Question

This might be a entity framework related question, anyway, here goes:

Consider the following simple database schema:

CREATE TABLE Supplier(     SupplierId int identity(1,1) not null primary key,     DisplayName nvarchar(50) )  CREATE TABLE Category(     CategoryId int identity(1,1) not null primary key,     DisplayName nvarchar(50) )  CREATE TABLE Product(     ProductId int identity(1,1) not null primary key,     SupplierId int references Supplier.SupplierId,     CategoryId int references Category.CategoryId,     DisplayName nvarchar(50) ) 

What I want is to filter products based on a supplier and a category. Normally I would just supply a category id and a supplier id, but since I am exposing my database through EF, Data Services do not allow me to do something like this:

$filter=SupplierId eq 1 and CategoryId eq 2 

This seems like a pretty common scenario, so it must be possible. But how?

Answer 1

It turns out it is pretty easy, here is how it is done:

$filter=Product/Supplier/SupplierID eq 1 and Products/Category/CategoryID eq 1 

Regards.