javascript - 使用 mongoDB 插入子文档

Question

我的收藏中有以下文档:

"_id" : "2",
"workspace" : [{
        "name" : "1",
        "widgets" : [ ]
    },{
        "name" : "2",
        "widgets" : [ ]
    },{
        "name" : "3",
        "widgets" : [ ]
    },{
        "name" : "4",
        "widgets" : [ ]
    }
]}

如何在“小部件”中为“名称”3 插入 {id: "1", blabla: "blabla"}？

Answer 1

与之前只将所有内容插入文档根目录的答案相比，这是执行此操作的正确方法with positional operator :

db.t.update({
 "_id" : "2",
 "workspace.name" : "3"
},{
 $push: {
   'workspace.$.widgets' : {
       id: "2",
       blabla: "blabla"
   }
 }
});