我目前正在上课。这个想法是建立一个简单的类似Twitter的后端和前端。对于此项目,我们获得了带有三个Maven模块的预构建项目:
该项目使用h2作为休眠数据库,以简化开发。 prebuild的东西效果很好,但是我为您自己的服务定义了这个Post模型:
GetEncountersResponse ClientidEncountersDateGet (string clientid, string date, string startToken = null);
DBIidentified:
import lombok.Data;
import lombok.EqualsAndHashCode;
import javax.json.bind.annotation.JsonbDateFormat;
import javax.persistence.*;
import java.util.Date;
@EqualsAndHashCode(callSuper = true)
@Entity
@Data
public class DBPost extends DBIdentified {
private String message;
private String author;
@Temporal(TemporalType.TIMESTAMP)
@JsonbDateFormat(value = JsonbDateFormat.TIME_IN_MILLIS)
private Date creationDate;
public DBPost() {
}
}
StartupBean:
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
@MappedSuperclass
public class DBIdentified {
private long id;
@Id
@GeneratedValue
public long getId() {
return this.id;
}
public void setId(final long id) {
this.id = id;
}
}
当我尝试在数据库中的Buisness模块的Bean中插入一个Post时,出现以下错误消息:
@PostConstruct
public void startup() {
final DBPost firstPost = this.entityManager.find(DBPost.class, 1L);
// only initialize once
if (firstPost == null) {
final DBPost post = new DBPost();
post.setUrl("https://dl.gitea.io/gitea/1.8.2/");
post.setAuthor("Gitea");
post.setUrgent(false);
post.setVersion("1.8.2");
post.setCreationDate(new Date());
post.setMessage("BUGFIXES\n" +
"\n" +
" Fix possbile mysql invalid connnection error (#7051) (#7071)\n" +
" Handle invalid administrator username on install page (#7060) (#7063)\n" +
" Disable arm7 builds (#7037) (#7042)\n" +
" Fix default for allowing new organization creation for new users (#7017) (#7034)\n" +
" SearchRepositoryByName improvements and unification (#6897) (#7002)\n" +
" Fix u2f registrationlist ToRegistrations() method (#6980) (#6982)\n" +
" Allow collaborators to view repo owned by private org (#6965) (#6968)\n" +
" Use AppURL for Oauth user link (#6894) (#6925)\n" +
" Escape the commit message on issues update (#6901) (#6902)\n" +
" Fix regression for API users search (#6882) (#6885)\n" +
" Handle early git version's lack of get-url (#7065) (#7076)\n" +
" Fix wrong init dependency on markup extensions (#7038) (#7074)\n");
this.entityManager.persist(post);
}
}
我想我需要将数据库中的消息类型更改为Caused by: org.h2.jdbc.JdbcSQLException: Value too long for column "MESSAGE VARCHAR(255)": "STRINGDECODE('BUGFIXES\n\n Fix possbile mysql invalid connnection error (#7051) (#7071)\n Handle invalid administrator use... (790)"; SQL statement:
或TEXT
之类。
但是所有用于注释LONGTEXT
的方法都失败了:
private String message
@Type(type="text")
@Column(length= Integer.MAX_VALUE)
@Column(columnDefinition="CLOB")
@Column(columnDefinition="TEXT")
@Column(length=65535, columnDefinition="Text")
问题可能出在不同的模块上,而持久性模块是否包含在商务模块中?还是我只是在休眠方面做错了什么?
答案 0 :(得分:0)
这是您需要的注释:
@Column(columnDefinition="TEXT")
答案 1 :(得分:0)
经过一番搜索,我得到了答案:
在DBIdentified
中,对getter进行了注释,在DBPost
中,对字段进行了注释。字段和getter注释的混合不起作用,因为hibernate将搜索@Id注释并假定一切都与之相似。
所以解决方法是
DBIdentified
:
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
@MappedSuperclass
public class DBIdentified {
@Id
@GeneratedValue
private long id;
public long getId() {
return this.id;
}
public void setId(final long id) {
this.id = id;
}
}