Rails - May 2009 - save doesn't work in migration

I''m writing a migration to merge my first and last name fields into a
single name field.  However, writing to the new name column doesn''t
work within the migration.  Why is this so?

def self.up
  add_column :users, :name, :string

  for user in User.all
    user.name = user.first_name + '' '' + user.last_name
    user.save! # <= name is not actually saved here.
  end

  remove_column :users, :first_name
  remove_column :users, :last_name
end

Never mind, after some Googling, found reset_column_info to be my
answer.

On May 6, 10:18 pm, "Eric L."
<eli...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> I''m writing a migration to merge my first and last name fields
into a
> single name field.  However, writing to the new name column
doesn''t
> work within the migration.  Why is this so?
>
> def self.up
>   add_column :users, :name, :string
>
>   for user in User.all
>     user.name = user.first_name + '' '' + user.last_name
>     user.save! # <= name is not actually saved here.
>   end
>
>   remove_column :users, :first_name
>   remove_column :users, :last_name
> end