On 6/19/06, Dennis Bekkering <[EMAIL PROTECTED]> wrote:

When i add a record to a collection that is of type many 2 many the
following sql is executed

INSERT INTO m2m_196 (ruleValueListId,ruleValueId) VALUES (?,?) , the id
field is not specified in the query but the table has such a field and
therefore oracle complains about the fact that the id is not there. I know
that i could do without an id field and use a composit id but i rather move
on  without having to change all my tables. I dont believe i can let oracle
asign id's automatically like on mysql. Is there a solution to this problem?

From what I gather Oracle complains about a missing primary key in the
table m2m_196, right ? If that's the case, then there are two easy
solutions that I can think of:

* If the pair (ruleValueListId,ruleValueId) is unique in the table,
then you can generate a composite primary key with these two columns.

* Otherwise, you should define a sequence and add a new column to the
table for the primary key. Something like this:

http://www.lifeaftercoffee.com/2006/02/17/how-to-create-auto-increment-columns-in-oracle/

In this case, OJB will not have anything to do with the primary key of
the m:n table.

Tom

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