Is there a way to do substring in Business Rules Service?

[crashmydev]

Hi everyone,

I am implementing some rules from a customer into the business rules service for cloud on CloudFoundry.

Currently, I am struggling with the requirement of the customer to perform a substring on an input value.

For example my Data Object has the field CODE and if some conditions are met, the rule should return:

CODE.substring(3,3) .

Is this somehow possible with the current functionality of Business Rules Service and Expression Language 2.0?

Thanks and kind regards,

Tim

[Archana]

Hello Tim,

You cannot do substring in business rules. Instead you can use REGEX expression to achieve the same like for example MATCHES '\w{3}5(.*)'

[Cocquerel]

You can find available functions here https://help.sap.com/docs/BUSINESS_RULES/cc9e86e62f754dff82795508324bfd0c/f1d557b2ba30469d97314336f7...

Unfortunately, I do not see any substring function. I guess the workaround would be to add a "calculated" attribute in your data object that provides directly the CODE.substring(3,3) value ready to be consumed by your rule.
Regards,

Michael

[crashmydev]

Thanks Michael!

I already saw that list, but I hoped that somebody has figured out a way to do it nevertheless.

Kind regards,

Tim