Re: SQL Statements Order
Re: SQL Statements Order
- Subject: Re: SQL Statements Order
- From: Chuck Hill <email@hidden>
- Date: Tue, 14 Nov 2006 09:44:06 -0800
Project Wonder might have something. I have seen an example or two
in the past, but I don't have one that I can point you to. The
method is
EODatabaseContext.Delegate.databaseContextWillOrderAdaptorOperations
Chuck
On Nov 14, 2006, at 9:33 AM, Marcos Trejo Munguia wrote:
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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