Re: referential integrity violation

Yes but i am submitting a null value, i submit nothing for slip_printer and i get that error. Same goes for any value that is not restrcited by NOT NULL, the reason i dont restrict them to null is that i want it to be able to be empty. So i still dont get it :) From what i can tell i may as well make everything NOT NULL and creat a dummy entry to reference to for NULL values.

hope that makes sense :)

Merritt

On Fri, 18 Oct 2002 at 10:34:31 -0400, Darren Ferguson wrote:
> What is happening is that you are trying to insert and id for slip
> printer into the TABLE pc but the id does not exist in the slip printer
> table.
>
> Since you have slip_printer in pc table and you specified that it
> references the slip_printer table id then you must have an id in slip
> printer for it to insert into the pc table unless you insert a null value
> since you did not specify the constraint on the table
>
> HTH
>
> On Fri, 18 Oct 2002 mk(at)fashaf(dot)co(dot)za wrote:
>
> > Hi guys
> >
> > I have created a Pg DB, Ive included 2 of the tables.
> > When inserting non NULL values everything works just fine,
> > but when i want to leave a table empty i get the following error:
> >
> > EXEC: ERROR: referential integrity violation - key referenced from pc not found in slip_printer
> >
> > Im recieving the information from a Perl CGI form that is filled in and then INSERT it using perl DBI
> >
> > If any more information is needed please let me know. As far as i know i should be allowed to have null.
> >
> > TIA
> > Merritt
> >
> > CREATE TABLE slip_printer (
> > id SERIAL PRIMARY KEY,
> > make VARCHAR(256) NOT NULL,
> > model VARCHAR(256) NOT NULL,
> > UNIQUE (make, model)
> > );
> >
> > CREATE TABLE pc (
> > id SERIAL PRIMARY KEY,
> > store INTEGER REFERENCES store (id) NOT NULL,
> > cpu_type INTEGER REFERENCES cpu_type (id) NOT NULL,
> > cpu_mhz INTEGER REFERENCES cpu_mhz (id) NOT NULL,
> > memory_type INTEGER REFERENCES memory_type (id) NOT NULL,
> > memory_amount INTEGER, /* amount of chips/sticks, not size in MB */
> > hdd INTEGER REFERENCES hdd (id),
> > hdd_serial VARCHAR(256),
> > monitor INTEGER REFERENCES monitor (id) NOT NULL,
> > slip_printer INTEGER REFERENCES slip_printer (id),
> > report_printer INTEGER REFERENCES report_printer (id),
> > cash_drawer INTEGER REFERENCES cash_drawer (id) NOT NULL,
> > scanner INTEGER REFERENCES scanner (id) NOT NULL,
> > ups INTEGER REFERENCES ups (id),
> > modem INTEGER REFERENCES modem (id)
> > );
> >
>
> --
> Darren Ferguson
>
>
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