should change_column enumerate all valid constraints except deprecated one – sarvavijJana Nov 6 at 19:01.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.