插入子文档与MongoDB中

Question

我有收集以下文件：

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

我怎样才能插入“小部件” {id: "1", blabla: "blabla"}的“姓名” 3？

Answer 1

相较于先前的回答只是插入到一切文件的根，这里是要做到这一点with positional operator一个正确的方法：

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