Question

我正在尝试编写以下本机SQL查询，但是遇到无法解决的错误。我想写请求sql native ...

我需要您的帮助：）

AssignmentDao：

``@Repository
public interface AssignmentDao extends JpaRepository<Assignment, Integer> { 
    @Query(value ="SELECT project.PROJECT_NAME, contributor.FIRST_NAME, assignment.START_DATE, assignment.END_DATE from assignment join contributor on assignment.CONTRIBUTOR_id=contributor.id join project on assignment.PROJECT_ID_PROJECT=project.ID_PROJECT", nativeQuery=true)
    List<Assignment> fetchAssignmentDataInnerJoin();

AssignmentServiceimpl：

@Service("assignmentService")
public class AssignmentServiceImpl implements AssignmentService {
    @Resource
    private AssignmentDao assignmentDao;    
    public List<Assignment> fetchAssignmentDataInnerJoin(){
        List<Assignment> list = assignmentDao.fetchAssignmentDataInnerJoin();
        return list;

AppController：

    @GetMapping({"/listAssignments"})
    public String listAssignment(ModelMap model) {
        List<Assignment> assignments = assignmentService.fetchAssignmentDataInnerJoin();
        model.addAttribute("assignments", assignments);
        System.out.println("Liste des affectations : " + assignments);
        return "allAssignments";
    }

application.properties：

# Configurations H2
spring.jpa.show-sql=true
spring.h2.console.enabled=true
    # Configuration MariaDB
    spring.datasource.url=jdbc:mariadb://localhost:3308/dbmycapla
    spring.datasource.username=***
    spring.datasource.password=***
    spring.datasource.driver-class-name=org.mariadb.jdbc.Driver
    spring.jpa.properties.hibernate.format_sql=true
    #spring.jpa.hibernate.ddl-auto=create-drop
    logging.level.org.hibernate.SQL=DEBUG
    logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE

这是错误：

    org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute query; SQL [SELECT project.PROJECT_NAME, contributor.FIRST_NAME, assignment.START_DATE, assignment.END_DATE from assignment join contributor on assignment.CONTRIBUTOR_id=contributor.id join project on assignment.PROJECT_ID_PROJECT=project.ID_PROJECT]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute query

    Caused by: java.sql.SQLSyntaxErrorException: No such column: id_assignment
Caused by: org.hibernate.exception.SQLGrammarException: could not execute query

Answer 1

在命令SHOW CREATE TABLE之后：

assignment | CREATE TABLE `assignment` (
  `id_ASSIGNMENT` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `PROJECT_ID_PROJECT` int(10) unsigned NOT NULL,
  `CONTRIBUTOR_id` int(10) unsigned NOT NULL,
  `START_DATE` date NOT NULL,
  `END_DATE` date NOT NULL,
  `ASSIGNMENT_RATE` float NOT NULL DEFAULT 1,
  `ACTIVITY` varchar(45) DEFAULT NULL COMMENT 'Texte libre',
  `BILLABLE` tinyint(1) NOT NULL DEFAULT 1,
  PRIMARY KEY (`id_ASSIGNMENT`,`PROJECT_ID_PROJECT`,`CONTRIBUTOR_id`,`START_DATE`,`END_DATE`),
  KEY `ASSIGNMENT_FKIndex1` (`CONTRIBUTOR_id`),
  KEY `ASSIGNMENT_FKIndex2` (`PROJECT_ID_PROJECT`),
  CONSTRAINT `ASSIGNMENT_ibfk_1` FOREIGN KEY (`CONTRIBUTOR_id`) REFERENCES `contributor` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
  CONSTRAINT `ASSIGNMENT_ibfk_2` FOREIGN KEY (`PROJECT_ID_PROJECT`) REFERENCES `project` (`ID_PROJECT`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB AUTO_INCREMENT=14 DEFAULT CHARSET=utf8 |

如何编写与springboot 2.1和Java 8原生的请求SQL？

1 个答案: