Re: SQL Statements Order
Re: SQL Statements Order
- Subject: Re: SQL Statements Order
- From: Marcos Trejo Munguia <email@hidden>
- Date: Tue, 14 Nov 2006 11:33:28 -0600
Could you please help me with the first solution, what delegate I need
to implement?. I'm using PostgreSQL 7.4 and it only support deferred
foreign key constraints, AFAIK.
Thank you for your help!
Cheers
On Nov 14, 2006, at 10:51 AM, Chuck Hill wrote:
Operation ordering is a fair common issue with EOF. There is a
delegate that you can implement to order the actions as you want.
However, there is an easier solution if you database supports it.
Just define the constraints as "DEFERRABLE INITIALLY DEFERRED". This
will suspend validation until a COMMIT; is issued. This is my
solution of choice.
Chuck
On Nov 13, 2006, at 2:32 PM, Marcos Trejo Munguia wrote:
Hi List,
I have the following issue, I'm using an intermediate table for a
many to many relationship
(supplier<--->>supplier_product<<--->product), the primary key of the
intermediate table is composed by the foreign keys to supplier and
product, If I delete an object fetched from the intermediate table
and then I insert another object with the same supplier, product and
save I get the next exception:
com.webobjects.eoaccess.EOGeneralAdaptorException: EvaluateExpression
failed: <com.webobjects.jdbcadaptor.PostgresqlExpression: "INSERT
INTO public.supplier_product(supplierid, productid) VALUES (?, ?)"
withBindings: 1:2(supplierid), 2:1865(productid)>:
Next exception:SQL State:23505 -- error code: 0 -- msg: ERROR:
duplicate key violates unique constraint "supplier_product_pkey"
I think that the adaptor is sending a delete and an insert but the
order is not the correct one.
Please help!
Thanks in advance.
Cheers
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