Persisting data with JPA with existing datas - spring-boot

Question

I want to persist an object like this one :
{
"paymentMode": "CREDIT CARD",
"totalAmount": 158.0,
"orderProducts": [
{
"productKeyId": "HycaR7sPeecIMZEewanuK0jzPo7S33",
"name": "Cornish crab salad, brown crab mayonnaise, toasted muffin",
"price": 20.0,
"qty": 1,
"imgPath": "pathImage",
"category": {
"categoryKeyId": "23ume70Fu6yqyGUWfQkW110P4ko3gZ",
"name": "Starter"
}
},...
],
"seller": {
"userKeyId": "qmNR5g2TD8Ja5KvA1DCQWzYj55nvbP",
"firstName": "David",
"lastName": "Vera",
"email": "david.vera#9online.fr",
"addresses": [
{
"addressKeyId": "2t7x0bFgP5B9Qb2ymnLL5aPZVwMFhJ",
"city": "Vancouver",
"country": "Canada",
"streetName": "123 street name",
"postalCode": "ABCCBA",
"type": "billing",
},...
]
},
"createdAt": "2019-10-22T09:48:06.000+0000"
}
Some object are already stored in Database such as seller, addresses, products and product category.
I created : Orders tables
#Entity
#Table(name="orders")
#Getter #Setter
public class OrderEntity implements Serializable {
#Getter(AccessLevel.NONE)
#Setter(AccessLevel.NONE)
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy= GenerationType.IDENTITY)
private Long id;
#Column(nullable = false, unique = true)
private String orderKeyId;
// A sale belong to one seller
#ManyToOne(fetch = FetchType.LAZY)
private UserEntity seller;
private String paymentMode;
private double totalAmount;
#OneToMany(mappedBy = "pk.order")
#Valid
private List<OrderProductEntity> orderProducts;
}
An order_product table (pivot table):
#Entity
#Table(name="order_product")
#Getter #Setter
public class OrderProductEntity {
#EmbeddedId
#JsonIgnore
private OrderProductPK pk;
#Column(nullable = false)
private Integer qty;
// default constructor
public OrderProductEntity() {
super();
}
public OrderProductEntity(OrderEntity order, ProductEntity product, Integer quantity) {
pk = new OrderProductPK();
pk.setOrder(order);
pk.setProduct(product);
this.qty = quantity;
}
#Transient
public ProductEntity getProduct() {
return this.pk.getProduct();
}
...
}
And a product table
#Entity
#Table(name="products")
#Getter #Setter
public class ProductEntity implements Serializable {
#Getter(AccessLevel.NONE)
#Setter(AccessLevel.NONE)
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy= GenerationType.IDENTITY)
private Long id;
#Column(nullable = false)
private String productKeyId;
// many to one relationship with category
#ManyToOne
#JoinColumn(name = "category_id")
private CategoryEntity category;
#Column(nullable = false)
private String name;
#Column(nullable = false)
private double price;
#Column(nullable = false)
private int qty;
private String imgPath;
#JsonManagedReference
#OneToMany(mappedBy = "pk.product", fetch = FetchType.EAGER)
#Valid
private List<OrderProductEntity> orderProducts;
}
The userEntity class :
#Entity
#Table(name = "users")
#Getter #Setter
public class UserEntity implements Serializable {
#Getter(AccessLevel.NONE)
#Setter(AccessLevel.NONE)
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy= GenerationType.IDENTITY)
private Long id;
#Column(nullable = false, unique = true)
private String userKeyId;
#Column(nullable = false, length = 50)
private String firstName;
#Column(nullable = false, length = 50)
private String lastName;
#Column(nullable = false, length = 120, unique = true)
private String email;
#Column(nullable = false)
private String encryptedPassword;
private String emailVerificationToken;
// column definition do not work for all database engine. So set the value to false is the same
// #Column(nullable = false, columnDefinition = "boolean default false")
#Column(nullable = false)
private Boolean emailVerificationStatus = false;
// One user can have Many Addresses
#OneToMany(mappedBy = "userDetails", cascade = CascadeType.ALL, fetch = FetchType.LAZY)
#JsonManagedReference
private List<AddressEntity> addresses;
}
And finally the embedded class :
#Embeddable
#Getter #Setter
#ToString
public class OrderProductPK implements Serializable {
private static final long serialVersionUID = 476151177562655457L;
#ManyToOne(optional = false, fetch = FetchType.LAZY)
#JoinColumn(name = "order_id")
private OrderEntity order;
#ManyToOne(optional = false, fetch = FetchType.LAZY)
#JoinColumn(name = "product_id")
private ProductEntity product;
...
