mongoose insertone code example

Example 1: mongodb js get id of inserted

collection.insert(objToInsert, function (err, result){
    if(err)console.log(err);
    else {
        console.log(result["ops"][0]["_id"]);
        // The above statement will output the id of the 
        // inserted object
       }
});

Example 2: deleteOne mongoose

Tank.deleteOne({ size: 'large' }, function (err) {
  if (err) return handleError(err);
  // deleted at most one tank document
});