In the following inheritance hierarchy, I have an action called 'SetWheelCount' defined for the Motorcyle entity type.

Vehicle -> Motorcycle -> SportBike

In my controller i am returning an instance of Motorcycle for which i expected to see an action advertisement, but there is no advertisement.

Model:

static IEdmModel GetImplicit_InheritanceModel()

    {
        ODataConventionModelBuilder modelBuilder = new ODataConventionModelBuilder();
        var vehicles = modelBuilder.EntitySet<Vehicle>("Vehicles");

        var config = modelBuilder.Entity<Motorcycle>().Action("SetWheelCount");
        config.Parameter<int>("newCount");
        config.ReturnsFromEntitySet<Vehicle>("Vehicles");

        return modelBuilder.GetEdmModel();
    }

Metadata

<?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="1.0" xmlns:edmx="http://schemas.microsoft.com/ado/2007/06/edmx">
<edmx:DataServices m:DataServiceVersion="1.0" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">

<Schema Namespace="ODataService" xmlns="http://schemas.microsoft.com/ado/2009/11/edm">
  <EntityType Name="Vehicle">
    <Key>
      <PropertyRef Name="Id" />
    </Key>
    <Property Name="Id" Type="Edm.Int32" Nullable="false" />
    <Property Name="Model" Type="Edm.String" />
    <Property Name="Name" Type="Edm.String" />
    <Property Name="WheelCount" Type="Edm.Int32" Nullable="false" />
  </EntityType>
  <EntityType Name="Motorcycle" BaseType="ODataService.Vehicle">
    <Property Name="CanDoAWheelie" Type="Edm.Boolean" Nullable="false" />
  </EntityType>
  <EntityType Name="Car" BaseType="ODataService.Vehicle">
    <Property Name="SeatingCapacity" Type="Edm.Int32" Nullable="false" />
  </EntityType>
  <EntityType Name="SportBike" BaseType="ODataService.Motorcycle">
    <Property Name="TopSpeed" Type="Edm.Int64" Nullable="false" />
  </EntityType>
</Schema>
<Schema Namespace="Default" xmlns="http://schemas.microsoft.com/ado/2009/11/edm">
  <EntityContainer Name="Container">
    <EntitySet Name="Vehicles" EntityType="ODataService.Vehicle" />
    <FunctionImport Name="SetWheelCount" ReturnType="ODataService.Vehicle" IsBindable="true" EntitySet="Vehicles" m:IsAlwaysBindable="true">
      <Parameter Name="bindingParameter" Type="ODataService.Motorcycle" />
      <Parameter Name="newCount" Type="Edm.Int32" />
    </FunctionImport>
  </EntityContainer>
</Schema>

</edmx:DataServices>
</edmx:Edmx>

Controller:

public class VehiclesController : ApiController

{
    public IEnumerable<Vehicle> Get()
    {
        List<Vehicle> vehicles = new List<Vehicle>();
        vehicles.Add(new Motorcycle()
        {
            Id = 1,
            Model = "Ducati",
            Name = "Z50",
            CanDoAWheelie = true,
        });

        return vehicles;
    }
}

Response:

HTTP/1.1 200 OK
Content-Length: 303
Content-Type: application/json; odata=verbose; charset=utf-8
Server: Microsoft-HTTPAPI/2.0
DataServiceVersion: 3.0;
Date: Mon, 08 Oct 2012 21:56:21 GMT

{
"d":{

"results":[
  {
    "__metadata":{
      "id":"http://kirandesktop:50231/Vehicles(1)","uri":"http://kirandesktop:50231/Vehicles(1)","type":"ODataService.Motorcycle"
    },"Id":1,"Model":"Ducati","Name":"Z50","WheelCount":2,"CanDoAWheelie":true
  }
]

}
}