无法检索记录使用jpa库外键时为空

标签：注意   and   删除表   记录   abc   fetch   join   class   too   

请注意账户id并不是唯一的(为简单起见我删除表中的其他参数,使其短)。 一旦我筛选记录,我必须更新LookupRequest。 回调foreignkey条目。 我无法外键为空时检索记录。

import javax.persistence.*;

@Entity
public class LookupRequest {

@Id
@GeneratedValue(strategy= GenerationType.AUTO)
private Long id;

@Column
private String account;

@Column
private String caseId;

@OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY, optional = true)
@JoinColumn(name = "id", unique=false, nullable=true, updatable=true)
private Callback callback;

public LookupRequest(String account, String caseId) {
this.account = account;
this.caseId = caseId;
callback = null;
}

public Long getId() {
return id;
}

public String getAccount() {
return account;
}

public String getCaseId() {
return caseId;
}

public Callback getCallback() {
return callback;
}

public void setCallback(Callback callback) {
this.callback = callback;
}

}

@Repository
public interface LookupRequestRepository extends JpaRepository<LookupRequest, Long> {
@Query("SELECT lr from LookupRequest lr where lr.account = :account and lr.callback = :callback")
LookupRequest findCaseId(@Param("account") String account, @Param("callback") String callback);
}

@Getterbr/>@Setter
@Entity
public class Callback {

@Id
@GeneratedValue(strategy= GenerationType.AUTO)
public Long id;

@Column(length = 20000)
private String rawResponse;

public Long getId() {
    return id;
}

public void setId(Long id) {
    this.id = id;
}

public void setRawResponse(String rawResponse) {
    this.rawResponse = rawResponse;
}

无法检索记录使用jpa库外键时为空

标签：注意   and   删除表   记录   abc   fetch   join   class   too   

原文地址：http://blog.51cto.com/14021402/2331574