ключ Hibernate Foriegn не работает, SSH

3 таблицы в MySQL, как это:ключ Hibernate Foriegn не работает, SSH

CREATE TABLE tstudent(
    id varchar(36) primary key not null, 
    firstname VARCHAR(30) NOT NULL, 
    lastname VARCHAR(30) NOT NULL, 
    grade int NOT NULL, 
    sex VARCHAR(1)  NOT NULL, 
    birthday DATE, 
    dayorboarding VARCHAR(1) NOT NULL, 
    age int , 
    house VARCHAR(20), 
    mentor VARCHAR(50) 
); 


CREATE TABLE ttrip(
    id varchar(36) primary key not null, 
    departureday  DATE   NOT NULL, 
    name varchar(100) not null unique 
); 

CREATE TABLE tsignup(
    id varchar(36) primary key not null, 
    s_id varchar(36) not null, 
    FOREIGN KEY (s_id) REFERENCES tstudent(id), 
    t_id varchar(36) not null, 
    FOREIGN KEY (t_id) REFERENCES ttrip(id), 
    departuretransport VARCHAR(1) NOT NULL, 
    returntransport VARCHAR(1) NOT NULL, 
    remark TEXT 
);

tstudent модель любит это:

package cz.model; 

import java.util.Date; 
import java.util.HashSet; 
import java.util.Set; 
import javax.persistence.CascadeType; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.FetchType; 
import javax.persistence.Id; 
import javax.persistence.OneToMany; 
import javax.persistence.Table; 
import javax.persistence.Temporal; 
import javax.persistence.TemporalType; 

/** 
* Tstudent entity. @author MyEclipse Persistence Tools 
*/ 
@Entity 
@Table(name = "tstudent", catalog = "rlcbau") 
public class Tstudent implements java.io.Serializable { 

    // Fields 

    private String id; 
    private String firstname; 
    private String lastname; 
    private Integer grade; 
    private String sex; 
    private Date birthday; 
    private String dayorboarding; 
    private Integer age; 
    private String house; 
    private String mentor; 
    private Set<Tsignup> tsignups = new HashSet<Tsignup>(0); 

    // Constructors 

    /** default constructor */ 
    public Tstudent() { 
    } 

    /** minimal constructor */ 
    public Tstudent(String id, String firstname, String lastname, Integer grade, String sex, String dayorboarding) { 
     this.id = id; 
     this.firstname = firstname; 
     this.lastname = lastname; 
     this.grade = grade; 
     this.sex = sex; 
     this.dayorboarding = dayorboarding; 
    } 

    /** full constructor */ 
    public Tstudent(String id, String firstname, String lastname, Integer grade, String sex, Date birthday, String dayorboarding, Integer age, String house, String mentor, Set<Tsignup> tsignups) { 
     this.id = id; 
     this.firstname = firstname; 
     this.lastname = lastname; 
     this.grade = grade; 
     this.sex = sex; 
     this.birthday = birthday; 
     this.dayorboarding = dayorboarding; 
     this.age = age; 
     this.house = house; 
     this.mentor = mentor; 
     this.tsignups = tsignups; 
    } 

    // Property accessors 
    @Id 
    @Column(name = "id", unique = true, nullable = false, length = 36) 
    public String getId() { 
     return this.id; 
    } 

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

    @Column(name = "firstname", nullable = false, length = 30) 
    public String getFirstname() { 
     return this.firstname; 
    } 

    public void setFirstname(String firstname) { 
     this.firstname = firstname; 
    } 

    @Column(name = "lastname", nullable = false, length = 30) 
    public String getLastname() { 
     return this.lastname; 
    } 

    public void setLastname(String lastname) { 
     this.lastname = lastname; 
    } 

    @Column(name = "grade", nullable = false) 
    public Integer getGrade() { 
     return this.grade; 
    } 

    public void setGrade(Integer grade) { 
     this.grade = grade; 
    } 

    @Column(name = "sex", nullable = false, length = 1) 
    public String getSex() { 
     return this.sex; 
    } 

    public void setSex(String sex) { 
     this.sex = sex; 
    } 

    @Temporal(TemporalType.DATE) 
    @Column(name = "birthday", length = 10) 
    public Date getBirthday() { 
     return this.birthday; 
    } 

    public void setBirthday(Date birthday) { 
     this.birthday = birthday; 
    } 

    @Column(name = "dayorboarding", nullable = false, length = 1) 
    public String getDayorboarding() { 
     return this.dayorboarding; 
    } 

    public void setDayorboarding(String dayorboarding) { 
     this.dayorboarding = dayorboarding; 
    } 

