express - How to update a specific object in a array of objects in Node.js and Mongoose -

i new node.js coming java experience. have situation trying wrap head around. stack express.js, mongoose, ejs template. here scenario: have schema:

var userschema = mongoose.schema({ name: {     type: string,     index: true }, password: {     type: string,     select: false }, email: {     type: string }, academic: [{     qualification: string,     institute: string,     from: string,     to: string,     about: string }] 

});

there list of academics. want update 1 academic object in list. how go this?

router.post('/academic/schools/update', function (req, res) { 

});

i pass values ejs template route , getting values in req.body. how in node , mongoose query specific object in route , updates values. have thought maybe adding id academic object able keep track of update.

each academic sub document have _id after save. there 2 ways can it. if pass id of user , id of academic sub-doc id in url or request body, can update this:

user.findbyid(userid).then(user => {     let academic = user.academic.id(academicid);     academic.qualification = 'something';     return user.save(); }); 

if pass id of academic sub-doc, can this:

user.findone({'academic._id': academicid}).then(user => {     let academic = user.academic.id(academicid);     academic.qualification = 'something';     return user.save(); }); 

note sub document array return mongoose mongoosearray instead of native array data type. can manipulate them using .id .push .pop .remove method http://mongoosejs.com/docs/subdocs.html