因此，我将使用FluentNHibernate调用存储库来检索复杂对象图的根对象。 但对于某些子级别对象，我不想检索所有元素，而只检索日期参数等于某些条件的元素。 在下面的代码中，我希望OrderTime字段以这种方式过滤较低级别的Order对象。 
 
 含义我想检索所有用户的所有用户组，但每个用户的订单对象只包含来自特定日期或日期范围的订单。 
 
 那么我对如何检索这个对象图有什么选择呢？ 我不想延迟加载，我只想指定一些不同的检索条件，这些条件永远不会改变。 所以它们可以是存储库的独立功能，就像最后建议的那样。 但是，我将如何编写这些方法，如何指定这些条件？ 
 
 对象： 
 
public class UserGroup
{
    public int Id;
    public IList<User> Users;
}

public class User
{
    public int Id;
    public string Name;
    public IList<Order> Orders;
}

public class Order
{
    public int Id;
    public decimal Price;
    public System.DateTime OrderTime;
}
 
 库： 
 
public class UserGroupRepository
{    
    public List<UserGroup> GetAll()
    {
        using (ISession session = FNH_Manager.OpenSession()) {
            dynamic obj = session.CreateCriteria(typeof(UserGroup)).List<UserGroup>();
            return obj;
        }
    }
}
 
 潜在的新存储库方法： 
 
public List<UserGroup> GetAll_FilterOrderDate(System.DateTime _date)
{
}

public List<UserGroup> GetAll_FilterOrderDate(List<System.DateTime> _dates)
{
}

So I will call a repository to retrieve the root object of a complex object graph, using FluentNHibernate. But for some sub-level objects I don't want to retrieve all elements, but only those where a date parameter equals certain condition. In below code, I want the lower level Order object to be filtered in this way by the OrderTime field. 
 
Meaning I want to retrieve all UserGroups, with all Users, but the Orders object of each User shall only contain orders from a specific date or date range. 
 
So what are my options on how to retrieve this object graph? I don't want lazy loading, I just want to specify a handful of different retrieval conditions, which will never change. So they can be separate functions of the repository, like suggested at the end. But how would I go about coding those methods, how to specify these conditions? 
 
Objects:
 
public class UserGroup
{
    public int Id;
    public IList<User> Users;
}

public class User
{
    public int Id;
    public string Name;
    public IList<Order> Orders;
}

public class Order
{
    public int Id;
    public decimal Price;
    public System.DateTime OrderTime;
}
 
Repository:
 
public class UserGroupRepository
{    
    public List<UserGroup> GetAll()
    {
        using (ISession session = FNH_Manager.OpenSession()) {
            dynamic obj = session.CreateCriteria(typeof(UserGroup)).List<UserGroup>();
            return obj;
        }
    }
}
 
Potential new Repository methods: ?
 
public List<UserGroup> GetAll_FilterOrderDate(System.DateTime _date)
{
}

public List<UserGroup> GetAll_FilterOrderDate(List<System.DateTime> _dates)
{
}

原文：https://stackoverflow.com/questions/7071291