    @Column(name = "age") 
    public Integer getAge() { 
     return this.age; 
    } 

    public void setAge(Integer age) { 
     this.age = age; 
    } 

    @Column(name = "house", length = 20) 
    public String getHouse() { 
     return this.house; 
    } 

    public void setHouse(String house) { 
     this.house = house; 
    } 

    @Column(name = "mentor", length = 50) 
    public String getMentor() { 
     return this.mentor; 
    } 

    public void setMentor(String mentor) { 
     this.mentor = mentor; 
    } 

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "tstudent") 
    public Set<Tsignup> getTsignups() { 
     return this.tsignups; 
    } 

    public void setTsignups(Set<Tsignup> tsignups) { 
     this.tsignups = tsignups; 
    } 

}

ttrip модель любит это:

package cz.model; 

import java.util.Date; 
import java.util.HashSet; 
import java.util.Set; 
import javax.persistence.CascadeType; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.FetchType; 
import javax.persistence.Id; 
import javax.persistence.OneToMany; 
import javax.persistence.Table; 
import javax.persistence.Temporal; 
import javax.persistence.TemporalType; 
import javax.persistence.UniqueConstraint; 

/** 
* Ttrip entity. @author MyEclipse Persistence Tools 
*/ 
@Entity 
@Table(name = "ttrip", catalog = "rlcbau", uniqueConstraints = @UniqueConstraint(columnNames = "name")) 
public class Ttrip implements java.io.Serializable { 

    // Fields 

    private String id; 
    private String departureday; 
    private String name; 
    private Set<Tsignup> tsignups = new HashSet<Tsignup>(0); 

    // Constructors 

    /** default constructor */ 
    public Ttrip() { 
    } 

    /** minimal constructor */ 
    public Ttrip(String id, String departureday, String name) { 
     this.id = id; 
     this.departureday = departureday; 
     this.name = name; 
    } 

    /** full constructor */ 
    public Ttrip(String id, String departureday, String name, Set<Tsignup> tsignups) { 
     this.id = id; 
     this.departureday = departureday; 
     this.name = name; 
     this.tsignups = tsignups; 
    } 

    // Property accessors 
    @Id 
    @Column(name = "id", unique = true, nullable = false, length = 36) 
    public String getId() { 
     return this.id; 
    } 

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


    @Column(name = "departureday", nullable = false, length = 10) 
    public String getDepartureday() { 
     return this.departureday; 
    } 

    public void setDepartureday(String departureday) { 
     this.departureday = departureday; 
    } 

    @Column(name = "name", unique = true, nullable = false, length = 100) 
    public String getName() { 
     return this.name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "ttrip") 
    public Set<Tsignup> getTsignups() { 
     return this.tsignups; 
    } 

    public void setTsignups(Set<Tsignup> tsignups) { 
     this.tsignups = tsignups; 
    } 

}

tsignup модель это нравится:

import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.FetchType; 
import javax.persistence.Id; 
import javax.persistence.JoinColumn; 
import javax.persistence.ManyToOne; 
import javax.persistence.Table; 

/** 
* Tsignup entity. @author MyEclipse Persistence Tools 
*/ 
@Entity 
@Table(name = "tsignup", catalog = "rlcbau") 
public class Tsignup implements java.io.Serializable { 

    // Fields 

    private String id; 
    private Ttrip ttrip; 
    private Tstudent tstudent; 
    private String departuretransport; 
    private String returntransport; 
    private String remark; 

    // Constructors 

    /** default constructor */ 
    public Tsignup() { 
    } 

    /** minimal constructor */ 
    public Tsignup(String id, Ttrip ttrip, Tstudent tstudent, String departuretransport, String returntransport) { 
     this.id = id; 
     this.ttrip = ttrip; 
     this.tstudent = tstudent; 
     this.departuretransport = departuretransport; 
     this.returntransport = returntransport; 
    } 

    /** full constructor */ 
    public Tsignup(String id, Ttrip ttrip, Tstudent tstudent, String departuretransport, String returntransport, String remark) { 
     this.id = id; 
     this.ttrip = ttrip; 
     this.tstudent = tstudent; 
     this.departuretransport = departuretransport; 
     this.returntransport = returntransport; 
     this.remark = remark; 
    } 

    // Property accessors 
    @Id 
    @Column(name = "id", unique = true, nullable = false, length = 36) 
    public String getId() { 
     return this.id; 
    } 

