booking.js

this.post(`${config.bookingApi}/ManageBooking/GetBooking`, booked, {
          dataTransformer: ({data}) => {
            console.log('transformer.data.response', data);
            let customer = {
              id: 1,
              ...data.bookerProfile,
              ...data.bookerProfile.address,
              email: data.bookerProfile.email.address,
              mobilePhone: data.bookerProfile.phone.countryCode.concat(' ', data.bookerProfile.phone.number)
            };

            let checkout = [];
            let totalPrices = [];
            data.accommodationBooking.roomConfigurations.forEach((room, i) => {
              let checkoutItem = {
                ...room,
                configurationId: i + 1,
                guests: room.paxes.map((pax) => {
                  return {
                    id: i + 1,
                    ...pax,
                    ...pax.customer,
                    type: pax.ageGroupTypeID,
                  }
                }),
                specialWishes: room.specialRequests
              };
              totalPrices.push(room.totalPrice);
              checkout.push(checkoutItem);
            });

            return {
              customer: customer,
              checkout: checkout,
              totalPrices: totalPrices,
              voucher: {id: 1, quantity: 100}
            };
          },
          persistBy: 'insertOrUpdate'
        })