Question

不幸的是，在这种情况下，附加的实体名称，模式名称不起作用。我不理解这个例子的描述。这意味着什么？

异常[EclipseLink-93]（Eclipse持久性服务 -

2.6.4.qualifier）：org.eclipse.persistence.exceptions.DescriptorException异常   说明：此描述符中不存在表[驱动程序]。   描述符：RelationalDescriptor（com.spring_test2.jpa.models.Tickets    - ＆GT; [DatabaseTable（门票）]）

异常[EclipseLink-93]（Eclipse持久性服务 -   2.6.4.qualifier）：org.eclipse.persistence.exceptions.DescriptorException异常   说明：此描述符中不存在表[ticket]。   描述符：RelationalDescriptor（com.spring_test2.jpa.models.Drivers    - ＆GT; [DatabaseTable（司机）]）

异常[EclipseLink-41]（Eclipse持久性服务 -   2.6.4.qualifier）：org.eclipse.persistence.exceptions.DescriptorException异常   描述：必须为序列定义非只读映射   数字字段。描述：   RelationalDescriptor（com.spring_test2.jpa.models.Tickets - ＆gt;   [DatabaseTable（门票）]）

异常[EclipseLink-41]（Eclipse持久性服务 -   2.6.4.qualifier）：org.eclipse.persistence.exceptions.DescriptorException异常   描述：必须为序列定义非只读映射   数字字段。描述：   RelationalDescriptor（com.spring_test2.jpa.models.Drivers - ＆gt;   [DatabaseTable（司机）]）

在我找不到的实体中没有任何特别的东西，它们经过我的测试。

门票

@Entity
@Table(name = "tickets")
public class Tickets {

    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    @Column(name = "id")
    private Integer id;

    @Column(name = "from_point")
    @Size(min = 0, max = 255)
    private String from;

    @Column(name = "throw")
    @Size(min = 0, max = 255)
    private String throwp; //throw point

    @Column(name = "to_point")
    @Size(min = 0, max = 255)
    private String to;

    @OneToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "city_id")
    private Cities city;

    @Column(name = "hum")
    private Integer hum;

    @Column(name = "cost")
    private Integer cost;

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

    @Column(name = "date", nullable = false, insertable = false, updatable = false, columnDefinition = "Datetime DEFAULT CURRENT_TIMESTAMP")
    @Temporal(TemporalType.TIMESTAMP)
    private Date date;

    @OneToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "ticket_status_id")
    private TicketStatuses ticketStatus;

    @OneToMany(mappedBy = "driver", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    private List<TicketsDrivers> driver;

setters/getters

驱动

@Entity
@Table(name = "drivers")
public class Drivers {

    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    @Column(name = "id")
    private Integer id;

    @OneToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "role_id")
    private Roles role;

    @OneToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "profile_id")
    private Profiles profile;

    @Column(name = "name")
    @Size(min = 0, max = 255)
    private String name;

    @Column(name = "phone")
    @Size(min = 0, max = 255)
    private String phone;

    @Column(name = "mail")
    @Size(min = 0, max = 255)
    private String mail;

    @Column(name = "login")
    @Size(min = 0, max = 32)
    private String login;

    @Column(name = "password")
    @Size(min = 0, max = 32)
    private String password;

    @OneToMany(mappedBy = "ticket", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    private List<TicketsDrivers> tickets;

setters/getters

和TicketsDrivers

@Entity
@Table(name = "tickets_drivers")
public class TicketsDrivers {

@Id
@GeneratedValue(strategy= GenerationType.IDENTITY)
@Column(name = "id")
private Integer id;

@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "driver_id")
private Drivers driver;

@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "ticket_id")
private Tickets ticket;

@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "ticket_status_id")
private TicketStatuses ticket_status;

setters/getters

的persistence.xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
             version="2.0">

    <persistence-unit name="Services" transaction-type="RESOURCE_LOCAL">
        <description>
            Maven Test JPA
        </description>
        <!--provider>org.hibernate.ejb.HibernatePersistence</provider-->
        <class>com.spring_test2.jpa.models.Test</class>
        <class>com.spring_test2.jpa.models.Cities</class>
        <class>com.spring_test2.jpa.models.Countries</class>
        <class>com.spring_test2.jpa.models.Admins</class>
        <class>com.spring_test2.jpa.models.dictionaries.TicketStatuses</class>
        <class>com.spring_test2.jpa.models.dictionaries.StaticPages</class>
        <class>com.spring_test2.jpa.models.dictionaries.Sources</class>
        <class>com.spring_test2.jpa.models.dictionaries.Roles</class>
        <class>com.spring_test2.jpa.models.dictionaries.ProfileTypes</class>
        <class>com.spring_test2.jpa.models.dictionaries.Partners</class>
        <class>com.spring_test2.jpa.models.dictionaries.Newsletter</class>
        <class>com.spring_test2.jpa.models.dictionaries.DriverStatuses</class>
        <class>com.spring_test2.jpa.models.Auto</class>
        <class>com.spring_test2.jpa.models.Drivers</class>
        <class>com.spring_test2.jpa.models.Models</class>
        <class>com.spring_test2.jpa.models.Profiles</class>
        <class>com.spring_test2.jpa.models.Tickets</class>
        <class>com.spring_test2.jpa.models.TicketsDrivers</class>
        <class>com.spring_test2.jpa.models.UndergroundLines</class>
        <class>com.spring_test2.jpa.models.UndergroundStations</class>

        <properties>
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/spring_test2" />
            <property name="javax.persistence.jdbc.user" value="root" />
            <property name="javax.persistence.jdbc.password" value="pwd" />
            <property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)"/>

            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.hbm2ddl.auto" value="update" />
        </properties>

    </persistence-unit>

</persistence>

同样从＆＃34;更新＆＃34;更改hibernate.hbm2ddl.auto到＆＃34;创造＆＃34;例如，没有成功

P.S。

在Tickets＆amp;中的@ManyToOne行之后驱动程序实体被评论说，一个例子消失了。但在这种情况下有什么不对。

在这个项目中我有票＆lt; - ＆gt; tickets_drivers＆lt; - ＆gt;驱动程序多对多连接，我没有使用@ManyToMany因为google说如果我在连接表中有一个或多个附加字段，我必须使用@OneToMany两次。可能是这个错误的原因吗？！

Answer 1

您的映射会混乱，可能是插入中间实体代替ManyToMany关系。错误表明没有'driver'，如果你查看你的tickets.driver映射，它使用的映射为：

@OneToMany(mappedBy = "driver", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    private List<TicketsDrivers> driver;

这说明TicketDrivers与Tickets有一个驱动关系。它没有，因为TicketDrivers.driver映射到Drivers，因此异常。这应该已经被映射为“票证”：

@OneToMany(mappedBy = "ticket", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    private List<TicketsDrivers> driver;

您在驱动程序中也遇到同样的问题。 ID的错误是不同的，并且正在发生，因为实体处理由于上述错误而不完整，或者因为它正在拾取与您发布的内容不同的类。如果ID上的错误仍然存在，请清除它们并发布新问题。

jpa必须为序列号字段定义非只读映射

1 个答案: