spring-data

问题 Spring Data has a native web support for Pageable send over the web, as parameters in HTML Query, through PageableHandlerMethodArgumentResolver. I have not found JPA Specification executor for that, which from my point of view would be very useful. Is there one? 回答1: The reason that there's no generic one available for you is that the predicates you build in it is completely depending on your domain model. A good example for how to use Specification s with Spring MVC can be found in the

问题 Spring Data has a native web support for Pageable send over the web, as parameters in HTML Query, through PageableHandlerMethodArgumentResolver. I have not found JPA Specification executor for that, which from my point of view would be very useful. Is there one? 回答1: The reason that there's no generic one available for you is that the predicates you build in it is completely depending on your domain model. A good example for how to use Specification s with Spring MVC can be found in the

问题 I have a table which requires its primary key as a foreign key to other table, so an unidirectional one-to-one relationship. There will be only an author per book, like this: @Entity public class Author { @Id String code; //getters and setters ... } @Entity public class Book { @Id @OneToOne @JoinColumn(name="code", columnDefinition="DOM_COD5") Author author; //getters and setters } With plain Hibernate and JPA annotations it works well, but using using it through Spring Data I keep getting

问题 Does Spring Data Cassandra support multiple keyspace repositories in the same application context? I am setting up the cassandra spring data configuration using the following JavaConfig class @Configuration @EnableCassandraRepositories(basePackages = "com.blah.repository") public class CassandraConfig extends AbstractCassandraConfiguration { @Override public String getKeyspaceName() { return "keyspace1"; } I tried creating a second configuration class after moving the repository classes to a

问题 i have a problem where i want to test spring data with junit. I use spring data jpa with junit 4 : this is my test class @ContextConfiguration(locations={"classpath*:applicationContext.xml"}) @Transactional @RunWith(SpringJUnit4ClassRunner.class) public class EquipementServiceTest1 { @Autowired IEquipementService equipmentservice; @Before public void setUp() throws Exception { equipmentservice=new EquipementService(); } @Test public void testValidateEquipement() { equipementEntity e =new

问题 i have a problem where i want to test spring data with junit. I use spring data jpa with junit 4 : this is my test class @ContextConfiguration(locations={"classpath*:applicationContext.xml"}) @Transactional @RunWith(SpringJUnit4ClassRunner.class) public class EquipementServiceTest1 { @Autowired IEquipementService equipmentservice; @Before public void setUp() throws Exception { equipmentservice=new EquipementService(); } @Test public void testValidateEquipement() { equipementEntity e =new

问题 I am trying to create a task creation page. There is a form where the user can enter the name, description and task status and save it. However, when I go to the page it shows me this error There was an unexpected error (type=Internal Server Error, status=500). Error during execution of processor 'org.thymeleaf.spring4.processor.attr.SpringInputGeneralFieldAttrProcessor' (index) I also have a delete task in my program and that seems to work perfectly fine. This is what my mainController looks

问题 I have Entity like that @Entity @Table(...) public class ENTITY_1 { //.... private ENTITY_2 entity_2 ; private ENTITY_3 entity_3 ; private Set<ENTITY_3> entities_3 = new HashSet<ENTITY_3>(0); ; private ENTITY_4 entities_4 = new HashSet<ENTITY_4>(0); ; //... and i want to display a result of a query in my jsp so i make a request with fetch to get all the related entities to avoid the lazy initialization exception left join fetch . My request is based on my ENTITY_1 ( select .. from ENTITY_1 )

问题 When using redis as a cache and @Query on a repository method, redis JdkSerializationRedisSerializer , is unable to serialize a projection. Put a github project with tests; https://github.com/varunmehta/spring-cache-error Actual Entity @Entity public class User { @Id private Integer id; private String firstname; private String lastname; private String email; private String address1; private String address2; private String city; private String state; private String country; // ... setter

问题 How can I insert data to a table on Spring Boot application start? My application is generated by JHipster . What I need to check is that if that particular data already exist in that table or not. If it doesn't I should add it. 回答1: You can implement an ApplicationRunner and use a repository to do whatever you need to do. If the ApplicationRunner is a spring bean it is run on application startup. For more sophisticated requirements I would try to rely on a tool like flyway that has good