我目前正在将 micronaut 数据合并到现有的 micronaut 项目中（作为升级的一部分），并且在延迟获取相关集合（有OneToMany关系）方面遇到了一些问题。
我有以下实体结构：
@Data
@Entity
@NoArgsConstructor
@AllArgsConstructor
@Builder(toBuilder = true)
public class Merchant implements Serializable {
@Id private String name;
private String displayName;
private String staticSiteAddress;
private String emailFromAddress;
private String emailFromName;
private String etmEmailFromAddress;
private String etmEmailFromName;
private String phone;
private String username;
@Embedded private PasswordHash password;
@ToString.Exclude
@EqualsAndHashCode.Exclude
@OneToMany(mappedBy = "merchant", fetch = FetchType.LAZY)
@Builder.Default
private Set<MerchantStore> stores = new HashSet<>();
@ToString.Exclude
@EqualsAndHashCode.Exclude
@OneToMany(mappedBy = "merchant", fetch = FetchType.LAZY)
@Builder.Default
private Set<CustomWebLink> customWebLinks = new HashSet<>();
@ToString.Exclude
@EqualsAndHashCode.Exclude
@OneToMany(mappedBy = "merchant", fetch = FetchType.LAZY)
@Builder.Default
private Set<LoyaltyPlan> loyaltyPlans = new HashSet<>();
@ToString.Exclude
@EqualsAndHashCode.Exclude
@OneToMany(mappedBy = "merchant", fetch = FetchType.LAZY)
@Builder.Default
private Set<MerchantPref> merchantPrefs = new HashSet<>();
}
在手头上，我可以merchantPrefs使用以下存储库方法毫无问题地获取第一级相关实体（即）：
@NonNull
@Override
@Cacheable("merchant")
@Join(value = "stores", type = Join.Type.LEFT_FETCH)
@Join(value = "customWebLinks", type = Join.Type.LEFT_FETCH)
@Join(value = "merchantPrefs", type = Join.Type.LEFT_FETCH)
@Join(value = "loyaltyPlans", type = Join.Type.LEFT_FETCH)
Optional<Merchant> findById(@NonNull @NotNull String s);
awards但是，当我尝试从这个实体中获取一个最里面的集合时：
@Data
@Entity
public class LoyaltyPlan implements Serializable {
@EmbeddedId private LoyaltyPlanID id;
@ToString.Exclude
@EqualsAndHashCode.Exclude
@ManyToOne(fetch = FetchType.LAZY)
@MapsId("merchant")
@JoinColumn(name = "merchant", nullable = false)
private Merchant merchant;
private String displayName;
private String emailFromName;
private String emailFromAddress;
private String uniqueId;
private boolean defaultPlan;
private float pointsFactor;
private boolean hasGiftCards;
private boolean hasLoyaltyCards;
private boolean usesName;
private boolean hasEmail;
private boolean hasCellPhone;
private boolean needsGiftCards;
private boolean needsLoyaltyCards;
private boolean needsName;
private boolean needsEmail;
private boolean needsCellPhone;
private int signupBonus;
private int closingAwardThreshold;
private int maxPointsPerOrder;
private int minPricePerOrder;
private int recentHistoryDays;
private int expiringCouponReminderDays;
@ToString.Exclude
@EqualsAndHashCode.Exclude
@OneToMany(mappedBy = "loyaltyPlan", fetch = FetchType.LAZY)
private List<LoyaltyPlanAward> awards;
}
我得到一个LazyInitializationException.
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: fts.marketing.entities.plan.LoyaltyPlan.awards, could not initialize proxy - no Session
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:606)
at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:218)
at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:585)
at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:149)
at org.hibernate.collection.internal.PersistentBag.iterator(PersistentBag.java:387)
at java.base/java.lang.Iterable.forEach(Iterable.java:74)
at fts.marketing.TestController.doSomething(TestController.java:29)
at fts.marketing.$TestControllerDefinition$Intercepted.$$access$$doSomething(Unknown Source)
at fts.marketing.$TestControllerDefinition$$exec1.invokeInternal(Unknown Source)
at io.micronaut.context.AbstractExecutableMethod.invoke(AbstractExecutableMethod.java:146)
at io.micronaut.aop.chain.MethodInterceptorChain.proceed(MethodInterceptorChain.java:73)
at io.micronaut.transaction.interceptor.TransactionalInterceptor.intercept(TransactionalInterceptor.java:134)
at io.micronaut.aop.chain.MethodInterceptorChain.proceed(MethodInterceptorChain.java:82)
at fts.marketing.$TestControllerDefinition$Intercepted.doSomething(Unknown Source)
at fts.marketing.$TestControllerDefinition$$exec1.invokeInternal(Unknown Source)
at io.micronaut.context.AbstractExecutableMethod.invoke(AbstractExecutableMethod.java:146)
at io.micronaut.context.DefaultBeanContext$4.invoke(DefaultBeanContext.java:474)
at io.micronaut.web.router.AbstractRouteMatch.execute(AbstractRouteMatch.java:312)
at io.micronaut.web.router.RouteMatch.execute(RouteMatch.java:118)
at io.micronaut.http.server.netty.RoutingInBoundHandler.lambda$buildResultEmitter$10(RoutingInBoundHandler.java:1369)
at io.reactivex.internal.operators.flowable.FlowableDefer.subscribeActual(FlowableDefer.java:35)
at io.reactivex.Flowable.subscribe(Flowable.java:14935)
at io.reactivex.Flowable.subscribe(Flowable.java:14882)
at io.micronaut.http.server.context.ServerRequestContextFilter.lambda$doFilter$0(ServerRequestContextFilter.java:62)
at io.reactivex.internal.operators.flowable.FlowableFromPublisher.subscribeActual(FlowableFromPublisher.java:29)
at io.reactivex.Flowable.subscribe(Flowable.java:14935)
at io.reactivex.Flowable.subscribe(Flowable.java:14885)
at io.micronaut.http.server.netty.RoutingInBoundHandler.lambda$buildExecutableRoute$6(RoutingInBoundHandler.java:1074)
at io.micronaut.web.router.DefaultUriRouteMatch$1.execute(DefaultUriRouteMatch.java:80)
at io.micronaut.web.router.RouteMatch.execute(RouteMatch.java:118)
at io.micronaut.http.server.netty.RoutingInBoundHandler.handleRouteMatch(RoutingInBoundHandler.java:698)
at io.micronaut.http.server.netty.RoutingInBoundHandler.channelRead0(RoutingInBoundHandler.java:554)
at io.micronaut.http.server.netty.RoutingInBoundHandler.channelRead0(RoutingInBoundHandler.java:1
此外，这似乎是一个零星的问题，因为有时相同的代码似乎工作正常。我不太确定出了什么问题，我认为我已经正确地建模了关系，因为在迁移到micronaut-data.
我不知道我在这里做错了什么，为了解决这个问题，我们将不胜感激任何帮助。