gistfile1.txt

  addTask() {
    let id = this.generateId();
    let addModal = this.modalCtrl.create(TasksCreatePage, { 'id': id });
    let self = this;
    addModal.onDidDismiss(item => {
      if (item) {
        item.userId = AWS.config.credentials.identityId;
        item.created = (new Date().getTime() / 1000);
        self.db.getDocumentClient().put({
          'TableName': self.taskTable,
          'Item': item,
          'ConditionExpression': 'attribute_not_exists(id)'
        }, function(err, data) {
          if (err) { console.log(err); }
          self.refreshTasks();
        });
      }
    })
    addModal.present();
  }