Question

我有订单和订单产品。

然后我有以下viewmodel ...

public class orders
{
    [Key]
    public int orderid { get; set; }
    public int userid { get; set; }
    public System.DateTime createdate { get; set; }
    public string orderstatus { get; set; }

    public virtual ICollection<orderproduct> orderproducts { get; set; }
}

public class orderproducts
{
    [Key]
    public int orderproductid { get; set; }
    public int productid { get; set; }
    public int orderid { get; set; }

    public virtual order order { get; set; }
    public virtual product product { get; set; }
}

和db context ...

namespace salesWebTest.DAL
{
public class nviewContext : DbContext
{
public nviewContext() : base()
    {
        Configuration.LazyLoadingEnabled = true;
    }

    public nviewContext(string Connection) : base(Connection)
    {
        Configuration.LazyLoadingEnabled = true;
    }


    public DbSet<salesWebTest.viewModel.orders> orders { get; set; }
    public DbSet<salesWebTest.viewModel.orderproducts> orderproducts { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);
        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
    }
}
}

我正在使用以下操作返回JSON ...

public IQueryable<orders> Getorders()
    {
        IQueryable<orders> o = db.orders;
        return o;
    }

我收到错误“'ObjectContent`1'类型无法序列化内容类型的响应正文”

我已将以下内容添加到我的global.asax ...

GlobalConfiguration.Configuration.Formatters.JsonFormatter.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
        GlobalConfiguration.Configuration.Formatters.Remove(GlobalConfiguration.Configuration.Formatters.XmlFormatter);

如果我从viewmodel和数据上下文中删除orderproducts实体，则订单会成功返回。

关于相关实体为何导致序列化问题的任何想法？

Answer 1

尝试禁用lazyload，如果您不想禁用lazyload而不是从数据库返回实体，请创建自己的Model类以返回数据。

Web API 2相关实体

1 个答案: