在eclipselink jpa中，与@manyToMany关系中的@JoinTable与非拥有表的查询

Question

拥有@JoinTable（“commit_reference_issue”）的自己的类，我需要使用名为“commit_reference_issue”的表进行连接，并使用非自有类Issue表示的表“issue”。我需要的联接是在课程问题之后显示的。

@Entity
@Table(name="commit")
@NamedQuery(name="Commit.findAll", query="SELECT c FROM Commit c")
public class Commit implements Serializable {
private static final long serialVersionUID = 1L;

@Id
@Column(name="sha", nullable=false, length=45)
private String sha;

//code omitted...

//bi-directional many-to-many association to Issue
@ManyToMany
@JoinTable(name="commit_reference_issue",
    joinColumns = {
        @JoinColumn(name="commit_sha", nullable=false, referencedColumnName = "sha")
    },
    inverseJoinColumns={
        @JoinColumn(name = "issue_number", referencedColumnName = "number"),
        @JoinColumn(name = "issue_repository_id_git", referencedColumnName = "repository_id_git")
    }
)
private List<Issue> issues;
//code omitted...

非自有类问题

@Entity
@Table(name="issue")
@IdClass(IssuePK.class)
@NamedQuery(name="Issue.findAll", query="SELECT i FROM Issue i")
public class Issue implements Serializable {
private static final long serialVersionUID = 1L;

@Id
@Column(name = "number")
private int number;

@Id
@ManyToOne
@JoinColumn(name = "repository_id_git", referencedColumnName = "id_git")
private Repository repository;

//code omitted...

//bi-directional many-to-many association to Commit
@ManyToMany(mappedBy="issues")
private List<Commit> commits;

//code omitted...

如何将此查询翻译为jpa eclipselink中的查询？

的

SELECT i.* FROM issue i INNER JOIN commit_reference_issue cri
ON i.number = cri.issue_number AND 
i.repository_id_git = cri.issue_repository_id_git;

Answer 1

谢谢@Chris！这项工作！我只在JPQL中添加一个子句，因为数据库有许多存储库。 所以这个JPQL是：

“从问题i中选择i加入i.commits c其中i.repository =：arg1”，其中“arg1”是存储库存储库。