How to resolve await issue in nodejs

Question

Here i am trying to get latest record key p_id value from mongodb collection but i am getting error like :SyntaxError: await is only valid in async function. So how to resolve this issue?

data.controller.js:

module.exports.getData = (req, res, next) => {
 var Product = mongoose.model(req.query.collectionname);
 const getid = await Product.findOne({ p_id: -1 }).limit(1)
 console.log(getid.p_id) 
}

...make it an async function? – jonrsharpe May 17 '20 at 07:24 — jonrsharpe, May 17 '20 at 07:24

score 2 · Answer 1 · answered May 17 '20 at 07:26

2

You need to make this function as an async function by putting async keyword in front of your function like bellow.

module.exports.getData = async(req, res, next) => {
 var Product = mongoose.model(req.query.collectionname);
 const getid = await Product.findOne({ p_id: -1 }).limit(1)
 console.log(getid.p_id) 
}

answered May 17 '20 at 07:26

Kasunaz

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5
17

Error: (node:12080) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'p_id' of null – Kavitha K May 17 '20 at 07:40
Could you please check printing `getid` object. is there any value returning from there. – Kasunaz May 17 '20 at 07:45
Do await with in the try... catch...and print thr getId value – Ranjith U K May 17 '20 at 07:45
Getting console.log(getid) is null – Kavitha K May 17 '20 at 07:49
Yeah @RanjithUk it's good practice to follow. it will through any error occurred where the function in runtime. – Kasunaz May 17 '20 at 07:49
null means there is no data found according to your query. – Kasunaz May 17 '20 at 07:50
@Kavitha K do you have product with p_id -1? – Ranjith U K May 17 '20 at 07:52
@RanjithUk: I have p_id in my collection – Kavitha K May 17 '20 at 08:03
Do you have product record with p_id is -1 – Ranjith U K May 17 '20 at 09:17

How to resolve await issue in nodejs

1 Answers1