Hyperledger fabric composer transaction not working - hyperledger-fabric

Question

I'm trying add this transaction named placeOrder i want to add a Customer participant
before creating Order asset and map its relationship with the Order asset while processing this transaction. But I'm getting customer not defined error. Can anybody help? Thanks.
My models
namespace org.isn.customer
participant Customer identified by email {
o String firstName
o String lastName
o String email
o String password
}
enum Status{
o ACTIVE
o OFF_THE_ROAD
}
asset Vehicle identified by serial {
o String brand
o String model
o String color
o Status status
o Double price
o String serial
}
asset Order identified by orderId{
o String orderId
o Vehicle item
--> Customer customer
}
transaction PlaceOrder {
o String orderId
--> Vehicle item
o Customer customer
}
script.js
/**
* #param {org.isn.shop.PlaceOrder}orderRequest
* #transaction
*/
async function placeOrder(orderRequest){
const factory = getFactory();
const customerRegistry = await getParticipantRegistry("org.isn.customer.Customer");
const customerExists = await customerRegistry.exists(orderRequest.customer.email);
if(!customerExists){
const customer = factory.newResource("org.isn.customer","Customer",orderRequest.customer.email);
customer.firstName = orderRequest.customer.firstName;
customer.lastName = orderRequest.customer.lastName;
customer.email = orderRequest.customer.email;
customer.password = orderRequest.customer.password;
await customerRegistry.add(customer);
}else{
const customer = await customerRegistry.get(orderRequest.customer.email);
}
const order = await factory.newResource("org.isn.shop","Order",orderRequest.orderId);
order.customer = customer.getIdentifier();
order.item = orderRequest.item;
const orderRegistry = await getAssetRegistry("org.isn.shop.Order");
await orderRegistry.add(order);
const PlaceOrderEvent = factory.newEvent("org.isn.shop","PlaceOrderEvent");
placeOrderEvent.order = order;
emit(placeOrderEvent);
}

Answer 1

o Customer customer needs to become --> Customer customer then you will be able to reference orderRequest.customer.firstName etc also not sure you need order.customer = customer.getIdentifier(); might need to become order.customer.email = customer.getIdentifier();

Answer 2

The following version of the Model and the JS will work for a new and existing customer:
namespace org.isn.customer
participant Customer identified by email {
o String firstName
o String lastName
o String email
o String password
}
enum Status{
o ACTIVE
o OFF_THE_ROAD
}
asset Vehicle identified by serial {
o String brand
o String model
o String color
o Status status
o Double price
o String serial
}
asset Order identified by orderId{
o String orderId
--> Vehicle item
--> Customer customer
}
transaction PlaceOrder {
o String orderId
--> Vehicle item
o Customer customer
}
/**
* #param {org.isn.customer.PlaceOrder}orderRequest
* #transaction
*/
async function placeOrder(orderRequest){
const factory = getFactory();
const customerRegistry = await getParticipantRegistry("org.isn.customer.Customer");
const customerExists = await customerRegistry.exists(orderRequest.customer.email);
if(!customerExists){
var customer = factory.newResource("org.isn.customer","Customer",orderRequest.customer.email);
customer.firstName = orderRequest.customer.firstName;
customer.lastName = orderRequest.customer.lastName;
customer.email = orderRequest.customer.email;
customer.password = orderRequest.customer.password;
await customerRegistry.add(customer);
}else{
var customer = await customerRegistry.get(orderRequest.customer.email);
}
const order = await factory.newResource("org.isn.customer","Order",orderRequest.orderId);
order.customer = factory.newRelationship("org.isn.customer","Customer",customer.getIdentifier());
order.item = orderRequest.item;
const orderRegistry = await getAssetRegistry("org.isn.customer.Order");
await orderRegistry.add(order);
}
Please note the following:
In the Order asset I have changed the o Vehicle to be --> Vehicle item to match up with the Transaction.
I have also used var customer in both the if and else code.
(To make mine work I had to use the same namespace, but perhaps you had separate .cto files)