expression parse bug?

As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.

croc1

hi!
I encountered some troubles in activiti 5.9.
when parse  expression

the exception is

org.activiti.engine.impl.juel.TreeBuilderException: Error parsing '${userService.findUsers("{"id":"12"}"': syntax error at position 27, encountered 'id', expected ')'

‍‍‍‍

and the bpmn is

…
 <startEvent id="startevent1" name="Start"></startEvent>
    <userTask id="P1" name="P1" activiti:candidateUsers="${userService.findUsers(&quot;{&quot;id&quot;:&quot;12&quot;}&quot;, var1)}"></userTask>
    <endEvent id="endevent1" name="End"></endEvent>
…
‍‍‍‍‍‍‍

I want to pass a string like json in my service,but the "}" be resolved..  :?

How to solve that problem?

THX!

frederikherema1

You're using double quotes around your string literal but also including double-quotes in the string literal body… As the (J)UEL specification says:

In section 1.3, "Literals", the specification states that "Quotes only need to be escaped in a string value enclosed in the same type of quote". This suggests that, e.g., "You could escape a single quote in a double-quoted string, but it's not necessary". JUEL guesses that you can't and that the above should read as "Quotes can only be escaped in a string value enclosed in the same type of quote".

Try something like this instead:

<br>${userService.findUsers("{'id':'12'}")<br><br>or<br><br>${userService.findUsers('{"id":"12"}')<br><br>or even<br><br>${userService.findUsers("{\"id\":\"12\"}")<br>