本文是小编为大家收集整理的关于在mongoose中id和_id的区别是什么？的处理/解决方法，可以参考本文帮助大家快速定位并解决问题，中文翻译不准确的可切换到English标签页查看源文。
问题描述
在猫鼬中，_id和id有什么区别?哪个更好?
推荐答案
来自 documentation :
mongoose默认情况下分配每个模式一个ID虚拟getter 返回文档_id字段施放到字符串或情况下 objectids，其六角形.
因此，基本上，id getter返回文档的_id的字符串表示(默认情况下，该字符串表示为所有mongoDB文档，并且具有默认类型的ObjectId).
.关于参考更好的内容，这完全取决于上下文(即，您想要ObjectId或a string).例如，如果比较id的s，则字符串可能更好，因为ObjectId的s不会通过平等测试，除非它们是同一实例(无论它们代表什么值).
问题描述
What is the difference between _id and id in mongoose? Which is better for referencing?
推荐答案
From the documentation:
Mongoose assigns each of your schemas an id virtual getter by default which returns the documents _id field cast to a string, or in the case of ObjectIds, its hexString.
So, basically, the id getter returns a string representation of the document's _id (which is added to all MongoDB documents by default and have a default type of ObjectId).
Regarding what's better for referencing, that depends entirely on the context (i.e., do you want an ObjectId or a string). For example, if comparing id's, the string is probably better, as ObjectId's won't pass an equality test unless they are the same instance (regardless of what value they represent).
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