Re: Reducing duplicated business rules

> Of course PostgreSQL will throw back an error if I tried to insert or
> update data that will make the check constraint untrue, which is as it
> should be. Is there any way to use this feedback from Postgres instead
> of running my own checks in PHP, and still provide useful feedback to
> the user (rather than the naked PostgreSQL error code)?

I am right now also looking how to get a feedback from a postgrsql-check back to php.

I thought about using named constraints:

CREATE TABLE test (
id                            SERIAL,
[whatever fields you need]

CONSTRAINT "!!!#Please check XYZ in the formular#" CHECK ([whatever you like to test])
);

Next, I would check in php if an error occured in the sql-query, if the error includes "!!!" in the error message from
postgresqlI would display the formular again with the values already entered and I would display as a feedback to the
userthe string between the two "##": 

Please check XYZ in the formular

One drawback is of course that it will only give feedback from one error at a time.


greetings,
Daniel

--
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