在MongoDB 隐藏ID字段

2026-06-04 1 花语

让我们创建一个包含文档的集合-> db.demo575.insertOne({id:101,Information:{Name:"Chris",Age:21}});{ "acknowledged" : true, "insertedId" : ObjectId("5e916a55581e9acd78b427f7") } > db.demo575.insertOne({id:102,Information:{Name:"David",Age:20}});{ "acknowledged" : true, "insertedId" : ObjectId("5e916a5f581e9acd78b427f8") } > db.demo575.insertOne({id:101,Information:{Name:"Bob",Age:23}});{ "acknowledged" : true, "insertedId" : ObjectId("5e916a67581e9acd78b427f9") }

在find()方法的帮助下显示集合中的所有文档-

> db.demo575.find();

这将产生以下输出-

{ "_id" : ObjectId("5e916a55581e9acd78b427f7"), "id" : 101, "Information" : { "Name" : "Chris", "Age" : 21 } } { "_id" : ObjectId("5e916a5f581e9acd78b427f8"), "id" : 102, "Information" : { "Name" : "David", "Age" : 20 } } { "_id" : ObjectId("5e916a67581e9acd78b427f9"), "id" : 101, "Information" : { "Name" : "Bob", "Age" : 23 } }

以下是隐藏id字段值并显示rest的查询-

> db.demo575.find({id:101},{"Information.Name":1});

这将产生以下输出-

{ "_id" : ObjectId("5e916a55581e9acd78b427f7"), "Information" : { "Name" : "Chris" } } { "_id" : ObjectId("5e916a67581e9acd78b427f9"), "Information" : { "Name" : "Bob" } }