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

    @ManyToOne(fetch = FetchType.LAZY) 
    @JoinColumn(name = "t_id", nullable = false) 
    public Ttrip getTtrip() { 
     return this.ttrip; 
    } 

    public void setTtrip(Ttrip ttrip) { 
     this.ttrip = ttrip; 
    } 

    @ManyToOne(fetch = FetchType.LAZY) 
    @JoinColumn(name = "s_id", nullable = false) 
    public Tstudent getTstudent() { 
     return this.tstudent; 
    } 

    public void setTstudent(Tstudent tstudent) { 
     this.tstudent = tstudent; 
    } 

    @Column(name = "departuretransport", nullable = false, length = 1) 
    public String getDeparturetransport() { 
     return this.departuretransport; 
    } 

    public void setDeparturetransport(String departuretransport) { 
     this.departuretransport = departuretransport; 
    } 

    @Column(name = "returntransport", nullable = false, length = 1) 
    public String getReturntransport() { 
     return this.returntransport; 
    } 

    public void setReturntransport(String returntransport) { 
     this.returntransport = returntransport; 
    } 

    @Column(name = "remark", length = 65535) 
    public String getRemark() { 
     return this.remark; 
    } 

    public void setRemark(String remark) { 
     this.remark = remark; 
    } 

}

У меня есть "signupAction" любит это:

public void save_stulst(){ 
     Json j = new Json(); 
     try { 
//   logger.info(signup.getId()+signup.getS_id()+signup.getT_id()+signup.getRemark()+signup.getDeparturetransport()+signup.getReturntransport()); 
      signupService.save_stulst(signup); 
      j.setSuccess(true); 
      j.setMsg("Signup succeeds!"); 

     } catch (Exception e) { 
      j.setMsg(e.getMessage()); 
     } 
     super.writeJson(j); 
    }

и в уровне обслуживания, у меня есть "signupService":

@Service(value="signupService") 
public class SignupServiceImpl implements SignupServiceI { 

    /** 
    * Logger for this class 
    */ 
    private static final Logger logger = Logger.getLogger(StudentServiceImpl.class); 


    private BaseDaoI<Tsignup> signupDao; 
    private BaseDaoI<Tstudent> studentDao; 
    private BaseDaoI<Ttrip> tripDao; 


    public BaseDaoI<Tsignup> getSignupDao() { 
     return signupDao; 
    } 

    @Autowired 
    public void setSignupDao(BaseDaoI<Tsignup> signupDao) { 
     this.signupDao = signupDao; 
    } 

    public BaseDaoI<Ttrip> getTripDao() { 
     return tripDao; 
    } 

    @Autowired 
    public void setTripDao(BaseDaoI<Ttrip> tripDao) { 
     this.tripDao = tripDao; 
    } 

    public BaseDaoI<Tstudent> getStudentDao() { 
     return studentDao; 
    } 

    @Autowired 
    public void setStudentDao(BaseDaoI<Tstudent> studentDao) { 
     this.studentDao = studentDao; 
    } 

    @Override 
    public void save_stulst(Signup signup) { 

     Tsignup tsignup = new Tsignup(); 
     Tstudent tstudent = studentDao.get(Tstudent.class, signup.getS_id()); 
     Ttrip ttrip = tripDao.get(Ttrip.class, signup.getT_id()); 


     BeanUtils.copyProperties(signup, tsignup, new String[]{"id"}); 
     tsignup.setId(UUID.randomUUID().toString()); 
     tsignup.setTstudent(tstudent); 
     tsignup.setTtrip(ttrip); 


     signupDao.save(tsignup); 
    }

Он является baseDaoImpl: пакет cz.dao.impl;

import org.apache.log4j.Logger; 

import java.io.Serializable; 
import java.util.List; 
import java.util.Map; 

import org.hibernate.Query; 
import org.hibernate.Session; 
import org.hibernate.SessionFactory; 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Repository; 

import cz.dao.BaseDaoI; 

@Repository("baseDao") 
public class BaseDaoImpl<T> implements BaseDaoI<T> { 
/** 
* Logger for this class 
*/ 
private static final Logger logger = Logger.getLogger(BaseDaoImpl.class); 

private SessionFactory sessionFactory; 

public SessionFactory getSessionFactory() { 
    return sessionFactory; 
} 

@Autowired 
public void setSessionFactory(SessionFactory sessionFactory) { 
    this.sessionFactory = sessionFactory; 
} 

private Session getCurrentSession(){ 
    return this.sessionFactory.getCurrentSession(); 
} 

@Override 
public Serializable save(T o) { 
    return this.getCurrentSession().save(o); 
} 

