Ruby on Rails

Colin Law wrote in post #990365:
> 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.

Yes the error message is Cannot add a NOT NULL column with default value
NULL: ALTER TABLE "rates" ADD "customer_id" integer NOT NULL

The migration line which is causing the problem is

add_column :rates, :customer_id, :integer, :null => false

How can I fix this problem?

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