更新父子数据nodejs mongodb

我是在与nodejs.mongodb新我想更新评论data.Here是我的文档

{ "__v": NumberInt(0), "_id": ObjectId("565443b1172e19d51f98b0ed"), "address": "tohana", "comments": [ { "_id": ObjectId("5654455fe088d89c20736e3c"), "comment": "good man", "uemail": "[e-mail]", "uname": "dinesh" }, { "_id": ObjectId("565445e471dce6ca20705a84"), "comment": "nice person", "uemail": "[e-mail]", "uname": "krishan" }, { "_id": ObjectId("5654460e7aa73bec2064060e"), "comment": "bad person", "uemail": "Rai", "uname": "Rahul" } ], "email": "[e-mail]"▼, "name": "Nishant" } 

我在前端和nodeJs中使用Angular js作为后端。 这是我的代码：

 app.post('/commentsSave/:id', function(req, res) { var id = req.params.id; // userId var input = JSON.parse(JSON.stringify(req.body)); //commentData var commentId = input.id; //commentId var name = input.name; var email = input.email; var comment = input.comment res.send({data:id,data2:input}); }) 

Answer 1

 app.post('/commentsSave/:id', function(req, res) { var id = req.params.id; // userId var input = JSON.parse(JSON.stringify(req.body)); //commentData var commentId = input.id; //commentId var name = input.name; var email = input.email; var comment = input.comment Users.update({'comments._id': input.id}, { $set: { 'comments.$.name': name, 'comments.$.email': email, 'comments.$.comment': comment } },function(error, result){ if(error){ console.log(error); } else{ console.log(result); } }) }