Ruby on Rails: How do I add a not null constraint to an existing column using a migration?

Question

In my Rails (3.2) app, I have a bunch of tables in my database but I forgot to add a few not null constraints. I\'ve googled around but I can\'t find how to write a migration wh

Answer 1

You can also use change_column_null:

change_column_null :table_name, :column_name, false