Re: [Middlegen-user] middlegen not auto-detecting relations in MySQL

M.-Leander Reimer Thu, 13 Nov 2003 11:48:54 -0800

Hey Tim,

well mySQL itself is clueless about relations, you have to use the InnoDB extension instead!!!!!

CU
Leander

Timothy Peter Cockle wrote:

Thanks for the quick reply I will look into it.
Tim
On Thu, 2003-11-13 at 11:06, Markus H�rnvi wrote:
Hi!

Isn't MySQL clueless about relations? Use PostgreSQL instead perhaps?
Hi,

Does any one else have a problem using MySQL with middlegen?

The relationships are not being detected automatically. I guess I can be
the only one.
Any help greatly appreicated even if it is a simple "It worked fine for
me!"
I create the tables as below:
DROP TABLE IF EXISTS person;
DROP TABLE IF EXISTS information;
DROP TABLE IF EXISTS relationship_type;
DROP TABLE IF EXISTS person_relationship;
DROP TABLE IF EXISTS diary;
DROP TABLE IF EXISTS form;
DROP TABLE IF EXISTS part;
DROP TABLE IF EXISTS question;
DROP TABLE IF EXISTS form_response;
DROP TABLE IF EXISTS wizard;
DROP TABLE IF EXISTS information_request;
CREATE TABLE person(
person_id INT NOT NULL,
//CMP Fields remove to save space PRIMARY KEY( person_id )
);
CREATE TABLE information(
       information_id INT NOT NULL,
       type VARCHAR(255) NOT NULL,
       information VARCHAR(255) NOT NULL,
       person_id_fk INT,
       PRIMARY KEY( information_id ),
       FOREIGN KEY (person_id_fk) REFERENCES person(person_id)
);
CREATE TABLE relationship_type(
       relationship_type_id INT NOT NULL,
       type VARCHAR(255) NOT NULL,
       PRIMARY KEY( relationship_type_id )
);
CREATE TABLE  person_relationship (
       person_relationship_id INT NOT NULL,
       person_id_fk INT,
       relationship_type_id_fk INT,
       PRIMARY KEY(person_relationship_id),
       FOREIGN KEY (person_id_fk) REFERENCES person(person_id),
       FOREIGN KEY (relationship_type_id_fk) REFERENCES
relationship_type(relationship_type_id)
);
CREATE TABLE diary(
       diary_id INT NOT NULL,
//CMP Fields remove to save space
       person_id_fk INT,
       PRIMARY KEY(diary_id),
       FOREIGN KEY (person_id_fk) REFERENCES person(person_id)
);
And run middlegen like this:


<middlegen
appname="${name}"
prefsdir="${src.dir}"
gui="${gui}"
databaseurl="${database.url}"
initialContextFactory="${java.naming.factory.initial}"
providerURL="${java.naming.provider.url}"
datasourceJNDIName="${databaseSource}"
driver="${database.driver}"
username="${database.userid}"
password="${database.password}"
schema=""
>


<many2many>
<tablea name="person">

</tablea>
<jointable name="person_relationship"
generate="false"/>

<tableb name="relationship_type">

</tableb>
</many2many>


<table name="information"/>
<table name="relationship_type"/> <table name="diary"/>
<table name="person"/>

<cmp20
destination="${build.gen-src.dir}"
package="alpha.personEntities"
interfacepackage="alpha.personEntitiesInterfaces"
jndiprefix="${unique.name}"
pkclass="false"
dataobject="false"
viewtype="local"
mergedir="${basedir}/src/middlegen"
readonly="false"
fkcmp="false"
guid="true"
>
<sequenceblock
blocksize="5"
retrycount="2"
table="SEQ_BLOCK"
package="alpha.miscEntities"
interfacepackage="alpha.miscEntitiesInterfaces"
/>
           <jboss/>
        </cmp20>
     </middlegen>
Cheers,

Tim
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Re: [Middlegen-user] middlegen not auto-detecting relations in MySQL

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