you do not need this because you can already do it.

requires=IS_NOT_IN_DB(db
(db.table.field1==request.vars.field1),'table.field2')

Massimo



On Dec 12, 2:20 pm, Timothy Farrell <tfarr...@swgen.com> wrote:
> Yes, this would require changing some things in gluon.validators and 
> gluon.html.  I'm of the mindset that this sort of validator is very 
> important.  However, I'll have to look into it later.  Could you send me your 
> code if you still have it?
> Thanks,
>   tim
> DenesL wrote:Oops, I misunderstood your goal. Actually I wrote a 
> ROW_NOT_IN_DB validator which did not get Massimo's approval, but looking 
> back it might have been because I used a bad example to make the case. 
> Anyways, just coding the validator was not enough, I had to modify a few 
> things in gluon too. On Dec 12, 12:19 pm, Timothy 
> Farrell<tfarr...@swgen.com>wrote:Help me understand how this works. "value", 
> in the expression, gets replaced with the value being validated, correct? If 
> so, then your suggestions check if field1 == field2. That's not quite what 
> I'm looking for. What I'm looking for would be something like 
> this:ARE_NOT_IN_DB(db, 'table', ['field1', 'field2', 'field3], 
> error_message='ACK!') I think I'll have to code this up real quick. DenesL 
> wrote:You can probably tailor this to your needs: 
> db.mytable.field2.requires=IS_EXPR('value==%s' % repr 
> (request.vars.field1),error_message='oops!') or the equivalent (and more 
> flexible): db.mytable.field2.requires=IS_EXPR('True' ),error_message='oops!') 
> db.mytable.field2.requires.expressions='value==%s' % repr 
> (request.vars.field1)-- Timothy Farrell<tfarr...@swgen.com>Computer Guy 
> Statewide General Insurance Agency (www.swgen.com)-- Timothy 
> Farrell<tfarr...@swgen.com>Computer Guy Statewide General Insurance Agency 
> (www.swgen.com)
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