Question

Novice asks mongodb to update documentation.
The data for the existing collection named user is as follows
{

name:"abc",
 people:{
 student:{
 stu_name:"YYW",
 stu_num:12345
 }
 }

}

Now I’m going to add a field named stu_sex under people.student. What kind of statement do you want to use? It’s the first time for a novice to contact mongodb. Thank you for your advice.

Answer 1

Assuming that there is only one piece of data in your collection, a feasible code is as follows

db.user.update({name: 'abc'}, {$set: {'people.student.stu_sex': 'male'}});

If your data actually has a primary key of _id, put the above

{name: 'abc'}

Replace with the corresponding selector