我遇到了问题,我在网上找不到任何解决方案。 所以...我在Spring应用程序中使用Hibernate。我正在将Timetable对象插入到我的数据库中。它有一个Movie对象作为其中一个字段。错误说:
数据截断:第1行的列'movie'的数据太长 org.hibernate.exception.DataException:无法插入:[com.model.Timetable]
我不知道为什么我得到错误,因为我没有定义任何类似电影对象的“长度”。是否有最大尺寸的物体或类似物?
我不会显示每个类的整个代码,因为它相当庞大,只有最重要的部分(类有构造函数,getter和setter):
@Entity
@Table(name = "timetable")
public class Timetable implements Serializable {
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "id", unique = true, nullable = false)
private int id;
@ElementCollection
@JoinColumn(name = "timetable_id")
private List<Date> timetable;
@Column(name = "movie")
private Movie movie;
@Column(name = "dubbing")
private boolean dubbing;
}
@Entity
@Table(name = "movies")
public class Movie implements Serializable {
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "id", unique = true, nullable = false)
private int id;
@Column(name = "filmwebID", unique = true, nullable = true, length = 10)
private int filmwebID = 0;
@Column(name = "imdbId", unique = true, nullable = true, length = 10)
private String IMDBID = null;
@Column(name = "title", unique = false, nullable = true, length = 100)
private String title = null;
@Column(name = "polishTitle", unique = false, nullable = true, length = 100)
private String polishTitle = null;
@Column(name = "year", unique = false, nullable = true)
private Integer year = null;
@Column(name = "coverUrl", unique = false, nullable = true, length = 120)
private URL coverUrl = null;
@Column(name = "filmwebUrl", unique = false, nullable = true, length = 120)
private String filmwebUrl = null;
@Column(name = "imdbUrl", unique = false, nullable = true, length = 120)
private String IMDBUrl = null;
@Column(name = "englishDescription", unique = false, nullable = true, length = 500)
private String englishDescription = null;
}
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration SYSTEM
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="hibernate.connection.driver_class">
com.mysql.jdbc.Driver
</property>
<!-- Assume test is the database name -->
<property name="hibernate.connection.url">
jdbc:mysql://localhost:3036/test
</property>
<property name="hibernate.connection.username">
root
</property>
<property name="hbm2ddl.auto">create</property>
<property name="hibernate.bytecode.use_reflection_optimizer">false</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
<mapping class="info.talacha.filmweb.models.Movie" />
<mapping class="info.talacha.filmweb.models.Person" />
<mapping class="com.model.Cinema" />
<mapping class="com.model.Timetable" />
</session-factory>
</hibernate-configuration>
答案 0 :(得分:2)
您应该将movie
字段与@ManyToOne
或@OneToOne
注释对应。此字段是另一个@Entity
- 不是简单类型。
例如:
@ManyToOne
@JoinColumn(name = "movie")
private Movie movie;
这会将movie
列创建为外键到movies
表。
一些有用的链接:
https://docs.jboss.org/hibernate/stable/annotations/reference/en/html_single/ https://howtoprogramwithjava.com/hibernate-manytoone-unidirectional-tutorial/ http://www.dzone.com/tutorials/java/hibernate/hibernate-example/hibernate-mapping-many-to-one-using-annotations-1.html
答案 1 :(得分:2)
如果未定义下面的映射注释,JPA
会假定将ClassDetails
对象(及其所有嵌套图形)保存到DB,因此它会创建一个LOB
类型
OneToOne
ManyToOne
OneToMany
ManyToMany
此外,如果未使用@JoinColumn
,则JPA
会假定将ClassDetails
对象(及其所有嵌套图形)保存到DB,因此会创建LOB
1}}输入
所以声明如下,并由@przemek
涂抹@ManyToOne
@JoinColumn(name = "movie")
private Movie movie;