embedsMany relationship publishes count on swagger, but it does not exist or work

[mitsos1os]

When implementing an embedsMany relationship, the endpoints automatically created, expose a count method. Also in code, the relationName has a count property - method.

The problem is that neither of them works. This can also be verified in the official loopback-example-relations
ex:

// Customer with emails is probably id 7
Customer.findById(7)
  .then(customer => {
    return customer.emails.count()
  })
  .then(count => {
    console.log(count); // It should be 2 as created in example, but it shows 0
  })

Also issuing a GET /api/Customers/7/emails/count results with "count":0, while at the same time GET /api/Customers/7/emails/ returns a list of 2 emails

[jannyHou]

A duplidate bug as #258
To keep it easy to track, let's keep the update of fix and further discussion under that one.
I am closing this issue. Thanks for understanding :)