0

弹簧靴 2.5

@Entity
public class Orders {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;
    @NotNull
    @OneToMany(mappedBy = "orders", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    private Set<ProductEntry> productEntities = new HashSet<>();


@Entity
public class Cart {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;
    @OneToMany(mappedBy = "cart", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    private Set<ProductEntry> productEntities = new HashSet<>();




@Entity
public class ProductEntry {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Exclude
    private int id;
    @OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    @ManyToOne(fetch = FetchType.LAZY)
    private Orders orders;
    @Exclude
    @ManyToOne(fetch = FetchType.EAGER, optional = false)
    private Cart cart;

我的控制器：

@PostMapping("/order/cart")
    public Response createOrderByCart(@RequestBody Map<String, Object> payloadMap) {
        int cartId = (int) payloadMap.get("cart_id");
        Optional<Cart> findCart = cartRepository.findById(cartId);
        if (findCart.isPresent()) {
            final Orders order = new ObjectMapper().convertValue(payloadMap.get("order"), Orders.class);
            Cart cart = findCart.get();
            Set<ProductEntry> productEntities = cart.getProductEntities();
            order.setProductEntities(productEntities);
            double orderTotalAmount = cart.getTotalAmount();
            ordersRepository.save(order);
            return ResponseService.getSuccessResponse(GsonUtil.gson.toJson(order));
        } else {
            String errorMessage = "Not found cart with id " + cartId;
            logger.warn(errorMessage);
            return ResponseService.getErrorResponse(errorMessage);
        }
}

但我在这一行得到错误：

ordersRepository.save(order);

这里错误

2020-04-13 23:19:42.225  INFO 9289 --- [nio-8092-exec-7] r.o.s.e.controller.OrderController       : createOrderByCart: payloadMap: {cart_id=1, order={paymentCardNumber=1111-2222-3333-4444, shipping={price=5.0, currency=USD, contactName=Some name here, address=Some address here, country=Russia, city=Moscow}, promoCode=ABC}}
2020-04-13 23:19:42.236  INFO 9289 --- [nio-8092-exec-7] r.o.s.e.controller.OrderController       : createOrderByCart: use_promo_code_discount
2020-04-13 23:19:42.248 ERROR 9289 --- [nio-8092-exec-7] o.a.c.c.C.[.[.[.[dispatcherServlet]      : Servlet.service() for servlet [dispatcherServlet] in context with path [/api/v1] threw exception [Request processing failed; nested exception is org.springframework.orm.jpa.JpaSystemException: Found shared references to a collection: com.myproject.eshop_orders.api.model.Orders.productEntities; nested exception is org.hibernate.HibernateException: Found shared references to a collection: com.myproject.eshop_orders.api.model.Orders.productEntities] with root cause

org.hibernate.HibernateException: Found shared references to a collection: com.myproject.eshop_orders.api.model.Orders.productEntities
    at org.hibernate.engine.internal.Collections.processReachableCollection(Collections.java:188) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.event.internal.FlushVisitor.processCollection(FlushVisitor.java:50) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.event.internal.AbstractVisitor.processValue(AbstractVisitor.java:104) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.event.internal.AbstractVisitor.processValue(AbstractVisitor.java:65) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.event.internal.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:59) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.event.internal.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:182) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.event.internal.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:232) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:92) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:102) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1352) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:443) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3202) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2370) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:447) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:183) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:40) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:281) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:101) ~[hibernate-core-5.4.13.Final.jar:5.4.13.Final]
    at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:534) ~[spring-orm-5.2.5.RELEASE.jar:5.2.5.RELEASE]
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:743) ~[spring-tx-5.2.5.RELEASE.jar:5.2.5.RELEASE]
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:711) ~[spring-tx-5.2.5.RELEASE.jar:5.2.5.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:631) ~[spring-tx-5.2.5.RELEASE.jar:5.2.5.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:385) ~[spring-tx-5.2.5.RELEASE.jar:5.2.5.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:118) ~[spring-tx-5.2.5.RELEASE.jar:5.2.5.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.5.RELEASE.jar:5.2.5.RELEASE]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.2.5.RELEASE.jar:5.2.5.RELEASE]
4

2 回答 2

0

您在两个不同的实体中使用相同的集合：

Set<ProductEntry> productEntities = cart.getProductEntities();
order.setProductEntities(productEntities);

不要那样做。而是复制元素。

于 2020-04-14T07:58:29.130 回答
0

我有一个类似的问题，因为我试图在两个不同的实体中使用相同的集合。我通过使用 Google Guava 制作副本解决了这个问题。

您的案例的示例解决方案：

import com.google.common.collect.ImmutableSet;
...

order.setProductEntities(ImmutableSet.copyOf(cart.getProductEntities()));
于 2020-10-07T14:25:27.530 回答