How to dynamically give the collection filed name in Meteor?

Question

I have these codes now:

OneCollection.find({}, {fields: {'oneFiled.child1': 1}});
OneCollection.find({}, {fields: {'oneFiled.child2': 1}});

But I want to give a dynamically child filed name.

let childfield = "child1";
OneCollection.find({}, {fields: {'oneFiled.childfield': 1}});  // How to write this one?

How can I dynamically give the filed name? Thanks

Answer 1

Like this ?

let childField = 'child1';
let listFields = {};
listFields['oneField.'+childField]=1;
OneCollection.find({}, {fields: listFields });

Answer 2

Use the bracket notation to construct the field object as follows:

var childfield = "child1",
    options = { fields: {} };

options["field"]["oneField."+childfield] = 1;
OneCollection.find({}, options);