使用mongo C#驱动程序在嵌入式文档中维护ID属性名称 [英] Maintain Id property name in embedded doc with mongo C# driver

问题描述

我有一个mongo文档，其中包含一系列嵌入式文档.嵌入的文档具有名为"Id"的属性.

I have a mongo document that contains an array of embedded documents. The embedded documents have a property named "Id".

{ Name: "Outer object", Embedded: [ {Name: "Embedded A", Id: "5f1c591a71dc237199eeaeda"} ] }

我的C#映射对象看起来像这样(显然是一种简化)

My C# mapping objects look something like this (a simplification, obviously)

public class Outer
{
    public string Name { get; set; }
    public IEnumerable<Inner> Inners { get; set; }
}

public class Inner
{
    public string Name { get; set; }
    public string Id { get; set; }
}

当我向数据库编写外部文件时，C#驱动程序将Inner.Id属性的名称更改为_id.我如何规避此自动重命名?我尝试在Id属性上使用[BsonElement("Id")]属性，但没有帮助.

When I write an outer to the database, the C# driver changes the name of the Inner.Id property to _id. How do I circumvent this automatic rename? I've tried using the [BsonElement("Id")] attribute on the Id property, but it didn't help.

推荐答案

MongoDB文档明确指出:

MongoDB documentation explicitly states:

要求MongoDB中的文档具有唯一标识它们的键_id.

Documents in MongoDB are required to have a key, _id, which uniquely identifies them.

另一方面，C#属性通常是帕斯卡大小写的，并且不使用前缀，因此驱动程序设计器

On the other hand, C# properties are usually pascal-case and don't use prefixes so driver designers apparently decided to force mapping Id property to _id database attribute.

如果您要绑定一个非_id属性，该属性只是在MongoDB中可能被称为Id ，则可以声明另一个C#属性，其名称不是Id，因此驱动程序不会干扰它:

If you want to bind a non-_id attribute that just happens to be called Id in MongoDB, you could declare another C# property with a name other than Id so the driver doesn't interfere with it:

public class Inner
{
    public string Name { get; set; }

    [BsonElement("Id")]
    public string IdStr { get; set; }
}

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