如何使用官方的MongoDB C#驱动程序将BsonDocument转换为强类型对象? [英] How to convert a BsonDocument into a strongly typed object with the official MongoDB C# driver?

问题描述

出于单元测试的目的，我想测试类映射，而无需将文档写入MongoDB数据库中.为了处理特殊情况，例如循环的父/子引用和只读属性，我使用了BsoncClassMap.RegisterClassMap< MyType>(...)和一些自定义映射，这些自定义映射覆盖了默认的AutoMap();生成的映射.

For unit testing purposes, I'd like to test my class mappings without reading and writing documents into the MongoDB database. To handle special cases such as circular parent / child references and read only properties, I've used BsoncClassMap.RegisterClassMap< MyType>(...) with some custom mappings overriding the default AutoMap(); generated mappings.

有人知道如何在不往返数据库的情况下将BsonDocument转换为所需的强类型对象吗?在往返数据存储区时，驱动程序正在执行此操作.我的目标是使用与MongoDB C#驱动程序内部使用的逻辑相同，以测试从C#域对象到BsonDocument的序列化.

Does anyone know how to convert a BsonDocument into the desired strongly typed object without making a round trip to the database? The driver is doing this when going to and from the data store. My goal would be to use the same logic that the MongoDB C# driver is using internally to test the serialization to / from a C# domain object into a BsonDocument.

我能够使用Bson扩展方法ToBsonDocument()将C#对象转换为BsonDocument?我所缺少的是与过程相反的过程-本质上是BsonDocument.ToObject< MyType>();.

I'm able to use the Bson extension method ToBsonDocument() to convert a C# object into a BsonDocument? The piece that I'm lacking is the reverse of the process - essentially a BsonDocument.ToObject< MyType>();.

最新版本的官方MongoDB C#驱动程序是否有可能?似乎应该-我想知道我是否只是盲目而错过了明显的事物.

Is this possible with the latest version of the official MongoDB C# driver? It seems like it should be - I'm wondering if I'm just blind and am missing the obvious.

推荐答案

MongoDB驱动程序确实提供了一种从Bson反序列化为您的类型的方法.可以在MongoDB.Bson.dll命名空间中的MongoDB.Bson.dll中找到BsonSerializer.

The MongoDB Driver does provide a method for deserializing from Bson to your type. The BsonSerializer can be found in MongoDB.Bson.dll, in the MongoDB.Bson.Serialization namespace.

您可以使用BsonSerializer.Deserialize<T>()方法.一些示例代码将是

You can use the BsonSerializer.Deserialize<T>() method. Some example code would be

var obj = new MyClass { MyVersion = new Version(1,0,0,0) };
var bsonObject = obj.ToBsonDocument();
var myObj = BsonSerializer.Deserialize<MyClass>(bsonObject);
Console.WriteLine(myObj);

其中MyClass定义为

public class MyClass
{
    public Version MyVersion {get; set;}
}

我希望这会有所帮助.

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