Question

我有一个在EF数据库第一个edmx中定义的模型。从那里我暴露了一些表和视图（主要是视图）。由于可以使用OData扩充EF模型，我如何将复杂类型的导航属性添加到另一个EF和OData暴露类型？

目前，我定义了一个分部类，并使用它们添加属性和属性。但看起来可以使用OData的模型构建器功能添加所需的属性，或者可能更好，首先使用ODataConventionModelBuilder然后增加结果。唉，我无法将现有的API文档和我发现的示例拼凑成一个工作示例。

这是代码

//This class is generated from a view by EF (edmx)...
public partial class AccountView
{
    public System.Guid Id { get; set; }
    public int CompanyId { get; set; }
}

//Here's augmenting the EF generated view with some additional data...
[MetadataType(typeof(AccounViewMetaData))]
public partial class AccounView
{  
    //This is added here explicitly. AccountView itself exposes just
    //a naked key, CompanyId.
    public virtual Company Company { get; set; }

    //This is just in case...
    public class AccounViewDomainMetaData
    {
        //This is to add a navigation property to the OData $metadata. How to do this
        //in WebApiConfig? See as follows...
        [ForeignKey("Company")]
        public int CompanyId { get; set; }
    }
}

//This is an EF generated class one from an edmx..-
public partial class Company
{
    public Company() { }
    public int CompanyID { get; set; }
    public string Name { get; set; }
}

//How to add a navigation property from AccountView to Company so that it'd become
//possible to call http://example.com/Accounts?$expand=Company and http://example.com/Accounts(1)?$expand=Company ?
var builder = new ODataConventionModelBuilder();
var companySet = builder.EntitySet<Entities.Company>("Companies");
var accountSet = builder.EntitySet<Entities.AccountView>("Accounts");
accountSet.EntityType.HasKey(i => i.Id); //EF has hard time recognizing primary keys on database first views...
//How to hide this from the result if there's a way to create a ?$expand=Company navigation property?
//accountSet.EntityType.Ignore(i => i.CompanyId);

这与关于OData和模型的my other question有关。

如何在EF模型中使用ODataConventionModelBuilder构建的模型上添加复杂属性

0 个答案: