So I'm trying to insert a new field into MongoDB, and whilst it will accept my Javascript variable as data, it won't accept it as a new field name:
function appendInformation(question, answer) {
Sessions.update({ _id: Id }, { question : answer });
}
It inserts the correct answer, but is listed in the doc as question: {answer} not {question} : {answer}
You need to use $set to update the Session document with a new field.
function appendInformation(question, answer) {
var qa = { };
qa[question] = answer;
Sessions.update({ _id: Id }, { $set : qa });
}
$set documentation
> db.so.remove()
> var qa={"question 1" : "the answer is 1"};
> db.so.insert(qa);
> db.so.find()
{ "_id" : ObjectId("520136af3c5438af60de6398"),
"question 1" : "the answer is 1" }
> var qa2={"question 2" : "the answer is 2"};
> db.so.update({ "_id" : ObjectId("520136af3c5438af60de6398")}, { $set : qa2 })
> db.so.find()
{ "_id" : ObjectId("520136af3c5438af60de6398"),
"question 1" : "the answer is 1",
"question 2" : "the answer is 2" }
