CAP insertable service error with DB defaults

[dvvelzen]

Hi,

I've created a new cds project with cds init and created a db/ and srv/ service.

The db service is using a not null field with a default. The service is a projection with with Capabilities annotation;

db/

entity Test { 
  key ID : UUID; 
  VAL: Integer default 12 not null 
}

srv/

@Capabilities: { Insertable: true, Updatable: false, Deletable:false }
entity Test as projection on my.Test; 

When doing a POST to create a new entry with only the ID field supplied I get the following error:

{
 "error": {
 "code": null,
 "message": "An error occurred during serialization of the entity. Not nullable value for 'VAL' must not be null."
 }
}

The insert did work though as it is in the database. Secondly if I set Updatable to true the service works normally and returns the created entity without an error.

/D

[vobu]

hi, i'm guessing that you would expect the POST to either not work at all (incl persistence) or work with a warning (given that you set a default value for VAL). right?
but -without any pun intended- i don't fully get
VAL: Integer default 12 not null
b/c i'd rather expect
VAL: Integer not null
or
VAL: Integer default 12
why both default and not null?

[dvvelzen]

Hi,

I would expect the Insertable (POST) to work by sending "ID" only and getting a return of "ID" and "VAL". "VAL" having the value of the default as it is not supplied.

If I do the above INSERT. With Updatable: true => this works ok.
If I do the above INSERT. With Updatable: false => this enters a records in DB, but throws an error on the service.

HTH,
Dennis

[dvvelzen]

Seems to be picked up based on the initial question on the community page;

https://answers.sap.com/answers/12950237/view.html