}
I created a controller method to persist orders in a MySQL database:
public OrderRest createOrder(#RequestBody OrderRequestModel orderRequestModel) throws Exception {
OrderRest returnValue = new OrderRest();
ModelMapper modelMapper = new ModelMapper();
OrderDto orderDto = modelMapper.map(orderRequestModel, OrderDto.class);
OrderDto createdOrder = orderService.createOrder(orderDto);
returnValue = modelMapper.map(createdOrder, OrderRest.class);
// 5. Return the expected object
return returnValue;
}
I have an orderDTO object that contains several fields (including ID).
public class OrderDto implements Serializable {
#Getter(AccessLevel.NONE)
#Setter(AccessLevel.NONE)
private static final long serialVersionUID = 1L;
private Long id;
private String orderKeyId;
private String paymentMode;
private double totalAmount;
private List<ProductDto> orderProducts;
private UserDto seller;
private Date createdAt;
}
My productDTO object
public class ProductDto implements Serializable {
// ommit this member and do not generate getter / setter
#Getter(AccessLevel.NONE)
#Setter(AccessLevel.NONE)
private static final long serialVersionUID = 1L;
private Long id;
private String productKeyId;
private String name;
private double price;
private int qty;
private String imgPath;
private CategoryDto category = new CategoryDto();
}
The UserDto :
#Getter #Setter
#ToString
public class UserDto implements Serializable {
// ommit this member and do not generate getter / setter
#Getter(AccessLevel.NONE)
#Setter(AccessLevel.NONE)
private static final long serialVersionUID = 1L;
private long id;
private String userKeyId;
private String firstName;
private String lastName;
private String email;
private String password;
private String encryptedPassword;
private String emailVerificationToken;
private Boolean emailVerificationStatus = false;
private List<AddressDto> addresses;
// private List<RoleDto> roles;
}
the controller is calling my service layer :
#Override
public OrderDto createOrder(OrderDto orderDto) {
// create a new order
ModelMapper modelMapper = new ModelMapper();
OrderEntity orderEntity = modelMapper.map(orderDto, OrderEntity.class);
String orderKeyId = utils.generateOrderKeyId(30);
orderEntity.setOrderKeyId(orderKeyId);
orderEntity.setCreatedAt(orderDto.getCreatedAt());
orderEntity.setPaymentMode(orderDto.getPaymentMode());
orderEntity.setTotalAmount(orderDto.getTotalAmount());
// set the seller
UserEntity userEntity = modelMapper.map(orderDto.getSeller(), UserEntity.class);
orderEntity.setSeller(userEntity);
List<OrderProductEntity> orderProductEntities = new ArrayList<>();
// set the products
for (int i = 0; i < orderDto.getOrderProducts().size(); i++) {
ProductDto productDto = orderDto.getOrderProducts().get(i);
OrderProductEntity orderProductEntity = modelMapper.map(orderDto.getOrderProducts().get(i), OrderProductEntity.class);
orderProductEntities.add(orderProductEntity);
orderDto.getOrderProducts().set(i, productDto);
}
orderEntity.setOrderProducts(orderProductEntities);
OrderEntity storedOrder = orderRepository.save(orderEntity);
OrderDto returnValue = modelMapper.map(storedOrder, OrderDto.class);
return returnValue;
}
I have 3 issues :
I save the order in the database but the seller is not persisted
In the order product table datas are not persisted.
And i obtain an error message in my rest response :
"trace": "org.modelmapper.MappingException: ModelMapper mapping errors: Converter org.modelmapper.internal.converter.CollectionConverter#685b36d6 failed to convert java.util.List to java.util.List.error...