[rules-users] Data comparing in CONDITION column decision table
Michael Anstis
michael.anstis at gmail.com
Mon Mar 19 17:57:31 EDT 2012
This is true, but be aware that if a cell value in the Template data is
empty the whole Fact Pattern is omitted.
For example:-
rule "Discount @{row.rowNumber}"
when
Account( $v : @{field} != null )
$c : Customer( @{field} == $v , accno == @{accno} )
then
$c.setDiscount(1);
end
If "field" is empty neither "Account" or "Customer" will be included in the
generated DRL.
If "accno" is empty "Customer" will not be included in the generated DRL.
This may have an impact on what you want to achieve.
With kind regards,
Mike
On 19 March 2012 21:29, Vincent LEGENDRE
<vincent.legendre at eurodecision.com>wrote:
> Hi
>
> Instead of using a workaround, did you have a look to rule templates ?
> - under guvnor :
> http://docs.jboss.org/drools/release/5.4.0.Beta2/drools-guvnor-docs/html_single/index.html#d0e1143
> - drl :
> http://docs.jboss.org/drools/release/5.4.0.Beta2/drools-expert-docs/html_single/index.html#d0e7501
>
> You should be able to do exactly what you are trying to do, but properly,
> like that :
>
> template header
> field
> accno
>
> package range;
>
> template "Discount"
> rule "Discount @{row.rowNumber}"
> when
> Account( $v : @{field} != null )
> $c : Customer( @{field} == $v , accno == @{accno} )
> then
> $c.setDiscount(1);
> end
> end template
>
>
> ----- Mail original -----
> De: "Sumeet Karawal" <sumeet.karawal at tcs.com>
> À: "Rules Users List" <rules-users at lists.jboss.org>
> Envoyé: Jeudi 15 Mars 2012 14:20:01
> Objet: Re: [rules-users] Data comparing in CONDITION column decision table
>
> I inserted Account column with values that are always true.
>
> Works fine. :)
>
> Will try the same with 5.3 .
>
> Thanks & Regards,
> Sumeet
>
>
>
>
> From: Wolfgang Laun <wolfgang.laun at gmail.com>
>
> To: Rules Users List <rules-users at lists.jboss.org>
>
> Date: 03/15/2012 05:30 PM
>
> Subject: Re: [rules-users] Data comparing in CONDITION column decision
> table
>
> Sent by: rules-users-bounces at lists.jboss.org
>
>
>
>
>
>
> The documentation for 5.3.0 says
> <quote>
> To include a pattern without constraints, you can write the pattern in
> front of the text for another pattern.
> </quote>
> but it does not work with 5.2.0 and (likely) later versions.
>
> As a workaround, re-insert the Account column and use a redundant
> condition that is certainly true for all facts.
>
> I'll have to look into this.
>
> -W
>
>
> On 15/03/2012, Sumeet Karawal <sumeet.karawal at tcs.com> wrote:
> > Hi Wolfgang
> >
> > any other way to achieve this. I have tried many times, but no success
> till
> > now :(
> >
> > Thanks,
> > Sumeet
> >
> >
> >
> >
> > From: Sumeet Karawal <sumeet.karawal at tcs.com>
> >
> >
> > To: Rules Users List <rules-users at lists.jboss.org>
> >
> >
> > Date: 03/15/2012 04:24 PM
> >
> >
> > Subject: Re: [rules-users] Data comparing in CONDITION column
> decision
> > table
> >
> > Sent by: rules-users-bounces at lists.jboss.org
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > After doing the changes, its taking the rules as:
> >
> > rule "Discount_10"
> > when
> >
> $a:Account(type ==
> $a.getType(), accno == 1001)
> > $c:Customer
> > then
> >
> $c.setDiscount(1);
> > end
> >
> >
> > and if I put it as $a: Account() $c: Customer(), it takes the rules as:
> >
> > rule "Discount_10"
> > when
> >
> $a:Account(type ==
> $a.getType(), accno == 1001)
> > $c:Customer()
> > then
> >
> $c.setDiscount(1);
> > end
> >
> > Both these throw error..
