.net - 获取参考MongoDB驱动程序2.7.0

没错，您必须自己创建一个额外的查询。

一种方法是通过创建这样的扩展方法

public static TDocument FetchDBRefAs<TDocument>(this MongoDBRef dbRef, IMongoDatabase database)
{
     var collection = database.GetCollection<TDocument>(dbRef.CollectionName);

     var query = Builders<TDocument>.Filter.Eq("_id", dbRef.Id);
     return collection.Find(query).FirstOrDefault();
}

或异步版本

 public static async Task<TDocument> FetchDBRefAsAsync<TDocument>(this MongoDBRef dbRef, IMongoDatabase database)
 {
     var collection = database.GetCollection<TDocument>(dbRef.CollectionName);

     var query = Builders<TDocument>.Filter.Eq("_id", dbRef.Id);
     return await (await collection.FindAsync(query)).FirstOrDefaultAsync();
 }

可以这样称呼

var referencedEntity = entity.ReferencedEntity.FetchDBRefAs<T>(this.database))

实体看起来像什么

public class Entity
{
       [BsonId]
       [BsonRepresentation(BsonType.ObjectId)]
       public string Id { get; set; }
       public string RandomProperty { get; set; }
       public MongoDBRef ReferencedEntity { get; set; }    
}