Coupon's `coupon_code` gets overwritten with value of `id`

[codynguyen]

Hi,

I noticed coupon_code returned from coupon.fetch has the value of id and not of the coupon code. I think it's because coupon_code is used as the idField for the Coupon model (here).

var coupon = recurly.Coupon();
coupon.coupon_code = 'off20';

coupon.fetch(function(err, response) {
  if (err) return res.status(400).json(err);

  console.assert(response.coupon_code, 'off20'); // false
});

I think this piece is responsible. It looks like when setting id (in . inflate()), the value of id is also assigned to the idField, which is coupon_code.

[codynguyen]

A workaround I'm using is to reset the id setter:

var coupon = recurly.Coupon();
coupon.coupon_code = 'off20';

// Reset the id setter so it does not automatically assigns its value to coupon_code.
coupon.__defineSetter__('id', function() {});

coupon.fetch(function(err, response) {
  if (err) return res.status(400).json(err);

  console.assert(response.coupon_code, 'off20'); // true now
});