Aggregate SUM on lines object Service Layer

[former_member559169]

Hello,

Is it possible to do a aggregate (sum) on line level.

See example below.

/b1s/v2/ProductTrees?$apply=aggregate(ProductTreeLines/Price with sum as TotalDocRate)

I get the followin message back:

{ "error": { "code": -1000, "message": { "lang": "en-us", "value": "Not supported query option: invalid property 'ProductTreeLines/Price' of entity type 'ProductTree'" } } }

Kind regards,

Mark van der Steen