Reuse of google form triggers

Question

I automatically create a form with GAS as follows:

 var form = FormApp.create(form_name);

 ScriptApp.newTrigger('mysubmit')
 .forForm(form)
 .onFormSubmit()
 .create();

The problem is that it creates a trigger every time new form is created. Is there a way to reuse the same trigger? A problem is that a number of triggers available to my account runs out very quickly.

Answer 1

My workaroung but still 20 triggers limit exists

function install_submit_trigger(form, fids)
{
  var allTriggers = ScriptApp.getProjectTriggers();
  for(var i = 0; i < allTriggers.length; i++)
  {
    ScriptApp.deleteTrigger(allTriggers[i]);
  }
  for(var i in fids)
  {
    var fid = fids[i]; 
    try
    {
      ScriptApp.newTrigger('mysubmit')
               .forForm(FormApp.openById(fid.fid))
               .onFormSubmit‌​().create();
    }
    catch(e)
    {
      Logger.log("Error adding trigger: " + e);
    }
  }
  ScriptApp.newTrigger('mysubmit') .forForm(form) .onFormSubmit() .create();
}

Answer 2

If you use an Apps Script to create a Form and then create a form submit trigger for that Form, the trigger you have created is attached to the script , not the new Form. This is why you are running into the 20 triggers / user / script quota limit .

Keep in mind that triggers live on scripts, not Docs, Sheets, or Forms. You can use a script to create a new Form, but you can't use a script to create a new script attached to that Form (scripts cannot create other scripts). This means you cannot programmatically create a trigger that lives on another document.

What you can do is create a Forms add-on that, when a new Form is created, a user can hit a menu control to create a form submit trigger for that Form.