how to update database fields by checking the success of sending email? - google-app-maker

Question

I am trying to make a form in google app maker. I've created a form. which has a "preview(save" button, It will create a new item and I have a field named "status". The default value of this field is "draft". In the next page I have a "sent email" button. This page won't create any new item. It'll send the email and if the email deliver is successful then it'll update the field of status from "draft" to "completed"
This is my client script
function sendMessage(to, subject, msg){
// some part is omitted
var status = app.popups.NotificationDialog.descendants.notificationText;
var success = app.datasources.ChangeSystem;
google.script.run
.withFailureHandler(function(error){
// success.Success = "draft"
status.text = error.message;
})
.withSuccessHandler(function(result){
status.text = 'sent';
success.Success = "completed";
clearEmailForm();
})
.sendEmailMessage(to, subject, msg);
}
and this is my email sent button function
var widgets = app.pages.Email.descendants;
var to;
var subject = widgets.systemName.value
var msg = "Description:\n\t\t" + widgets.Objective.value;
widgets.EmailStatus.text = 'Sending email...';
sendMessage(to, subject, msg);
So far I am successful to send the email also I have created and saved all fields. But the problem is after sending the email the "status" field doesn't update. It remains the same as default value "draft". my expected result is after pressing the send button it will update one of the existing fields.

Answer 1

After some additional thinking on this topic I think I found the problem. Here is some updated code assuming your send email button is the same inherited datasource as the field that you are trying to update.
var success = widget.datasource.item;
google.script.run
.withFailureHandler(function(error)
status.text = error.message;
success.Success = 'draft';
})
.withSuccessHandler(function(result) {
status.text = 'Email sent';
success.Success = 'completed';
clearEmailForm();
})
.sendEmailMessage(to,subject, msg);