How to add entry into database automatically

Support
#1

Hey,

I have an application that consist of 2 entities and. The 2 entities are called Meeting and Participant.

The Meeting Entity:

image

The Participant entity:

image

What code can i use to automatically add the user who created the meeting as a participant of the meeting that has been created. The participant entry should be linked to the meeting that has just been created through the meeting_id attribute.

Regards

#2

Hey!

Add new field participants (composition) to Meeting entity (one-to-many).

Add to meeting editor new nested collectionDataSource paticipantsDs use new field.

Inject to editor screenController this datasource.

Use preCommit() method in Meeting editor screen controller.

 @Inject
protected CollectionDatasource<Participant, UUID> paticipantsDs;

@Override
protected boolean preCommit() {
    Participant participant = metadata.create(Participant.class);
    participant.setMeeting_id(getItem());
    participant.setName(UserSession.getCurrentOrSubstitutedUser());
    //set other entity fields
    
    paticipantsDs.add(participant);
    return true;
}
#3

Hey,

It giving a null NullPointerException when you click OK to create the meeting.

image

Regards

#4

Hey, Susan!

Most likely you need to inject metadata into the screen controller

@Inject
protected Metadata metadata;

or post source code your meeting editor screen controller.

#5

Hey,

Here is the source code in my meeting editor screen controller.

       package com.company.agenda.web.meeting;

    import java.util.Map;
    import java.util.UUID;

    import javax.inject.Inject;

    import com.company.agenda.entity.Meeting;
    import com.company.agenda.entity.Part_Type;
    import com.company.agenda.entity.Participant;
    import com.company.agenda.service.AgendaService;
    import com.haulmont.cuba.gui.components.AbstractEditor;
    import com.haulmont.cuba.gui.data.CollectionDatasource;
    import com.haulmont.cuba.security.entity.User;
    import com.haulmont.cuba.security.global.UserSession;
    import com.vaadin.ui.Notification.Type;
    import com.haulmont.cuba.core.global.Metadata;

    public class MeetingEdit extends AbstractEditor<Meeting> 
    {
    	//@Inject
    	//WindowActionsFrame windowActions;
    	//@Inject	
    @Inject
    	private UserSession userSession;
	
	 @Inject
	 private Metadata metadata;
	
	 @Inject
	 private AgendaService agenda;
	 
	 @Inject
	 protected CollectionDatasource<Participant, UUID> paticipantsDs;
	 
	 @Inject 
	 private Part_Type part_type;

	public void init (Map<String , Object> param)
	{
		
		//addCloseListener(null);
	}
	
	
	
	
	@Override
	protected boolean preCommit()
	{
	    Participant participant = metadata.create(Participant.class);
	    participant.setMeeting_id(getItem());
	    participant.setName(userSession.getCurrentOrSubstitutedUser());
	    participant.setType(part_type.Secretary);
	    //set other entity fields
	    
	    paticipantsDs.add(participant);//.add(participant);
	    return true;
	}

    public void onAddBtnClick() 
    {
    	
    	//User user = userSession.getSubstitutedUser();
    	
    	
    	    	
    	
    	getDsContext().commit();
    	//Meeting meeting = null;
    	//agenda.DefaultParticipant(user, meeting);//Part_Type pt = null;
    	
	    this.commitAndClose();   
	    
    }

    public void onCancelBtnClick() 
    {
    	this.close(CLOSE_ACTION_ID);
    }
}

Regards,

#6

Susan.
part_type is enum?

#7

Hey,

Yes it is

Regards,

#8

Hey!

Remove this. Enum can be used without injection.