Ruby on Rails

On 1 April 2011 12:06, Madhusudhan H R <lists@ruby-forum.com> wrote:
> Hello,
>
> I developed an app with postgres DB but want to change the DB to
> sqlite3. I changed the database adapter in the database.yml file. When I
> run the migration most of it was successful but add_column was throwing
> an error
>
> "Cannot add a NOT NULL column with default value NULL: ALTER TABLE
> "rates" ADD "customer_id" integer NOT NULL".

What is the line in your migration file that throws the error? The
error suggests that it says that the column cannot be null, but with a
default value of NULL.

>
> I made the modification and added the columns to the original migration
> of the table and ran the migration again. Everything seems to work fine.
>
> Why is add_column causing rake to abort during migration? Is there any
> patch for the problem.
>
> Regards,
> Madhusudhan.
>
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