Yassin Hajaj Yassin Hajaj - 6 months ago 67
SQL Question

SQL Error : integrity constraint violation : foreign key no parent

I'm struggling to find what I'm doing wrong with my query.
I did not create the database but here is the structure :

3 TABLES :

vehicule : brand, motor, price, name, id

option : id, description, price

vehicule_option : id_vehicule, id_option

I guess that vehicule_option has 2 foreign keys but I can not find the problem with my addings.
Here's my code which first part works fine :

public boolean create(Vehicule v){
String query = "INSERT INTO vehicule (MARQUE, MOTEUR, PRIX, NOM) VALUES (";
query += v.getMarque().getId() + ", "
+ v.getMoteur().getId() + ", "
+ v.getPrix() + ", \'"
+ v.getNom() + "\');";

for (Option o : v.getOptions()){
query += "INSERT INTO vehicule_option (id_vehicule, id_option) VALUES ("
+ v.getId() + ", " + o.getId() + ");";
}


try{
Statement state = this.connect.createStatement();
ResultSet rs = state.executeQuery(query);
} catch (SQLException e){
e.printStackTrace();
}
return true;
}


So, what I'm doing here is basically INSERT two values into the right columns.
It gives me the following exception :

java.sql.SQLIntegrityConstraintViolationException: integrity constraint violation: foreign key no parent; SYS_FK_10132 table: VEHICULE_OPTION
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCStatement.fetchResult(Unknown Source)
at org.hsqldb.jdbc.JDBCStatement.executeQuery(Unknown Source)
at fr.ocr.sql.DAOVehicule.create(DAOVehicule.java:35)
at fr.ocr.ihm.AddCarDialogBox$1.actionPerformed(AddCarDialogBox.java:151)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: org.hsqldb.HsqlException: integrity constraint violation: foreign key no parent; SYS_FK_10132 table: VEHICULE_OPTION
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.Constraint.getException(Unknown Source)
at org.hsqldb.Constraint.checkInsert(Unknown Source)
at org.hsqldb.StatementDML.performIntegrityChecks(Unknown Source)
at org.hsqldb.StatementDML.insertSingleRow(Unknown Source)
at org.hsqldb.StatementInsert.getResult(Unknown Source)
at org.hsqldb.StatementDMQL.execute(Unknown Source)
at org.hsqldb.Session.executeCompiledStatement(Unknown Source)
at org.hsqldb.Session.executeDirectStatement(Unknown Source)
at org.hsqldb.Session.execute(Unknown Source)
... 40 more

Answer

You just inserted a new vehicule record, so how would you know the id of that record in v.getId()?

You don't, and v.getId() is likely 0, since you're creating a new one.