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Posted to user@olingo.apache.org by Chus Picos <mp...@denodo.com> on 2016/06/23 16:03:48 UTC

Inherited Entities

Hi,

I am dealing with entities that have a base type and I have a doubt about
the projection of the properties.

This is a sample:
http://services.odata.org/V4/OData/(S(h3pggazgkuei3wtiwn3aeclv))/OData.svc/Persons

In the response there are two customers and two employees. You can use
$select=* in the request and the response will be the same but I have not
found the syntax to specify the customer properties or employee properties.
I mean, I want to know if it is possible to do something like this:

http://services.odata.org/V4/OData/(S(h3pggazgkuei3wtiwn3aeclv))/OData.svc/Persons?$select=ID,Name,TotalExpense,HireDate

Thanks and regards.


--

Re: Inherited Entities

Posted by "Bolz, Michael" <mi...@sap.com>.

Hi,

as described here [1] you can cast to the desired type and then select the property:
http://services.odata.org/V4/OData/(S(h3pggazgkuei3wtiwn3aeclv))/OData.svc/Persons/ODataDemo.Employee/?$select=Salary <http://services.odata.org/V4/OData/(S(h3pggazgkuei3wtiwn3aeclv))/OData.svc/Persons/ODataDemo.Employee/?$select=Salary>

An selection for the Employee/Salary will lead to an exception:
http://services.odata.org/V4/OData/(S(h3pggazgkuei3wtiwn3aeclv))/OData.svc/Persons?$select=ODataDemo.Employee/Salary <http://services.odata.org/V4/OData/(S(h3pggazgkuei3wtiwn3aeclv))/OData.svc/Persons?$select=ODataDemo.Employee/Salary>

Kind Regards,
Michael

[1]: http://docs.oasis-open.org/odata/odata/v4.0/cs01/part2-url-conventions/odata-v4.0-cs01-part2-url-conventions.html#_Addressing_Derived_Types <http://docs.oasis-open.org/odata/odata/v4.0/cs01/part2-url-conventions/odata-v4.0-cs01-part2-url-conventions.html#_Addressing_Derived_Types>

> On 23 Jun 2016, at 18:03, Chus Picos <mp...@denodo.com> wrote:
> 
> Hi,
> 
> I am dealing with entities that have a base type and I have a doubt about the projection of the properties.
> 
> This is a sample: http://services.odata.org/V4/OData/(S(h3pggazgkuei3wtiwn3aeclv))/OData.svc/Persons <http://services.odata.org/V4/OData/(S(h3pggazgkuei3wtiwn3aeclv))/OData.svc/Persons>
> 
> In the response there are two customers and two employees. You can use $select=* in the request and the response will be the same but I have not found the syntax to specify the customer properties or employee properties. I mean, I want to know if it is possible to do something like this:
> 
> http://services.odata.org/V4/OData/(S(h3pggazgkuei3wtiwn3aeclv))/OData.svc/Persons?$select=ID,Name,TotalExpense,HireDate <http://services.odata.org/V4/OData/(S(h3pggazgkuei3wtiwn3aeclv))/OData.svc/Persons?$select=ID,Name,TotalExpense,HireDate>
> 
> Thanks and regards.
> 
> 
> -- 
> 
>