cannot remove a document

[alexwang2013]

   var ObjectID = req.ObjectID;
    db.collection('prodcuts').remove({_id:ObjectID(productId)}, {safe: true}, function(err, result) {
        console.log(err);
        console.log(result);
        res.send((err === null) ? { msg: '' } : { msg: err });
    });

it output err is null, result is 0, but the document in DB cannot be removed.

and i tried the following, it has the same result. but the document in DB cannot be removed.

  db.collection('prodcuts').remove({name:'bmw')}, {safe: true}, function(err, result) {
        console.log(err);
        console.log(result);
        res.send((err === null) ? { msg: '' } : { msg: err });
    });

anybody could help me for this issue?

Regards

[vkarpov15]

Can you run this command in the mongodb shell successfully? That is, does db.products.remove({ name: 'bmw' }); work?

Also, you may not have noticed but you have a typo in your code, "prodcuts" -> "products"

[alexwang2013]

Hi, vkarpov15
Thank you so much. I made a mistake on the spell. it should be "prodcuts" -> "products".
All the statements works fine.
Thank you very much. you solved a problem for me that it took me more than 8 hours :)

Alex