Question

db.tasks.find({user:”saturngod”});

is return

{ "_id" : ObjectId("4de20ef97065cc77c80541fd"),
 "todo" : [
    {
        "id" : 1,
        "desc" : "hi",
        "done" : 0
    },
    {
        "id" : 2,
        "desc" : "hello",
        "done" : 0
    }
], "user" : "saturngod" }

I want to update done = 1 when todo.id=1

So, I wrote

>db.tasks.update({'todo.id':1},{"$set":{todo:{done:1}}});

I lost all todo and only set done : 1

db.tasks.find();

{ "_id" : ObjectId("4de20ef97065cc77c80541fd"), "todo" : { "done" : 1 }, "user" : "saturngod" }

How to update the value ? I want to do like this

{ "_id" : ObjectId("4de20ef97065cc77c80541fd"),
 "todo" : [
    {
        "id" : 1,
        "desc" : "hi",
        "done" : 1
    },
    {
        "id" : 2,
        "desc" : "hello",
        "done" : 0
    }
], "user" : "saturngod" }

Answer 1

got it.

db.tasks.update({'todo.id':1},{"$set":{"todo.$.done":1}});