@Override 
public T get(Class<T> c, Serializable id) { 
    return (T) this.getCurrentSession().get(c, id); 
} 

@Override 
public T get(String hql) { 
    Query q = this.getCurrentSession().createQuery(hql); 
    List<T> l = q.list(); 
    if (l!=null && l.size()>0){ 
     return l.get(0); 
    }else{ 
     return null; 
    } 
} 

@Override 
public T get(String hql, Map<String, Object> params) { 
    Query q = this.getCurrentSession().createQuery(hql); 
    if(params != null && !params.isEmpty()){ 
     for (String key : params.keySet()){ 
      q.setParameter(key, params.get(key)); 
     } 
    } 
    List<T> l = q.list(); 
    if (l!=null && l.size()>0){ 
     return l.get(0); 
    }else{ 
     return null; 
    } 
} 

@Override 
public void delete(T o) { 
    this.getCurrentSession().delete(o); 
} 

@Override 
public void update(T o) { 
    this.getCurrentSession().update(o); 
} 

@Override 
public void saveOrUpdate(T o) { 
    this.getCurrentSession().save(o); 

} 

@Override 
public List<T> find(String hql) { 
    Query q = this.getCurrentSession().createQuery(hql); 
    return q.list(); 
} 

@Override 
public List<T> find(String hql, Map<String, Object> params) { 
    Query q = this.getCurrentSession().createQuery(hql); 
    if(params != null && !params.isEmpty()){ 
     for (String key : params.keySet()){ 
      q.setParameter(key, params.get(key)); 
     } 
    } 
    return q.list(); 

} 

@Override 
public List<T> find(String hql, Map<String, Object> params, int page, int rows) { 
    Query q = this.getCurrentSession().createQuery(hql); 
    if(params != null && !params.isEmpty()){ 
     for (String key : params.keySet()){ 
      q.setParameter(key, params.get(key)); 
     } 
    } 
    return q.setFirstResult((page - 1) * rows).setMaxResults(rows).list(); 
} 

@Override 
public List<T> find(String hql, int page, int rows) { 
    Query q = this.getCurrentSession().createQuery(hql); 
    return q.setFirstResult((page - 1) * rows).setMaxResults(rows).list(); 
} 

@Override 
public Long count(String hql) { 
    Query q = this.getCurrentSession().createQuery(hql); 
    return (Long) q.uniqueResult(); 
} 

@Override 
public Long count(String hql, Map<String, Object> params) { 
    Query q = this.getCurrentSession().createQuery(hql); 
    if(params != null && !params.isEmpty()){ 
     for (String key : params.keySet()){ 
      q.setParameter(key, params.get(key)); 
     } 
    } 
    return (Long) q.uniqueResult(); 
} 

@Override 
public int executeHql(String hql) { 
    Query q = this.getCurrentSession().createQuery(hql); 
    return q.executeUpdate(); 
} 





}

Вопрос: Когда я пытаюсь спасти от сети, я получаю ошибки как это:

[org.hibernate.engine.jdbc.spi.SqlExceptionHelper]SQL Error: 1048, SQLState: 23000 
[org.hibernate.engine.jdbc.spi.SqlExceptionHelper]Column 's_id' cannot be null 
[org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl]HHH000010: On release of batch it still contained JDBC statements

Я новичок в спящий режим, не уверены, какой шаг является неправильным. Я дал ttrip и tstudent в tsignup model. Он должен был быть сохранен.

источник

2015-11-27 Colin Zhong

Хорошо, ваше определение таблицы «tsignup» ясно показывает ограничение NOT NULL в столбце «s_id». Вам это действительно нужно? Если не удалить его, и это должно работать

Приветствия Anant

источник

2015-11-27 04:10:06

Да мне нужно это не нулевой –

ваш "save_stulst" API должен иметь объект «signup», заполненный соответствующим «студенческим» объектом! –

Извините, все, мое плохое. Я испортил ценности. :( –

Меняйте tsignup стол

CREATE TABLE tsignup(
    ... 
    s_id varchar(36) not null, 
    ...

Для

CREATE TABLE tsignup(
    ... 
    s_id VARCHAR(36) NULL, 
    ...

источник

2015-11-27 04:17:50

Мне нужно это как не null. Изменил таблицу, как вы предложили, но это дает мне: значение NULL в s_id –

Если вы действительно нужно, чтобы этот столбец был не нулевым, тогда вы должны передать значение этому. –

Извините, я, мой плохой. Я испортил значения. :( –

ключ Hibernate Foriegn не работает, SSH

ответ

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