jpa

问题 There are 2 entities: Deck and Card. Each Deck contains 8 out of 100 possible Cards. Since each Deck contains more than one Card and the Card can also be part of many different Decks, I joined them by creating a new table called deck_cards. @Data @Entity @Table(name = "cards") public class Card { @Id private Integer id; @NotBlank private String icon; @NotBlank private String name; @ManyToMany(fetch = FetchType.LAZY, cascade = { CascadeType.PERSIST, CascadeType.MERGE }, mappedBy = "cards")

问题 I try "kotlin - spring boot 2 - jpa".I just started to study spring-boot. I have model, repository and app files. I`m use start.spring.io for starting.I’ve seen examples with web, but I don’t need a web. I have error during compilation. Why ? How can I fix this error? 2018-12-21 13:26:02.732 INFO 28188 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL95Dialect 2018-12-21 13:26:02.923 INFO 28188 --- [ main] o.h.e.j.e.i.LobCreatorBuilderImpl

问题 I am trying to invoke a Stored Procedure whose signature looks like the following: CREATE OR REPLACE PROCEDURE FIND_FIRST_BOOKMARK_GT(bookmark IN NUMBER, cur OUT SYS_REFCURSOR) I am using Spring-Data JPA and have tried a number of different variants, but all of them follow more or less the following pattern. My entity model is decorated as follows: @NamedStoredProcedureQuery(name = "Response.findFirstBookmarkGreaterThan", procedureName = "FIND_FIRST_BOOKMARK_GT", resultClasses = Response

问题 Just now I wrote a NamedQuery for a JPA entity and was very happy about that. Here it is. @NamedQuery(name=Panties.RED_PANTIES_QRY, query="SELECT p FROM Panties p WHERE p.color = red") public class Panties implements Serializable { public static final String RED_PANTIES_QRY = "panties.red_panties"; //getters and setters } With the usage entityManager.createNamedQuery(Panties.RED_PANTIES_QRY).getResultList(); One could also omit the NamedQuery annotation and just do public class Panties

问题 I'm developing a RESTful webservice with spring-data as its data access layer, backed by JPA/Hibernate. It is very common to have relationships between domain entities. For example, imagine an entity Product which has a Category entity. Now, when the client POST s a Product representation to a JAX-RS method. That method is annotated with @Transactional to wrap every repository operation in a transaction. Of course, the client only sends the id of an already existing Category , not the whole

问题 I'm developing a RESTful webservice with spring-data as its data access layer, backed by JPA/Hibernate. It is very common to have relationships between domain entities. For example, imagine an entity Product which has a Category entity. Now, when the client POST s a Product representation to a JAX-RS method. That method is annotated with @Transactional to wrap every repository operation in a transaction. Of course, the client only sends the id of an already existing Category , not the whole

问题 I'm developing a RESTful webservice with spring-data as its data access layer, backed by JPA/Hibernate. It is very common to have relationships between domain entities. For example, imagine an entity Product which has a Category entity. Now, when the client POST s a Product representation to a JAX-RS method. That method is annotated with @Transactional to wrap every repository operation in a transaction. Of course, the client only sends the id of an already existing Category , not the whole

问题 I want to compare the date in database with current dateTime in JPA query : captureLimitDate < currentDateTime my requirement is as follows : database.captureLimitDate : 04/07/2012 19:03:00 currentDateTime : 04/07/2012 20:03:00 My JPAQuery is this : SELECT o FROM Operation o" + " WHERE ( o.merchantId =:merchantId ) AND " + "(o.captureLimitDate < currentDateTime ) "; And Operation class has captureLimitDate as java.util.Date @Generated(value = "XA", comments = "0,_8BedAMXZEeGHf_Dj4YaPyg")

问题 I want to compare the date in database with current dateTime in JPA query : captureLimitDate < currentDateTime my requirement is as follows : database.captureLimitDate : 04/07/2012 19:03:00 currentDateTime : 04/07/2012 20:03:00 My JPAQuery is this : SELECT o FROM Operation o" + " WHERE ( o.merchantId =:merchantId ) AND " + "(o.captureLimitDate < currentDateTime ) "; And Operation class has captureLimitDate as java.util.Date @Generated(value = "XA", comments = "0,_8BedAMXZEeGHf_Dj4YaPyg")

问题 I'm working on a project which aims to allow a user to add some film details to a database and displays the list of existing films. I have created a Dynamic Web Project in Eclipse using JPA to communicate with a remote database. All of this works fine when I run the project in the Eclipse IDE but when I export it to a WAR and deploy it on a Tomcat server the JPA functionality no longer works. The following error is thrown: javax.servlet.ServletException: Servlet execution threw an exception