Vulcan/client/views/admin/settings.js

var settingsForm;

Template.settings.helpers({
  generateSettingsForm: function (setting) {
    Meteor.defer(function() {
      settingsForm = new DatabaseForm();
      settingsForm.generateFor(setting, '#json-form');
    })  
  },
  noSettings: function(){
    if (Settings.findOne()) {
      return false;
    }
    return true;
  },
  setting: function(){
    var setting = Settings.find().fetch()[0];
    return new Setting(setting) || new Setting();
  }
});

Template.settings.events({
  'click input[type=submit]': function(e){
    e.preventDefault();
    if(!Meteor.user()) throw 'You must be logged in.';

    settingsForm.submit(
      function(){
        throwError("Settings have been created");
      },
      function(error) {
        if(error)
          console.log(error);
        throwError("Settings have been updated");

      }
    );
  }
});