Spring JPA - A different object with the same identifier value was already - spring

Question

I have 3 classes :
#Entity
public class Purchase {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id ;
private String description ;
private float discount ; //percentage
private boolean status ; // paid or not
#ManyToOne
#JoinColumn(name = "company_id")
#JsonIgnore
private Company company ;
#ManyToOne
#JoinColumn(name = "BusinnesPartner_id")
#JsonIgnore
private BusineesPartner busineesPartner ;
#OneToMany(mappedBy = "purchase", cascade = CascadeType.ALL, orphanRemoval = true)
private Set<PurchaseItem> purchaseItems;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public float getDiscount() {
return discount;
}
public void setDiscount(float discount) {
this.discount = discount;
}
public boolean isStatus() {
return status;
}
public void setStatus(boolean status) {
this.status = status;
}
public Company getCompany() {
return company;
}
public void setCompany(Company company) {
this.company = company;
}
public BusineesPartner getBusineesPartner() {
return busineesPartner;
}
public void setBusineesPartner(BusineesPartner busineesPartner) {
this.busineesPartner = busineesPartner;
}
public Set<PurchaseItem> getPurchaseItems() {
return purchaseItems;
}
public void setPurchaseItems(Set<PurchaseItem> purchaseItems) {
this.purchaseItems = purchaseItems;
}
public Purchase() {
super();
// TODO Auto-generated constructor stub
}
#Override
public String toString() {
return "Purchase [id=" + id + ", description=" + description + ", discount=" + discount + ", status=" + status
+ ", company=" + company + ", busineesPartner=" + busineesPartner + ", purchaseItems=" + purchaseItems
+ "]";
}
}
And item :
#Entity
public class Item {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id ;
private String name ;
private String brand ;
private String category ;
private Double unitPrice ;
private Double weight ;
private String manufacturer ;
private String description ;
#ManyToOne
#JoinColumn(name = "company_id")
private Company company ;
#OneToMany(mappedBy = "item")
private Set<ItemInventory> itemInventories;
#OneToMany(mappedBy = "item")
private Set<PurchaseItem> purchaseItems;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getBrand() {
return brand;
}
public void setBrand(String brand) {
this.brand = brand;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public Double getUnitPrice() {
return unitPrice;
}
public void setUnitPrice(Double unitPrice) {
this.unitPrice = unitPrice;
}
public Double getWeight() {
return weight;
}
public void setWeight(Double weight) {
this.weight = weight;
}
public String getManufacturer() {
return manufacturer;
}
public void setManufacturer(String manufacturer) {
this.manufacturer = manufacturer;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Set<ItemInventory> getItemInventories() {
return itemInventories;
}
public void setItemInventories(Set<ItemInventory> itemInventories) {
this.itemInventories = itemInventories;
}
#Override
public String toString() {
return "Item [id=" + id + "]";
}
public Company getCompany() {
return company;
}
public void setCompany(Company company) {
this.company = company;
}
public Set<PurchaseItem> getPurchaseItems() {
return purchaseItems;
}
public void setPurchaseItem(Set<PurchaseItem> purchaseItems) {
this.purchaseItems = purchaseItems;
}
public Item(Integer id, String name, String brand, String category, Double unitPrice, Double weight,
String manufacturer, String description, Company company, Set<ItemInventory> itemInventories,
Set<PurchaseItem> purchaseItems) {
super();
this.id = id;
this.name = name;
this.brand = brand;
this.category = category;
this.unitPrice = unitPrice;
this.weight = weight;
this.manufacturer = manufacturer;
this.description = description;
this.company = company;
this.itemInventories = itemInventories;
this.purchaseItems = purchaseItems;
}
public Item() {
}
}
And PurchaseItem :
#Entity
#Table(name = "purchase_item")
public class PurchaseItem implements Serializable {
#Id
#ManyToOne
#JoinColumn(name = "item_id")
private Item item ;
#Id
#ManyToOne
#JoinColumn(name = "purchase_id")
private Purchase purchase ;
private Long quantity ;
public Item getItem() {
return item;
}
public void setItem(Item item) {
this.item = item;
}
public Purchase getPurchase() {
return purchase;
}
public void setPurchase(Purchase purchase) {
this.purchase = purchase;
}
public Long getQuantity() {
return quantity;
}
public void setQuantity(Long quantity) {
this.quantity = quantity;
}
public PurchaseItem(Item item, Purchase purchase, Long quantity) {
super();
this.item = item;
this.purchase = purchase;
this.quantity = quantity;
}
public PurchaseItem() {
super();
// TODO Auto-generated constructor stub
}
#Override
public String toString() {
return "PurchaseItem [item=" + item + ", purchase=" + purchase + ", quantity=" + quantity + "]";
}
}
And here is my controller :
#RestController
public class PurchaseController {
#Autowired
private ItemRepository itemRepos ;
#Autowired
private InventoryRepository inventoryRepos ;
#Autowired
private CompanyRepository companyRepos ;
#Autowired
private PurchaseRepository purchaseRepos ;
#RequestMapping(value = "purchase/add/{company}", method = RequestMethod.POST)
public Object addItem(#RequestBody Purchase purchase) {
Purchase newPurchase = new Purchase() ;
newPurchase.setDiscount(purchase.getDiscount());
newPurchase.setStatus(purchase.isStatus());
newPurchase.setBusineesPartner(purchase.getBusineesPartner()) ;
newPurchase.setDescription(purchase.getDescription()) ;
newPurchase.setPurchaseItems(new HashSet<PurchaseItem>());
newPurchase = purchaseRepos.save(newPurchase) ;
for(PurchaseItem curentPurchaseItem : purchase.getPurchaseItems()) {
Item item = itemRepos.findOne(curentPurchaseItem.getItem().getId()) ;
curentPurchaseItem.setPurchase(newPurchase);
curentPurchaseItem.setItem(item);
newPurchase.getPurchaseItems().add(curentPurchaseItem) ;
}
return purchaseRepos.save(newPurchase) ;
}
}
Here is the error Stack :
A different object with the same identifier value was already
associated with the session :
[com.inconso.models.PurchaseItem#PurchaseItem [item=null,
purchase=null, quantity=25]]; nested exception is
javax.persistence.EntityExistsException: A different object with the
same identifier value was already associated with the session :
[com.inconso.models.PurchaseItem#PurchaseItem [item=null,
purchase=null, quantity=25]]