findOneAndUpdate causing duplication problem

Question

I am having a problem in findOneAndUpdate in mongoose. The case is that i am updating a document by finding it. The query is as follows:

UserModel.findOneAndUpdate({
individualId: 'some id'
}, {
$push: {
supporterOf: 'some string'
}
})

The 'supporterOf' is the ref of UserModel and its type is 'ObjectId'.

The issue i am facing here is that, 'some string' is being pushed twice under 'supporterOf' in the document.

Can anyone tell me that how to push an array element inside the document?

Answer 1

I was having same problem, solution is.

I was keeping await like below.

 **await** schema.findOneAndUpdate(queryParms, {
                "$push": {
                    "array1": arrayDetails,
                    "array2": array2Details
                }
            }, {
                "upsert": true,
                "new": true
            },
            function (error, updateResponse) {
                if (error) {
                    throw new Error (error);
                } else {
                    // do something with updateResponse;
                }
            });

simply removing await helped me resolving this problem. Need to find the root cause. any pointer for references are welcome.