entity-framework - 仅当 EntityCollection 或 EntityReference 不包含对象时才能调用 Load

Question

如标题所示，当我使用 Entity Framework 4.1 的延迟加载来关闭跟踪时，我收到了错误。

完整的异常消息:

When an object is returned with a NoTracking merge option, Load can only be called when the EntityCollection or EntityReference does not contain objects

有人知道为什么吗？

Answer 1

将 DbContext 的 Configuration.ProxyCreationEnabled 字段设置为 false:

using (var dbContext = MyDbContext())
{
    dbContext.Configuration.ProxyCreationEnabled = false;

    return dbContext.MyProducts.AsNoTracking().Where(product => product.DepartmentId = departmentId);
}