criteria-api

来源： https://stackoverflow.com/questions/54869033/how-to-add-distinct-property-to-query-with-jpa-specification

来源： https://stackoverflow.com/questions/60827516/hibernate-criteria-api-join-entities-without-any-association

来源： https://stackoverflow.com/questions/60827516/hibernate-criteria-api-join-entities-without-any-association

问题 I have two entities, User and Roles each one with active boolean parameter and ManyToMany relationship. This boolean parameter is used for logical delete. Why does the result include inactive Roles when I run this query below? CriteriaBuilder builder = em.getCriteriaBuilder(); CriteriaQuery<User> query = builder.createQuery(User.class); //Select Root<User> user = query.from(User.class); //Join SetJoin<User, Role> role = user.joinSet("roles", JoinType.LEFT); Predicate rolesActivePredicate =

问题 Having a situation where my java code is symbolic to query - SELECT CUSTOMER_ID, CUSTOMER_NAME, CASE WHEN COUNT (DISTINCT CARD_ID) > 1 THEN 'MULTIPLE' ELSE MAX(CARD_NUM) END AS CARD_NUM FROM CUSTOMER LEFT JOIN CARD ON CARD.CUSTOMER_ID = CUSTOMER.CUSTOMER_ID GROUP BY CUSTOMER_ID, CUSTOMER_NAME Java code for detailed info - CriteriaBuilder cb = em.getCriteriaBuilder(); final CriteriaQuery<Tuple> query = cb.createQuery(Tuple.class); final Root<Customer> root = query.from(Customer.class);

问题 I have entity called Issue and entity called UserIssue . UserIssue extends Issue . @Inheritance(strategy = InheritanceType.JOINED) @Entity(name = "ISSUE") public class Issue extends VersionedSequenceIdEntity { ... all fields } @Entity(name = "USER_ISSUE") public class UserIssue extends Issue { ... @Enumerated(EnumType.STRING) @Column(name = "CATEGORY", nullable = false) private IssueCategory category; ... } I need to do e.g. something like this: Predicate predicate= root.get("category").in

问题 I have entity called Issue and entity called UserIssue . UserIssue extends Issue . @Inheritance(strategy = InheritanceType.JOINED) @Entity(name = "ISSUE") public class Issue extends VersionedSequenceIdEntity { ... all fields } @Entity(name = "USER_ISSUE") public class UserIssue extends Issue { ... @Enumerated(EnumType.STRING) @Column(name = "CATEGORY", nullable = false) private IssueCategory category; ... } I need to do e.g. something like this: Predicate predicate= root.get("category").in

问题 I am implementing a user management system which has the following entities : public class UserEntity implements Serializable { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = "ID") Long id; @Column(unique = true, name = "EMAIL") private String email; @Column(name = "NAME") private String name; @Column(name = "PASSWORD") private String password; @Column(name = "MOBILE") private String mobile; @Column(name = "OWNER_ID") private String ownerId; @Column(name = "TRAINER_ID"

问题 I need to replace the below sql query having left join on 2 tables with 2 same column types by using criteriabuilder api and I am getting following error when I run the program org.hibernate.query.criteria.internal.BasicPathUsageException: Cannot join to attribute of basic type. I checked couple of blogs, examples but couldn't get much help. query that needs to be replaced: SELECT connection_name, connection_date, connection_role, a.code, a.box FROM test.connections a LEFT JOIN test.samples b

问题 I have the following entities: @Entity @Table(name = "place_revision") public class PoiRevision { @OneToMany(mappedBy = "pk.revision", cascade = {CascadeType.ALL}) private Collection<PoiRevisionCategory> categoryMapping; // ... } @Entity @Table(name = "place_revision__category") @AssociationOverrides({ @AssociationOverride(name = "pk.revision", joinColumns = @JoinColumn(name = "place_revision_id")), @AssociationOverride(name = "pk.category", joinColumns = @JoinColumn(name = "category_id")) })