HY,
我的Spring Data / JPA项目出现此错误:
SQL Error: -206, SQLState: 42703
DB2 SQL Error: SQLCODE=-206, SQLSTATE=42703, SQLERRMC=UDSADONNEE0_.UDSACONNEX_IDCONNEX, DRIVER=4.19.26
SQL Error: -727, SQLState: 56098
DB2 SQL Error: SQLCODE=-727, SQLSTATE=56098, SQLERRMC=2;-206;42703;UDSADONNEE0_.UDSACONNEX_IDCONNEX, DRIVER=4.19.26
SQL Error: -727, SQLState: 56098
DB2 SQL Error: SQLCODE=-727, SQLSTATE=56098, SQLERRMC=2;-206;42703;UDSADONNEE0_.UDSACONNEX_IDCONNEX, DRIVER=4.19.26
Enter: fr.cnaf.middle.sauvegardeauto.web.rest.errors.ExceptionTranslator.processRuntimeException() with argument[s] = [org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: could not extract ResultSet (through reference chain: fr.cnaf.middle.sauvegardeauto.repository.entity.Udsaconnex["udsadonnees"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: could not extract ResultSet (through reference chain: fr.cnaf.middle.sauvegardeauto.repository.entity.Udsaconnex["udsadonnees"])]
Exit: fr.cnaf.middle.sauvegardeauto.web.rest.errors.ExceptionTranslator.processRuntimeException() with result = <500 Internal Server Error,fr.cnaf.middle.sauvegardeauto.web.rest.errors.ErrorDTO@70b511c1,{}>
我搜索,但我发现我的实体没有问题。
Udsaconnex:
@Entity
@NamedQuery(name="Udsaconnex.findAll", query="SELECT u FROM Udsaconnex u")
public class Udsaconnex implements Serializable {
private static final long serialVersionUID = 1L;
@Id
private long idconnex;
private String clesecrete;
private Timestamp dateconnex;
private String mel;
private int tel;
//bi-directional many-to-one association to Udsadonnees
@OneToMany(mappedBy="udsaconnex")
private List<Udsadonnees> udsadonnees;
//Getter and setter
}
Udsadonnees:
@Entity
@NamedQuery(name="Udsadonnees.findAll", query="SELECT u FROM Udsadonnees u")
@Table(name="udsadonnees")
public class Udsadonnees implements Serializable {
private static final long serialVersionUID = 1L;
@Id
private long idata;
@Lob
@Column(name="\"DATA\"")
private String data;
//bi-directional many-to-one association to Udsaconnex
@ManyToOne
private Udsaconnex udsaconnex;
public Udsadonnees() {
}
//Getter and Setter
}
我的CrudRepository:
public interface UDADRESSRepository extends CrudRepository<Udadress, Integer> {
}
数据库:
我认为问题来自实体,但我找不到这个问题......
我有人有个主意......
答案 0 :(得分:0)
您无法将enitity的双向关系转换为JSON。你得到一个无限循环尝试添加@JsonIgnore来打破你的双向关联循环
@ManyToOne
@JsonIgnore
private Udsaconnex udsaconnex;
@jsonsetter
public void setUdsaconnex(Udsaconnex udsaconnex){
this.udsaconnex = udsaconnex;
}
答案 1 :(得分:-1)
我遇到了同样的问题,这对我有用:
在父类中:
<ng-container *ngFor="let item of logList">
<div class="list-cell" (click)="onRowClicked(item)">
<mat-grid-tile> {{item.name}} </mat-grid-tile>
<mat-grid-tile> {{item.time}} </mat-grid-tile>
<mat-grid-tile> {{item.size}} </mat-grid-tile>
</div>
</ng-container>
在子类中:
@JsonIgnore // to break endless loop in bi-directional association
public List<Udsaconnex> getUdsadonnees() {
return udsadonnees;
}
这两个更改将解决您的问题。