Reducing an assign and return to a single statement leads to an error. Cancel The title field is required!

1. Simon Prinsloo

   

   11 posts
   Registered:
   20 Feb 2019
   04 May 2020

   Link to this post

   We changed some code from a variable definition and two statements to a single statement, but then the code stopped working.
   
   Did anybody encounter this before? Any idea why this happens? It happens with any DatasetModel.
   
   This works:

   method public logical canFindByCustomerNumber(input icCustomerNumber as character):
       define variable CustomerDatasetModel as CustomerDatasetModel no-undo.
       assign CustomerDatasetModel = getByCustomerNumber(icCustomerNumber).
       return CustomerDatasetModel:Customer:Available.
   end method.

   
   Changing it like this does not:

   method public logical canFindByCustomerNumber(input icCustomerNumber as character):
       return getByCustomerNumber(icCustomerNumber):Customer:Available.
   end method.

   It raises error 10068:
   Lead attributes in a chained-attribute expression (a:b:c) must be type HANDLE or a user-defined type and valid (not UNKNOWN). (10068)
   
   Stepping with the debugger into the table model's available property reveals that THIS-OBJECT:BufferHandle is valid, but trying to evaluate  BufferHandle:AVAILABLE in the expressions results in "**Not available**".
   
   The following code gives the message below:

   message 
        1 valid-object(getByCustomerNumber(icCustomerNumber)) skip 
        2 valid-object(getByCustomerNumber(icCustomerNumber):Customer) skip
        3 getByCustomerNumber(icCustomerNumber):Customer:Available
        view-as alert-box.

   1 yes
   2 yes
   3

2. Mike Fechner

   

   319 posts
   Registered:
   14 Sep 2016
   06 May 2020 in reply to Simon Prinsloo

   Link to this post

   Interesting. This method here works though:
   
   

       METHOD PUBLIC LOGICAL canFindByCustomerNumber2 (piCustNum AS INTEGER):
           RETURN NEW CustomerDatasetModel():Customer:Filter:CustNum:EQ(piCustNum):CanFind() .
       END METHOD.