Form submit error handling

[Tina G]

I have a form that submits to the server. On error: the server has to show the error on the same form.

The following .js file handles form submit:


function doAdd(){
var startIndex=paging.cursor;
var aAddInstanceDlg;
if (!aAddInstanceDlg) {
aAddInstanceDlg = createNewDialog("a-addInstance-dlg");
aAddInstanceDlg.addButton('Reset', resetForm, aAddInstanceDlg);
aAddInstanceDlg.addButton('Save', function() {
// submit now... all the form information are submit to the server
// handle response after that...
if (form_instance_create.isValid()) {
form_instance_create.submit({ // problem here
// params:{prompt_id : editId, prompt_text: text_edit.getValue(), file: engPrompt_edit.getValue()},
params:{prompt_file: engPrompt_tf.getValue()},
waitMsg:'Adding new prompt now...',
reset: false,
failure: function(form_instance_create, action) {
//TBD: Ext.MessageBox.alert('Error Message', action.result.errorInfo);
//remove following 3 lines
//Ext.MessageBox.alert('Confirm', action.result.info);
var errorMsg='<% = (String)request.getSession().getAttribute("error")%>';
alert('error : '+errorMsg);
Ext.MessageBox.alert('Error Message', action.txt);
//aAddInstanceDlg.hide();
prompt_ds.load({params:{start:startIndex, limit:pagesize}});
},
success: function(form_instance_create, action) {
//Ext.MessageBox.alert('Confirm', action.result.info);
aAddInstanceDlg.hide();
prompt_ds.load({params:{start: startIndex, limit: pagesize}});
}
});
}else{
Ext.MessageBox.alert("<img src='../images/exclamation.gif'> Error!", 'Please fix the errors noted.');
}
});
var layout = aAddInstanceDlg.getLayout();
layout.beginUpdate();
layout.add('center', new Ext.ContentPanel('a-addInstance-inner', {title: 'Add Prompt'}));
layout.endUpdate();
aAddInstanceDlg.show();
};
}

I am not using properly the form.submit's failure part.


failure: function(form_instance_create, action

On server side I have a Struts action servlet with a method as follows:


private boolean addPrompt(HttpServletRequest req) {
System.out
.println("PromptAction::addPrompt()::Enter. promptlist size before add="
+ promptList.size());
System.out.println("PromptAction::addPrompt()::id="
+ req.getParameter(Prompt.PROMPT_ID) + ", text="
+ req.getParameter(Prompt.PROMPT_TEXT) + ", file="
+ req.getParameter(Prompt.PROMPT_FILE));
Prompt p = new Prompt(req.getParameter(Prompt.PROMPT_ID), req
.getParameter(Prompt.PROMPT_TEXT), Prompt.PROMPT_CUSTOM);//@@@, req
//@@@ .getParameter(Prompt.PROMPT_FILE));
promptList.put(req.getParameter(Prompt.PROMPT_ID), p);
// System.out.println("PromptServlet::addPrompt()::Exit. promptlist size
// AFTER add="+ promptList.size());
if (req.getParameter(Prompt.PROMPT_TEXT).length() > 5) {
WDTError promptTextError=new WDTError("wdt.107","Prompt Text too long");
req.setAttribute(WDTConstants.WDT_ERROR, promptTextError);
System.out.println("PromptAction::Error : " + promptTextError.getMessage());
logger.error("PromptAction::Error msg=" + promptTextError.getMessage());
return false;
}
else
return true;
}// End "addPrompt"

Right now no error msg is displayed inside the form.
What all changes are needed on client and server for displaying some sort of Ext.message.alert() message?

Inputs welcome.