引起：org.postgresql.util.PSQLException：錯誤：列 performanc3_.app_user_internal_user_id 不存在

Question

我有這個問題=>

2020-12-08 10:10:31.472 ERROR 7184 --- [  XNIO-1 task-4] c.f.timesheet.service.AppUserService     : Exception in findOne() with cause = 'org.hibernate.exception.SQLGrammarException: could not extract ResultSet' and exception = 'could not extract ResultSet; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not extract ResultSet'

Caused by: org.postgresql.util.PSQLException: ERROR: column performanc3_.app_user_internal_user_id does not exist

我想添加一個與 appUser 具有 oneToMany 關系的新實體。 我在stackoverflow上搜索了一些響應，但很多時候它“只是”模式名稱問題。 所以我為每個實體添加了架構名稱，但它仍然不起作用。

也許問題出在我的要求中？

有實體：

應用用戶：

@Entity
@Table(name = "app_user", schema = "public")
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class AppUser implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @Column(name = "internal_user_id", unique = true, nullable = false)
    private Long id;

    @Column(name = "phone")
    private String phone;

    @OneToOne(cascade = CascadeType.ALL)
    @MapsId
    private User internalUser;

    @ManyToMany
    @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
    @JoinTable(
        name = "app_user_job",
        joinColumns = @JoinColumn(name = "internal_user_id"),
        inverseJoinColumns = @JoinColumn(name = "job_id", referencedColumnName = "id")
    )
    private Set<Job> jobs = new HashSet<>();

    @ManyToOne
    @JsonIgnoreProperties(value = "appUsers", allowSetters = true)
    private Company company;

    @OneToMany(mappedBy = "appUser",cascade = CascadeType.REMOVE)
    @Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
    private Set<Performance> performances = new HashSet<>();

表現：

@Entity
@Table(name = "performance", schema = "public")
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class Performance implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequenceGenerator")
    @SequenceGenerator(name = "sequenceGenerator")
    private Long id;

    @NotNull
    @Min(value = 0)
    @Max(value = 16)
    @Column(name = "hours", nullable = false)
    private Integer hours;

    @NotNull
    @Column(name = "date", nullable = false)
    private LocalDate date;

    @ManyToOne
    @JsonIgnoreProperties(value = "performances_user", allowSetters = true)
    private AppUser appUser;

    @ManyToOne
    @JsonIgnoreProperties(value = "performances_job", allowSetters = true)
    private Job job;

和請求：

 @Query(
        "select appUser from AppUser appUser " +
        "left join fetch appUser.jobs " +
        "left join appUser.performances " +
        " where appUser.id =:id"
    )
    Optional<AppUser> findOneWithEagerRelationships(@Param("id") Long id);

還有 liquibase xml：

應用用戶：

<changeSet id="20201111182357-1" author="jhipster">
    <createTable tableName="app_user">
        <column name="internal_user_id" type="bigint">
            <constraints primaryKey="true" nullable="false"/>
        </column>

        <column name="phone" type="varchar(255)">

            <constraints nullable="true" />
        </column>
        <column name="company_id" type="bigint">
            <constraints nullable="true" />
        </column>
        <!-- jhipster-needle-liquibase-add-column - JHipster will add columns here -->
    </createTable>
</changeSet>
<changeSet id="20201111182357-1-relations" author="jhipster">

    <createTable tableName="app_user_job">
        <column name="job_id" type="bigint">
            <constraints nullable="false"/>
        </column>
        <column name="internal_user_id" type="bigint">
            <constraints nullable="false"/>
        </column>
    </createTable>
    <addPrimaryKey columnNames="internal_user_id, job_id" tableName="app_user_job"/>
    
</changeSet>

表現：

    <changeSet id="20201202093141-1" author="jhipster">
    <createTable tableName="performance">
        <column name="id" type="bigint">
            <constraints primaryKey="true" nullable="false"/>
        </column>
        <column name="hours" type="integer">
            <constraints nullable="false" />
        </column>
        <column name="date" type="date">
            <constraints nullable="false" />
        </column>
        <column name="user_id" type="bigint">
            <constraints nullable="true" />
        </column>
        <column name="job_id" type="bigint">
            <constraints nullable="true" />
        </column>
        <!-- jhipster-needle-liquibase-add-column - JHipster will add columns here -->
    </createTable>
</changeSet>

和他的限制

<changeSet id="20201202093141-2" author="jhipster">
    
    <addForeignKeyConstraint baseColumnNames="user_id"
                             baseTableName="performance"
                             constraintName="fk_performance_user_id"
                             referencedColumnNames="internal_user_id"
                             referencedTableName="app_user"/>

    <addForeignKeyConstraint baseColumnNames="job_id"
                             baseTableName="performance"
                             constraintName="fk_performance_job_id"
                             referencedColumnNames="id"
                             referencedTableName="job"/>

</changeSet>

謝謝

Answer 1

您的@Id列名為internal_user_id ，關系為appUser ，轉換為app_user 。 所以 Hibernate 猜測Performance.appUser JoinColumn 是app_user_internal_user_id 。

當物理列名不明確時，命名策略的工作就是猜測它們！

I guess you're using SpringImplicitNamingStrategy which implements org.hibernate.boot.model.naming.ImplicitNamingStrategy , it's worth reading the doc or this nice article: https://www.baeldung.com/hibernate-naming-strategy

Answer 2

我找到解決方案。 不知道為什么，但它正在搜索一個不存在的 app_user_internal_user_id 列。 我將 @JoinColumn(name = "user_id") 添加到性能實體並且它有效。