Hello list, I've 2 tables
CREATE TABLE c_account( account_id INTEGER DEFAULT 0 NOT NULL, login VARCHAR(100), password VARCHAR(100), PRIMARY KEY (account_id) ) ;
CREATE TABLE fem_employee( account_id INTEGER DEFAULT 0 NOT NULL, first_name VARCHAR(100), last_name VARCHAR(100), PRIMARY KEY (account_id) ) ;
I want to implement the "mapping each class on a distinct table" as in tutorial3 so I write
the descriptor:
<class-descriptor class="allibo.core.Account" table="c_account"> <field-descriptor name="account_id" column="account_id" jdbc-type="INTEGER" primarykey="true" autoincrement="true"/>
<field-descriptor name="login" column="login" jdbc-type="VARCHAR"/>
<field-descriptor name="password" column="password" jdbc-type="VARCHAR"/>
</class-descriptor>
<class-descriptor class="allibo.commerce.Employee" table="fem_employee">
<field-descriptor name="account_id" column="account_id" jdbc-type="INTEGER" primarykey="true" autoincrement="true"/> <field-descriptor name="first_name" column="login" jdbc-type="VARCHAR"/>
<field-descriptor name="last_name" column="password" jdbc-type="VARCHAR"/>
<reference-descriptor name="super" class-ref="allibo.core.Account" auto-retrieve="true" auto-update="true" auto-delete="true">
<foreignkey field-ref="account_id"/>
</reference-descriptor> </class-descriptor>
implemented by the classes
public class Account {
private int account_id;
private String login;
private String password;
/* setter and getter methods*/
}
public class Employee extends Account {
private String first_name;
private String last_name
/* setter and getter methods*/
}OK this is the situation. Now the questions:
When I try to add a new Employee no problem, a row is added to the c_account and fem_employee.
The problem is when I try to delete an Employee:
employee = new Employee();
employee.setAccount_id(employee_id);
Criteria crit = new Criteria();
crit.addEqualTo("account_id" , new Integer(employee_id));
Query query = new QueryByCriteria(employee);
try {
broker.beginTransaction();
broker.delete(employee);
broker.commitTransaction();
} catch (PersistenceBrokerException ex) {
broker.abortTransaction();
System.out.println(ex.getMessage());
ex.printStackTrace();
}
this affect only the fem_employee and not c_account. Is this correct?
In the tutorial3 is written about "mapping each class on a distinct table":
"This is the most simple solution. Just write a complete ClassDescriptor for each class that contains FieldDescriptors for all (also inherited) attributes."
From my point of view this means that my descriptor is wrong and should be:
<class-descriptor class="allibo.commerce.Employee" table="fem_employee">
<field-descriptor name="account_id" column="account_id" jdbc-type="INTEGER" primarykey="true" autoincrement="true"/> <field-descriptor name="first_name" column="login" jdbc-type="VARCHAR"/>
<field-descriptor name="last_name" column="password" jdbc-type="VARCHAR"/>
<field-descriptor name="login" column="login" jdbc-type="VARCHAR"/>
<field-descriptor name="password" column="password" jdbc-type="VARCHAR"/>
<reference-descriptor name="super" class-ref="allibo.core.Account" auto-retrieve="true" auto-update="true" auto-delete="true">
<foreignkey field-ref="account_id"/>
</reference-descriptor> </class-descriptor>
but in this case, when I try to insert an Employee, I've
java.sql.SQLException: Column not found, message from server: "Unknown column 'first_name' in 'field list'"
What is wrong?
Thank you
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