> >
> >
> >
> > neither putting the $c:Customer before $a:Account is getting executed.
> >
> >
> > Thanks & Regards,
> > Sumeet
> > Mailto: sumeet.karawal at tcs.com
> >
> >
> >
> > From: Wolfgang Laun <wolfgang.laun at gmail.com>
> >
> >
> > To: Rules Users List <rules-users at lists.jboss.org>
> >
> >
> > Date: 03/15/2012 04:06 PM
> >
> >
> > Subject: Re: [rules-users] Data comparing in CONDITION column
> decision
> > table
> >
> > Sent by: rules-users-bounces at lists.jboss.org
> >
> >
> >
> >
> >
> >
> >
> > On 15/03/2012, Sumeet Karawal <sumeet.karawal at tcs.com> wrote:
> >>
> >> How to make changes to the decision table entries to get a drl of this
> >> kind:
> >>
> >
> > Put
> > $a: Account() $c: Customer
> > into the cell where you now have $c : Customer and delete the Account
> > column.
> > -W
> >
> >>
> >> rule "Discount_10"
> >> when
> >>
> $a : Account()
> >>
> $c : Customer(type ==
> > $a.getType(), accno == 1001)
> >> then
> >>
> $c.setDiscount(1);
> >> end
> >>
> >>
> >> Thanks,
> >> Sumeet
> >> Mailto: sumeet.karawal at tcs.com
> >>
> >>
> >>
> >> From: Wolfgang Laun <wolfgang.laun at gmail.com>
> >>
> >>
> >> To: Rules Users List <rules-users at lists.jboss.org>
> >>
> >>
> >> Date: 03/15/2012 02:47 PM
> >>
> >>
> >> Subject: Re: [rules-users] Data comparing in CONDITION column
> > decision
> >> table
> >>
> >> Sent by: rules-users-bounces at lists.jboss.org
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> Line breaks were lost in transit, but I think that you should remove
> >> the quotes from
> >>
> >> type == "$param"
> >>
> >> if you insert an expression $a.getType().
> >>
> >> -W
> >>
> >>
> >> On 15/03/2012, Sumeet Karawal <sumeet.karawal at tcs.com> wrote:
> >>>
> >>> Hi,
> >>>
> >>> Can we use a data value of another object in the condition column of a
> >>> Spreadsheet.
> >>>
> >>> For example: I have two data types(POJOs) one com.bank.Customer and
> > other
> >>> com.bank.Account
> >>>
> >>> in the rules I want to check whether the value entered for a particular
> >>> field in Customer class is equal to the value entered for the
> >> corresponding
> >>> field in the Account class. eg Customer.accType = Account.accType()
> >>>
> >>>
> >>> How can we achieve this using Decision table (CONDITION Column). I have
> >>> tried this:
> >>>
> >>> --------------------------------------------
> >>> |RuleTable
> >>> |Discount
> >>> --------------------------------------------
> >>> |CONDITION |CONDITION |
> >>> ---------------+----------------------------|
> >>> |$a : Account |$c : Customer |
> >>> ---------------+----------------------------|
> >>> | |type == "$param"
> >>> ----------+---------------+----------------------------
> >>> | Discount | Account | Type |
> >>> | Rules | | |
> >>> |----------+---------------+----------------------------|
> >>> | 1 | | $a.getType() |
> >>> |----------+---------------+----------------------------|
> >>> | 2 | | $a.getType() |
> >>> |----------+---------------+----------------------------|
> >>> | 3 | | $a.getType() |
> >>> |----------+---------------+----------------------------|
> >>> | 4 | | $a.getType() |
> >>> |----------+---------------+----------------------------|
> >>> | 5 | | $a.getType() |
> >>> |----------+---------------+----------------------------|
> >>> | 6 | | $a.getType() |
> >>> |----------+---------------+----------------------------|
> >>>
> >>>
> >>>
> >>>
> >>> But it won't work. It would be great if somebody could help me on this.
> >>>
> >>> Thanks & Regards,
> >>> Sumeet Karawal
> >>> Mailto: sumeet.karawal at tcs.com
> >>>
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