Question

我正在开发一个maven JDO项目，但是当我尝试在两个表之间建立关系时，我收到此错误（user_login，user_role）

User_Login：user_id（主键），user_name，user_password，user_role_id

User_Role：id（主键），角色

user_role_id与user_role表的ID相同

User.java：

@PersistenceCapable(table = "user_login")
public class User {  
@PrimaryKey
@Column(name="user_id")
private Integer userId=0;
@Column(name="user_profile_name")
private String userProfileName=null; 
@Column(name="user_email")
private String userEmail=null;
@Column(name="user_contact")
private String userContact=null;
@Column(name="user_name")
private String userName=null;
@Column(name="user_password")
private String userPassword=null;
@ManyToOne
@Column(name="user_role_id")   
private Integer userRoleId=0;

Role.java：

@PersistenceCapable(table = "user_role")
public class Role {
@PrimaryKey
@Column(name="id")
private Integer id=0;
@Column(name="role")
private String role=null;   

@OneToMany
private User userInfo=null;

DAOImpol：

public List<Role> getUser(String username, String userpassword) {
    PersistenceManager pm = this.pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    JDOPersistenceManager jdopm = (JDOPersistenceManager)pm;       
    try {
    // Start the transaction
    tx.begin(); 

    TypesafeQuery<User> tq = jdopm.newTypesafeQuery(User.class);
    //QUser user = QUser.candidate();
    QRole role = QRole.candidate();
    QUser userInfo=role.userInfo;
    List<Role> result = tq.filter(userInfo.userName.eq(username).and(userInfo.userPassword.eq(userpassword))).executeList();

    //result = tq.executeResultList(true, user.userId);

    if(result.size()>0){
        log.info(">>>>>00000000"+"    "+result.get(0).getUser().getUserEmail());
        log.info(">>>>>11111111"+"    "+result.get(0).getRoleId()+"    "+result.get(0).getRole());
    }else{
        log.info("<<<<<<<=====000000");
    }
    // Commit the transaction, flushing the object to the datastore
    tx.commit();
    return result;
    }
    finally {
        if (tx.isActive())
        {
            // Error occurred so rollback the transaction
            tx.rollback();
        }
        pm.close();
    }

我收到此错误：

javax.jdo.JDOUserException: Variable 'this.userInfo' is unbound and 
cannot be determined (is it a misspelled field name? or is not intended
to be a variable?)
NestedThrowables:
org.datanucleus.exceptions.NucleusUserException: Variable 
'this.userInfo' is unbound and cannot be determined (is it a   
misspelled   
field name? or is not intended to be a variable?)

Answer 1

如果您使用progaurd并且progaurd重命名您的私人字段，我发现您将从JDO收到此错误。在progaurd配置中添加-keep以保持包含Persistence Capable类的包将修复它。

例如，如果将所有Persistence Capable类保留在com.example.server.orm包中，则将其添加到progaurd.conf

-keep class com.example.server.orm.** {*;}

变量'this.userInfo'未绑定且无法确定

1 个答案: