为引用MongoDB的最佳实践 [英] MongoDB best practice for referencing

问题描述

我想知道什么用引用建模的最佳实践将根据给出的局面。我使用 MongoRepository 库。

I'm wondering what the best practice for modelling by using references would be given situation under. I'm using MongoRepository library.

public class User : Entity
{
   publis string Id { get; set; }
   public string Email { get; set; }
   public string Password { get; set; }
}

public class Post : Entity
{
   public string Id { get; set; }
   public string Title { get; set; }
   public string Summary { get; set; }
   public DateTime Added { get; set; }
   public User Owner { get; set; }
}

在存储后我只想所有者（用户）对象，而不是整体的对象引用根本。

When storing the Post I want only reference to Owner (User) object instead of whole object underlying.

目前我做的这个样子，不知道的更好的方法...

Currently I'm doing it like this, not knowing of better way...

var post = new Post
{
   Title = "Example title",
   Summary = "asd asd",
   Added = DateTime.Now,
   Owner = new User { Id = "someExistingUserId" }
};
postRepository.Update(post); //Save

..

//Then to get the post
var post = postRepository.GetById("previouslySavedPostId");
post.Owner = userRepository.GetById(post.Owner.Id);
return post;

userRepository和postRepository是MongoRepository类型。

userRepository and postRepository are of MongoRepository type.

这是正确的方法来解决使用MongoDB中使用C＃我的问题/ MVC（4）？

Is this the correct approach to solving my problem using MongoDB with C#/MVC(4)?

推荐答案

您可以使用DBREF对象，而不是用户对象。

You can use DBRef object instead of User object.

    public class Post : Entity
    {
     public string Id { get; set; }
     public string Title { get; set; }
     public string Summary { get; set; }
     public DateTime Added { get; set; }
     public DBRef Owner { get; set; }
    }    

然后，您可以：

    var mongo = new Mongo(config.BuildConfiguration());
    mongo.Connect();        
    var DB = mongo.GetDatabase(_dataBaseName)

    var post = new Post();
    post.Owner = new DBRef("User", userId); //First parameter is a mongoDB collection name and second is object id
    //To fetch object referenced by DBRef you should do following
    var owner = DB.FollowReference<User>(post.Owner);

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