hibernate 级联插入

映射文件见上一篇《hibernate 级联删除》

 

 

 

插入时候报错：

 

 

 

org.springframework.jdbc.UncategorizedSQLException: Hibernate operation: could not insert: [com.hotel.dao.Movie]; uncategorized SQLException for SQL [insert into hotel.movie (moviename, moviename_sys, director, impersonator, charge, intro, imgsrc, field1, field2) values (?, ?, ?, ?, ?, ?, ?, ?, ?)]; SQL state [HY000]; error code [1364]; Field 'id_movietype' doesn't have a default value; nested exception is java.sql.SQLException: Field 'id_movietype' doesn't have a default value
Caused by: java.sql.SQLException: Field 'id_movietype' doesn't have a default value

 

 

生成sql时id_movietype没有值，重新翻书查找了一下原因，是这里的多方的配置文件有问题：

配置了many-to-one 的 movietype 属性以后就应该删除idmovietype 属性。

 

 

修改后仍然是报上面的错误，再来查查hibernate的insert 属性文档：

 

写道

 

update, insert (optional - defaults to true): specifies that the mapped columns should be included in SQL UPDATE and/or INSERT statements. Setting both to false allows a pure "derived" association whose value is initialized from another property that maps to the same column(s), or by a trigger or other application.

 

将insert="false" 属性设置为 true，修改后的映射文件：

 

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 
    Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
    <class name="com.hotel.dao.Movie" table="movie" catalog="hotelfidelio">
        <id name="id" type="java.lang.Integer">
            <column name="id" />
            <generator class="native"></generator>
        </id>
        <property name="moviename" type="java.lang.String">
            <column name="moviename" length="200" not-null="true" />
        </property>
        <property name="movienameSys" type="java.lang.String">
            <column name="moviename_sys" length="300" not-null="true" unique="true" />
        </property>
        <property name="director" type="java.lang.String">
            <column name="director" length="200" />
        </property>
        <property name="impersonator" type="java.lang.String">
            <column name="impersonator" length="200" />
        </property>
        <property name="charge" type="java.lang.Double">
            <column name="charge" precision="22" scale="0" not-null="true" />
        </property>
        <property name="intro" type="java.lang.String">
            <column name="intro" length="16277215" />
        </property>
        <property name="imgsrc" type="java.lang.String">
            <column name="imgsrc" length="300" />
        </property>
        <property name="field1" type="java.lang.String">
            <column name="field1" length="20" />
        </property>
        <property name="field2" type="java.lang.String">
            <column name="field2" length="20" />
        </property>
	    <many-to-one 
	     name="movietype"
	     class="com.hotel.dao.Movietype"
		 column="id_movietype"
		 insert="true"
		 update="false"
	         outer-join="auto"
	   	 fetch="select"
	         access="property"
	         not-null="true"
	         lazy="false"
	     >
	    </many-to-one>
    </class>
</hibernate-mapping>

 

对应的java代码：

	         Movie movie = new Movie();
	         movie.setIntro(intro);
	         movie.setCharge(Double.parseDouble(charge));
	         movie.setDirector(director);
	         movie.setImgsrc(movieimagename_);
	         movie.setImpersonator(impersonator);
	         movie.setIntro(intro);
	         movie.setMoviename(moviename);
	         movie.setMovienameSys(moviename);
	         Movietype mt =  this.movieOperatorInterface.getMovieType(type);
	         movie.setMovietype(mt);
	         this.movieOperatorInterface.saveMovieInfo(movie);

 

 

 

重新测试，问题解决：

Hibernate: insert into hotel.movie (moviename, moviename_sys, director, impersonator, charge, intro, imgsrc, field1, field2, id_movietype) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)

 

 

评论

2 楼 Odysseus_110 2009-08-06  

a597525618 写道

可不可给我详细的讲一下啊？

刚刚看到你的回复，你有哪里不懂？

1 楼 a597525618 2009-08-06  

可不可给我详细的讲一下啊？