如何在ASP.NET Core的OData中导航/配置从复杂类型到实体类型的导航？

debugcn 发表于 Dev

用户名

标题基本上是说我的问题，说我有这样的课程

public class ContrivedComplexClass
{
    public string stringy { get; set; }
    public ContrivedEntityClass ContrivedEntityClass { get; set; }
}

public class ContrivedEntityClass
{
    public Guid Id { get; set; }
    public int inty { get; set; }
}

我的控制器动作是这样的

[HttpGet]
[ODataRoute("GetContrivedComplexClass()")]
public async virtual Task<ContrivedComplexClass> GetContrivedComplexClass()
{
     await Task.Delay(10);
     ContrivedComplexClass contrivedComplexClass = new ContrivedComplexClass() { stringy = "asdf", ContrivedEntityClass = new ContrivedEntityClass() { Id = Guid.NewGuid(), inty = 3 } };
     return contrivedComplexClass;
}

我的edm模型配置如下

var builder = new ODataConventionModelBuilder(serviceProvider);
builder.EntitySet<ContrivedEntityClass>("ContrivedEntityClass").EntityType.HasKey(f => f.Id);
builder.Function("GetContrivedComplexClass").Returns<ContrivedComplexClass>();

当我从浏览器或邮递员或其他带有URL的函数调用时

https://localhost:5001/odata/GetContrivedComplexClass()?Expand=ContrivedEntityClass

它只返回复杂类型的属性，例如

{"@odata.context":"https://localhost:5001/odata/$metadata#WebPortal.ContrivedComplexClass","stringy":"asdf"}

有人知道我应该如何查询或配置它？

mj1313

将您的EDM模型配置为：

private static IEdmModel GetEdmModel()
{
    var builder = new ODataConventionModelBuilder();
    builder.EntitySet<ContrivedEntityClass>("ContrivedEntityClass").EntityType.HasKey(f => f.Id); ;
    var function = builder.Function("GetContrivedComplexClass");
    function.ReturnsFromEntitySet<ContrivedComplexClass>("GetContrivedComplexClass");
    return builder.GetEdmModel();
}

将一个密钥添加到ContrivedComplexClass：

public class ContrivedComplexClass
{
    [Key]
    public int Id { get; set; }
    public string stringy { get; set; }
    public ContrivedEntityClass ContrivedEntityClass { get; set; }
}



public class ContrivedEntityClass
{
    public Guid Id { get; set; }
    public int inty { get; set; }
}

附带网址：

https://localhost:5001/odata/GetContrivedComplexClass()?$Expand=ContrivedEntityClass

控制器：

[HttpGet]
[ODataRoute("GetContrivedComplexClass()")]
public async virtual Task<ContrivedComplexClass> GetContrivedComplexClass()
{
    await Task.Delay(3);
    ContrivedComplexClass contrivedComplexClass = new ContrivedComplexClass
    {
        Id = 1,
        stringy = "asdf",
        ContrivedEntityClass = new ContrivedEntityClass()
        {
            Id = Guid.NewGuid(),
            inty = 3
        }
    };
    return contrivedComplexClass;
}

结果：