mongodb / javascript variable in query

Question

i have:

var optiontable = {1: 'attack', 2: 'defence', 3: 'intelligence'};
    var option = 1;
    var minion = minions[thisminion]; // get correct, works.
    console.log(optiontable[option]); // would output "attack"
    var nameoption = optiontable[option];
var increasement = 8;

how would i do to get the minion.attack based on:

thisminion.nameoption  // this wont work when it should display the result of thisminion.attack

and get the nameoption to use in:

      minions.update({
                    _id: thisminion._id,
                    userid: playerid
                }, {$inc: {nameoption: increasement}})

Community · Accepted Answer · 2017-05-23 12:08:29Z

1

Hard to tell without looking at the rest of the code, but looks like you just need to change

thisminion.nameoption

to

thisminion[nameoption]

Since your original line is trying to access thisminion's property called 'nameoption'. Using square brackets would access the property named the same as the value of nameoption.

As for the mongo part: since you can't use a variable as left-hand value, you need to do a little bit of extra work:

var updateObj = {};
updateObj[nameoption] = increasement;

then you can do this:

 minions.update({
                    _id: thisminion._id,
                    userid: playerid
                }, {$inc: updateObj})

2 Comments

maria Over a year ago

but thisminion.attack is the correct one. i need it to work with the variable.

Maksym Over a year ago

I have updated my answer after re-reading your question. Sorry for that.

Collectives™ on Stack Overflow

mongodb / javascript variable in query

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related