Asynchronous callback - gwt
- by sprasad12
Hi,
I am using gwt and postgres for my project. On the front end i have few widgets whose data i am trying to save on to tables at the back-end when i click on "save project" button(this also takes the name for the created project).
In the asynchronous callback part i am setting more than one table. But it is not sending the data properly. I am getting the following error:
org.postgresql.util.PSQLException: ERROR: insert or update on table "entitytype" violates foreign key constraint "entitytype_pname_fkey"
Detail: Key (pname)=(Project Name) is not present in table "project".
But when i do the select statement on project table i can see that the project name is present.
Here is how the callback part looks like:
oksave.addClickHandler(new ClickHandler(){
@Override
public void onClick(ClickEvent event) {
if(erasync == null)
erasync = GWT.create(EntityRelationService.class);
AsyncCallback<Void> callback = new AsyncCallback<Void>(){
@Override
public void onFailure(Throwable caught) {
}
@Override
public void onSuccess(Void result){ }
};
erasync.setProjects(projectname, callback);
for(int i = 0; i < boundaryPanel.getWidgetCount(); i++){
top = new Integer(boundaryPanel.getWidget(i).getAbsoluteTop()).toString();
left = new Integer(boundaryPanel.getWidget(i).getAbsoluteLeft()).toString();
if(widgetTitle.startsWith("ATTR")){
type = "regular";
erasync.setEntityAttribute(name1, name, type, top, left, projectname, callback);
} else{
erasync.setEntityType(name, top, left, projectname, callback);
}
}
}
Question:
Is it wrong to set more than one in the asynchronous callback where all the other tables are dependent on a particular table?
when i say setProjects in the above code isn't it first completed and then moved on to the next one?
Please any input will be greatly appreciated.
Thank you.
