Cannot enumerate non-scalar. a!hierarchybrowsertreefield

Question

Interface Definition: Expression evaluation error at function a!hierarchyBrowserFieldTree [line 31]: A tree browser component [label=""] encountered an error for "nextLevelValues" when fv!nodeValue was [id:0,name:JobType,description:Description for node roleType,details:I have 1 child node,type:FOUNTAIN_PEN,numberOfChildren:2,isDrillable:true]. The following error was returned: Expression evaluation error at function 'enumerate' [line 39]: Cannot enumerate non-scalar. 
 
 When I am trying to use enumerate in nextLevelValues using foreach getting this error. Please let us know any suggestions on this. Thanks in advance.

Stefan Helzle · Answer

"Scalar" data is any singular value like a single integer or text. "Non-scalar" means this is a list of some sort. 
 enumerate() can on work this scalar values.

Soma · Answer

There could be a possibility that fv!nodeValue.numberOfChildren is taken as list. Casting it to integer should solve it. Please replace the code items of foreach() if(
isnull(fv!nodeValue.numberOfChildren),
enumerate(0),
enumerate(cast(1,fv!nodeValue.numberOfChildren))
)

Akshat Lakhera · Answer

Try replacing fv!nodeValue.numberOfChildren with 
 tointeger({fv!nodeValue.numberOfChildren})

Stefan Helzle · Answer

I suspect the issue to be in line 15. Using wherecontains() will always return a ist of items.