Use async await function with mongoose query in nodejs

Question

I tried to make async and await function in mongoose. but in one case it simply didn't work while in another case it shows syntax error.

here is my code

exports.updateDiscount= async (_id,discount) =>
{
    try
    {
        console.log(_id,discount);
        Discount.findOne({_id},(err,user) =>
        {
            if(user)
            {
              user.discountRate=parseFloat(discount);
              let saveUser= await user.save();
              if(saveUser)
              {
                  console.log("Discount saved");
                  return true
              }
            }
        })
    } catch(err)
    {
        console.log(err);
    }
}

I am using the thing function in another module


if( updateDiscount(item.userid,discount) === true)
   {
   }

const user = await Discount.findOne({_id}) ?

Anatoly
– Anatoly

2020-12-16 12:40:07 +00:00
Commented Dec 16, 2020 at 12:40 — Anatoly
– Anatoly, Commented Dec 16, 2020 at 12:40
What error exactly?

FelHa
– FelHa

2020-12-16 12:45:43 +00:00
Commented Dec 16, 2020 at 12:45 — FelHa
– FelHa, Commented Dec 16, 2020 at 12:45

Debasis Das · Accepted Answer · 2020-12-16 13:14:07Z

2

Solution ::

exports.updateDiscount= async (_id,discount) =>
{
    try
    {
        console.log(_id,discount);
        let user = await Discount.findOne({_id});
        
            if(!!user)
            {
              user.discountRate=parseFloat(discount);
              let saveUser= await user.save();
              if(!!saveUser)
              {
                  console.log("Discount saved");
                  return true
              }
            }
    } catch(err)
    {
        console.log(err);
    }
}

answered Dec 16, 2020 at 13:14

Debasis Das

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Comments

fullstack · Accepted Answer · 2020-12-16 12:47:45Z

1

you need to await the function

const answer = await updateDiscount(item.userid,discount);
if(answer) {
}

answered Dec 16, 2020 at 12:47

fullstack

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