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mrzhouhibernate
 Post subject: composite key many-to-one question???
PostPosted: Wed Oct 04, 2006 10:43 am 
Newbie

Joined: Fri Sep 15, 2006 12:00 am
Posts: 2
create table TAA(
FAID int,
FAID2 int,
FaName varchar(50),
CONSTRAINT PK_AA PRIMARY KEY (FAID,FAID2)
)

create table TBB(
FBID int,
FAID int,
FAID2 int,
FbName varchar(50),
constraint PK_BB primary key (FBID),
CONSTRAINT FK_B_A FOREIGN KEY (FAID,fAId2) REFERENCES TAA(FAID,faId2)
)
I have two tables, use composite key, there is a problem in the table TBB mapping XML
the table TAA is right.

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

<hibernate-mapping package="cn.miw">
<class name="Taa" table="TAA" >
<meta attribute="sync-DAO">false</meta>
<composite-id name="Id" class="TAAPK">
<key-property name="Faid2" column="FAID2" type="integer" />
<key-property name="Faid" column="FAID" type="integer" />
</composite-id>

<property
name="FaName" column="FaName" type="string" not-null="false" length="50" />
</class>
</hibernate-mapping>
there is a problem in the table TBB
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

<hibernate-mapping package="cn.miw">
<class name="TBB" table="TBB" >
<meta attribute="sync-DAO">false</meta>
<id name="Id" type="integer" column="FBID" >
<generator class="sequence"/>
</id>

<property name="FbName" column="FbName" type="string" not-null="false" length="50" />
<many-to-one name="Faid2" column="FAID2" class="Taa" not-null="false" ></many-to-one>
<many-to-one name="Faid" column="FAID" class="Taa" not-null="false" ></many-to-one>
</class>
</hibernate-mapping>
the code in red is wrong.
how can I do mapping the TBB???
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mrzhouhibernate
 Post subject: Re: composite key many-to-one question???
PostPosted: Wed Oct 04, 2006 10:54 am 
Newbie

Joined: Fri Sep 15, 2006 12:00 am
Posts: 2
mrzhouhibernate wrote:
create table TAA(
FAID int,
FAID2 int,
FaName varchar(50),
CONSTRAINT PK_AA PRIMARY KEY (FAID,FAID2)
)

create table TBB(
FBID int,
FAID int,
FAID2 int,
FbName varchar(50),
constraint PK_BB primary key (FBID),
CONSTRAINT FK_B_A FOREIGN KEY (FAID,fAId2) REFERENCES TAA(FAID,faId2)
)
I have two tables, use composite key, there is a problem in the table TBB mapping XML
the table TAA is right.

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

<hibernate-mapping package="cn.miw">
<class name="Taa" table="TAA" >
<meta attribute="sync-DAO">false</meta>
<composite-id name="Id" class="TAAPK">
<key-property name="Faid2" column="FAID2" type="integer" />
<key-property name="Faid" column="FAID" type="integer" />
</composite-id>

<property
name="FaName" column="FaName" type="string" not-null="false" length="50" />
</class>
</hibernate-mapping>
there is a problem in the table TBB
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

<hibernate-mapping package="cn.miw">
<class name="TBB" table="TBB" >
<meta attribute="sync-DAO">false</meta>
<id name="Id" type="integer" column="FBID" >
<generator class="sequence"/>
</id>

<property name="FbName" column="FbName" type="string" not-null="false" length="50" />
<many-to-one name="Faid2" column="FAID2" class="Taa" not-null="false" ></many-to-one>
<many-to-one name="Faid" column="FAID" class="Taa" not-null="false" ></many-to-one>
</class>
</hibernate-mapping>
the code in red is wrong.
how can I do mapping the TBB???


and how can build the set in TAA?
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JayeshJ
 Post subject:
PostPosted: Thu Oct 05, 2006 2:19 am 
Regular
Regular

Joined: Tue May 16, 2006 3:32 am
Posts: 117
Use the following mapping style for composite keys:

Code:
many-to-one:

<many-to-one name="person"  class="Person">
    <column name="firstName"/>
    <column name="initial"/>
    <column name="lastName"/>
</many-to-one>



Set:

<set name="persons" inverse="true">
    <key>
         <column name="firstName"/>
         <column name="initial"/>
         <column name="lastName"/>
    </key>

    <one-to-many class="Person"/>
</set>
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 Profile  
 
Frodogus
 Post subject:
PostPosted: Tue Oct 17, 2006 5:30 am 
Newbie

Joined: Fri Jul 07, 2006 3:39 am
Posts: 4
I have try this but dont work.

Error is "must have same number of columns as the referenced primary key".

I use your example for my project.

Can you help me?
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