Assume I have the following function:
Person.find({ surname: "Doe" }).only("name", "surname").run(function (err, people) {
});
This is what I have tried using promises:
Q.nfcall(Person.find.only('name', 'surname').run, {surname: 'Doe'});
Where should I insert arguments for the only() function using promises?
Thank you
First of all, if you're using Node.js 0.12+ or io.js, you don't need to use Q or other libraries to support promises, as they're available natively.
Second, it seems like you're using Mongoose, which support promises natively: http://mongoosejs.com/docs/harmony.html
When you call Model.find(), it returns a promise already, so you can just do:
var promise = Person.find({ surname: "Doe" }).only("name", "surname")
promise.then(...)
The arguments for only should go where they always went, just as well as those to find. It's only run that you want to call with a callback and get a promise out:
Q.nfcall(Person.find({ surname: "Doe" }).only("name", "surname").run)
.then(function(people){…}, function(err) {…});
But probably you'll have to use Q.ninvoke anyway:
Q.ninvoke(Person.find({ surname: "Doe" }).only("name", "surname"), "run")
.then(function(people){…}, function(err) {…});
Person.findfrom?