handler.js

gistfile1.txt

export default (req, res) => {
  const {
    WishlistPlaces,
  } = req.app.models;

  const placeId = req.body.placeId;
  console.log('******************************************');
  console.log(placeId);

  WishlistPlaces.findOrCreate({
    where: { userId: 1},
    defaults: {
      placeId: placeId
    }
  })
  .spread((wishlist_places, created) => {
    console.log(wishlist_places.get({
      plain: true
    }))
    console.log(created)
  })
  .then((index) => {
    res.status(200).send({
      index,
    });
  })
  .catch((error) => {
    res.status(500).send({
      errors: [error],
    });
  });
};

Replace with

.spread((wishlistPlaces, created) => {
  return wishlistPlaces[0];
})

In your defaults also add

defaults: {
  placeId: placeId,
  deletedAt: null
}