使用节点js +和尚+ ajax获取mongodb中集合的记录总数

Question

Total noob here, i only know how to do CRUD in Mongodb using node js+monk+ajax but I don't have any idea on how to get the total number of records in my collection.

This is what i have tried so far and it is returning undefined value:

router.get('/getTotalrecord'', function (req, res) { 
    var db = req.db; 
    var collection = db.get('department'); 
    res.send(collection.count); 
});

Answer 1

Did you look at count ? It counts how many documents answer a given query:

collection.count({})
    .then(count => res.send(count));

Answer 2

you should use this function

exports.getCount = (req, res, next) => {
  Users.find({}, { __v: 0 })
    .then(users =>
      res.status(200).json({
        status: true,
        error_num: '',
        result: users.length,
        error: ''
      })
    )
    .catch(err => {
      next(err);
    });
};