过滤子属性 OData 和 ASPNET WebApi

我面临一个问题。我用谷歌搜索了很多，也在这里搜索过，但我找不到这个问题的答案。

我有一个ASPNET Web Api返回JSON。我也补充一下微软数据.OData http://www.nuget.org/packages/Microsoft.Data.OData/nuget 允许 odata 查询。

对于简单的情况，它工作得很好，但现在，我需要在子集合中应用过滤器。

Sample:

{"total":1,"products":[{"id":20289,"brandId":5,"categoryId":1,"price":12.0,"name":"Carolina Herrera","description":"CH","productCode":"asd2334","picture":null,"contentPackaging":"liquid","brandName":"Carolina Herrera","brandPicture":null,"generic":true},
{"id":20290,"brandId":5,"categoryId":1,"price":25.0,"name":"Carolina Herrera 2","description":"CH 2","productCode":"asd999","picture":null,"contentPackaging":"liquid","brandName":"Carolina Herrera","brandPicture":null,"generic":true}
]}

例如，我想在产品集合中查询价格大于 20 的情况。

我尝试过这样的事情：

http://domain.com/api/$filter=products/price gt 20

但这没有用。

可以这样做吗？

Code:

//controller
public IQueryable<ViewModelProducts> GetProducts()
{
    var products = _repository.FindBy(x=>x.Generic && x.Status).ToList();

    return products.Count == 0 ? new List<ViewModelProducts>().AsQueryable() : products.AsQueryable();
}

//model
public class ViewModelProducts
{
    public int total { get; set; }
    public IQueryable<Products> products { get; set; }
}

public class Products
{
    public int id { get; set; }
    public int brandId { get; set; }
    public int categoryId { get; set; }
    public decimal price { get; set; }
    public string name { get; set; }
    public string description { get; set; }
    public string productCode { get; set; }
    public string picture { get; set; }
    public string contentPackaging { get; set; }
    public string brandName { get; set; }
    public string brandPicture { get; set; }
    public bool generic { get; set; }
}