休眠：二許多一對一的關係

我有三個表：用戶 - >簡介 - > ProfileDetails休眠：二許多一對一的關係

用戶必須在個人資料表中的一行

檔案必須在ProfileDetails表

一行

CREATE TABLE IF NOT EXISTS mydb.User (
    id INT NOT NULL AUTO_INCREMENT, 
    name VARCHAR(45) NULL, 
    PRIMARY KEY (id)) 
ENGINE = InnoDB; 

CREATE TABLE IF NOT EXISTS mydb.Profile (
    userId INT NOT NULL, 
    profileData VARCHAR(45) NULL) 
ENGINE = InnoDB; 

CREATE TABLE IF NOT EXISTS mydb.ProfileDetails (
    profileId INT NOT NULL, 
    details VARCHAR(45) NULL) 
ENGINE = InnoDB;

如何使用一對一關係在hbm.xml文件中描述所有這些關係？

來源

2015-07-21 jonua

我解決了這個問題。我用的是主鍵關係：

CREATE TABLE IF NOT EXISTS mydb.User (
    id INT NOT NULL, 
    name VARCHAR(45) NULL, 
    PRIMARY KEY (id)) 
ENGINE = InnoDB; 

CREATE TABLE IF NOT EXISTS mydb.Profile (
    user_id INT NOT NULL, 
    profile_data VARCHAR(45) NULL, 
    PRIMARY KEY (user_id), 
    CONSTRAINT fk_Profile_User1 
    FOREIGN KEY (user_id) 
    REFERENCES mydb.User (id) 
    ON DELETE NO ACTION 
    ON UPDATE NO ACTION) 
ENGINE = InnoDB; 

CREATE TABLE IF NOT EXISTS mydb.ProfileDetails (
    profile_id INT NOT NULL, 
    details INT NOT NULL, 
    PRIMARY KEY (profile_id, details), 
    INDEX fk_ProfileDetails_Profile1_idx (profile_id ASC), 
    CONSTRAINT fk_ProfileDetails_Profile1 
    FOREIGN KEY (profile_id) 
    REFERENCES mydb.Profile (user_id) 
    ON DELETE NO ACTION 
    ON UPDATE NO ACTION) 
ENGINE = InnoDB;

和未來的hbm.xml映射：

User.hbm.xml

<?xml version="1.0" encoding="utf-8"?> 
<!DOCTYPE hibernate-mapping PUBLIC 
     "-//Hibernate/Hibernate Mapping DTD//EN" 
     "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 
<hibernate-mapping> 
    <class name="ru.myapp.User" table="User"> 
     <id name="id" column="id" type="long"> 
      <generator class="native" /> 
     </id> 

     <property name="name" column="name" type="string" /> 

     <one-to-one name="profile" class="ru.myapp.Profile" /> 
    </class> 
</hibernate-mapping>

Profile.hbm.xml

<?xml version="1.0" encoding="utf-8"?> 
<!DOCTYPE hibernate-mapping PUBLIC 
     "-//Hibernate/Hibernate Mapping DTD//EN" 
     "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 
<hibernate-mapping> 
    <class name="ru.myapp.Profile" table="Profile"> 
     <id name="id" column="user_id" type="long"> 
      <generator class="foreign"> 
       <param name="property">user</param> 
      </generator> 
     </id> 

     <property name="profileData" column="profile_data" type="string" /> 

     <one-to-one name="user" class="ru.myapp.User" /> 
     <one-to-one name="profileDetails" class="ru.myapp.profileDetails" /> 
    </class> 
</hibernate-mapping>

ProfileDetails.hbm.xml

<?xml version="1.0" encoding="utf-8"?> 
<!DOCTYPE hibernate-mapping PUBLIC 
     "-//Hibernate/Hibernate Mapping DTD//EN" 
     "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 
<hibernate-mapping> 
    <class name="ru.myapp.ProfileDetails" table="ProfileDetails"> 
     <id name="id" column="profile_id" type="long"> 
      <generator class="foreign"> 
       <param name="property">profile</param> 
      </generator> 
     </id> 

     <property name="details" column="details" type="string" /> 

     <one-to-one name="profile" class="ru.myapp.Profile" /> 
    </class> 
</hibernate-mapping>

來源

2015-07-21 22:46:31 jonua

休眠：二許多一對一的關係

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