I've been attempting to access a specific field returned from the mongodb collection.find method without success. The console.log is not displaying anything.
router.get('/buildings', function(req, res, next) {
var db = req.db;
var collection = db.get('buildings');
collection.find({buildingNO:"1"},{},function(e,docs){
var x=docs[0].price;
console.log(x);
});
});
Note: I'm using monk middle-ware instead of native mongodb
Thank you!
Make sure to verify the error argument in the callback and ensure your return value is:
x=docs[0]...
Don't forget, it should not be:
x=doc[0]
It's quite surprising that you're not encountering an undefined variable error.
Utilizing the projection feature in Node.js can be very helpful.
When using projection, you provide an empty object {} as the second parameter to project all attributes.
For instance:
By projecting an object like this:
{
_id:false // or 0
}
You will exclude the _id attribute.
In this case, we are specifying to only retrieve price:
collection.find({buildingNO:"1"}, {price:1}, function(e, docs){
var x = docs[0].price;
console.log(x);
});
If you notice a typo on doc[0], it should actually be docs.
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