How to render complex amount calculation templates using Qute Templating Engine

[LiuBo-keep]

I configured a currency template that includes floating-point addition, subtraction, multiplication, and division calculations, but it consistently throws an error for multiplication.
template:

{#let total = messageNotify.reservationAdults * 285.23 /}
{total}

Error message:
ProcessNotificationTemplateContent:: io.quarkus.qute.TemplateException: Rendering error: Property "" not found on the base object "com.shijigroup.kunlun.biz.hotel.notification.config.metadata.NotificationDynamicParamDto" in expression {}
at io.quarkus.qute.TemplateException$Builder.build(TemplateException.java:169)
at io.quarkus.qute.EvaluatorImpl.propertyNotFound(EvaluatorImpl.java:234)
at io.quarkus.qute.EvaluatorImpl.resolve(EvaluatorImpl.java:204)
at io.quarkus.qute.EvaluatorImpl.resolveReference(EvaluatorImpl.java:131)
at io.quarkus.qute.EvaluatorImpl.evaluate(EvaluatorImpl.java:85)
at io.quarkus.qute.ResolutionContextImpl.evaluate(ResolutionContextImpl.java:29)
at io.quarkus.qute.Futures.collectAsyncResults(Futures.java:100)
at io.quarkus.qute.Futures.evaluateParams(Futures.java:44)
at io.quarkus.qute.SectionNode$SectionResolutionContextImpl.evaluate(SectionNode.java:229)
at io.quarkus.qute.SetSectionHelper.resolve(SetSectionHelper.java:42)
at io.quarkus.qute.SectionNode.resolve(SectionNode.java:53)
at io.quarkus.qute.SectionNode.resolve(SectionNode.java:58)
at io.quarkus.qute.SectionNode$SectionResolutionContextImpl.execute(SectionNode.java:245)
at io.quarkus.qute.SectionHelper$SectionResolutionContext.execute(SectionHelper.java:66)
at io.quarkus.qute.Parser$1.resolve(Parser.java:1331)
at io.quarkus.qute.SectionNode.resolve(SectionNode.java:53)

Could you please take a look and provide some examples of complex monetary calculation templates for me to refer to?

Thank you.

[LiuBo-keep]

Is it not supported to use * or/for operations in the template？

[mkouba]

{#let total = messageNotify.reservationAdults * 285.23 /}

Multiplication and division is not supported out of the box. Addition and subtraction is supported for integer numbers, but in sections the infix notation (which is used to implement + and - operators) is only supported if parentheses are used for grouping. So something like {#let total=(foo.bar + 285) /} should work.

Could you please take a look and provide some examples of complex monetary calculation templates for me to refer to?

I would not recommend to do complex calculations in Qute templates. Qute was originally designed to contain minimal logic. Complex computations should be performed in the Java code.