spring-data-jpa

问题 My friendships sql table has column friend_1, friend_2, status . I have the following mappings in my (snippet below) User class. Currently user.getInitiatedFriendships returns list of Friendships where value of column friend_1 is equal to ID of the user I'm calling this getter on. user.getInvitedToFriendships() returns Friendships where column friend_2 is equal to ID of this user. I want to know if it is possible to add something to this line @OneToMany(mappedBy = "invitingUser" +>some check

问题 My friendships sql table has column friend_1, friend_2, status . I have the following mappings in my (snippet below) User class. Currently user.getInitiatedFriendships returns list of Friendships where value of column friend_1 is equal to ID of the user I'm calling this getter on. user.getInvitedToFriendships() returns Friendships where column friend_2 is equal to ID of this user. I want to know if it is possible to add something to this line @OneToMany(mappedBy = "invitingUser" +>some check

问题 I have two entity classes as below and corresponding repository interface Entity 1 @Data @NoArgsConstructor @Entity @Table(name = "person_details") public class PersonDetails { @Id private String pid; @Column(name = "first_name") private String firstName; @Column(name = "last_name") private String lastName; @Column(name = "exist_flag") private String existFlag; @OneToOne(mappedBy = "personDetails", cascade = CascadeType.ALL) private AddressDetails addressDetails; } Entity 2 @Data

问题 I have an Entity class and I want to count the number of elements that satisfy some conditions in a PostgreSQL database. The entity contains many columns but I just need a response that returns the count of the selected columns as pending, approved, notSubmitted, submitted, approved, notapproved, queried... In order to avoid type mismatch from PostgreSQL driver, I am using the TypedParameterValue method. However I am getting a null value as a response instead of the actual value that should

问题 In my Spring Boot application (based on JHipster 4) I am trying to use property expressions to filter my query by attributes of related entities as described in the Spring docs: https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#repositories.query-methods.query-property-expressions I want to get all Appointments, with a certain EmployeeAccount in their AppointmentSchedules but only receive an empty list. @Repository public interface AppointmentRepository extends JpaRepository

问题 I am trying to execute a raw SQL query against a SQL Server db using a Springboot project. I have the follwing repository: public interface BatchRepository extends PagingAndSortingRepository<Transaction, String> { @Override @Query(value = "SELECT DISTINCT(T.BatchNumber), T.Operator FROM TABLE T", nativeQuery = true) Iterable<Transaction> findAll(); } My entity backing the query is: @Entity @Table(name = "TABLE") public class Transaction implements EntityId<String>, CreatedDateTime,

问题 I have a table CatID | CategoryName | scatID | subCategoryName 2 User 1 x 2 User 2 y 2 User 3 z 2 User 4 a 2 User 5 b I am able to get all the value in JSON formate using SpringBoot. My Requirement : I want to get the unique CategoryName attribute but in current scenario I am getting all User coming 5 times. I am looking for solution. Please any one can help to get over using Spring Boot JPA implementation. 回答1: You can use the Query annotation in your repository interface. For example, below

问题 Closed. This question needs debugging details. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . Improve this question question for JPA-Users, is the following somehow possible? @Query(value = "SELECT * FROM Users u WHERE u.status = :sampleClass.status", nativeQuery = true) List<SampleClass> findBySampleClass(SampleClass sampleClass); Notice the way I am trying to access SampleClass in the @Query

问题 I am working on a project Spring and Java, generated using JHipster. I encounter a problem with the following items of Spring: Specification, Criteria, and filtering a list of items. I have a functioning SQL query, than I want to "translate" as a Spring Specification. But, I don't find how to do it, as the query works on 3 tables, and has 2 conditions. Basically, the work concerns 3 tables: contract, transfer & entry. A contract can be inside one or several transfers, and a transfer contains

问题 I have the following Spring boot service for an object of type Report - @Service public class ReportService { @Autowired private ReportRepository reportRepository; @Autowired private UserRepository userRepository; /*get all reports */ public List<Report> getAllReports(){ return reportRepository.findAll(); } /*get a single report */ public Report getReport(Long id){ return reportRepository.getOne(id); } //other similar methods.... } The problem arises while retrieving a single Report. If a