Include computed properties (with '$compute') by default on payload

[julealgon]

The $compute query option is pretty awesome in that it allows arbitrary projection and creation of computed properties based on other existing properties.

However, using it is a bit cumbersome IMHO: you not only have to create the property in the $compute query option, but you also have to explicitly select it in $select. This feels really counterintuitive to me:

GET /api/products/1?$compute=Price mult Quantity as TotalPrice

The query above creates the TotalPrice computed property, but it is otherwise completely ignored. To actually add the property to the result set, you have to explicitly include it with either:

GET /api/products/1?$compute=Price mult Quantity as TotalPrice&$select=Name, SomeOtherProductProperty, Quantity, Price, TotalPrice

Or with a "include all" select:

GET /api/products/1?$compute=Price mult Quantity as TotalPrice&$select=*

Wouldn't it make a lot more sense and be significantly more intuitive to just add the computed properties in the resulting payload by default?

Relevant sections in the spec:

• 11.2.5.1 System Query Option $select

If the $select query option is not specified, the service returns the full set of properties or a default set of properties. The default set of properties MUST include all key properties. Services may change the default set of properties returned. This includes returning new properties by default and omitting properties previously returned by default. Clients that rely on specific properties in the response MUST use $select with the required properties or with *.

• 11.2.5.3 System Query Option $compute

Computed properties SHOULD be included as dynamic properties in the result and MUST be included if $select is specified with the computed property name, or star (*).