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Integrating Orders API to Allow User Select Tickets for Placing Order in Open Event Frontend

In Open Event Frontend organizer has option to sell tickets for his event. Tickets which are available to public are listed in public page of event for users to buy. In this blog post we will learn how to integrate orders API and manage multiple tickets of varying quantity under an order.

For orders we mainly interact with three API endpoints.

  1. Orders API endpoint
  2. Attendees API endpoint
  3. Tickets API endpoint

Orders and attendees have one to many relationship and similarly orders and tickets also have one to many relationship. Every attendee is related to one ticket. In simple words one attendee has one ticket and one order can contain many tickets of different quantity each meant for different attendee.

// routes/public/index.js

order:'order', {
  event     : eventDetails,
  user      : this.get('authManager.currentUser'),
  tickets   : [],
  attendees : []


We need to create instance of order model to fill in data in that record. We do this in our routes folder of public route. Code snippet is given below.

We create a empty array for tickets and attendees so that we can add their record instances as relationship to order.

As given in screenshot we have a dropdown for each ticket to select quantity of each ticket. To allow user select quantity of a ticket we use #ui-dropdown component of ember-semantic-ui in our template. The code snippet of that is given below.

// templates/components/public/ticket-list.js

{{#ui-dropdown class='compact selection' forceSelection=false onChange=(action 'updateOrder' ticket) as |execute mapper|}}
  {{input type='hidden' id=(concat '_quantity') value=ticket.orderQuantity}}
    <i class="dropdown icon"></i>
class="default text">0
class="item" data-value="{{map-value mapper 0}}">{{0}}
{{#each (range ticket.minOrder ticket.maxOrder) as |count|}}
class="item" data-value="{{map-value mapper count}}">{{count}}
{{/each}} </div> {{/ui-dropdown}}


For every change in quantity of ticket selected we call a action named updateOrder. The code snippet for this action is given below.

// components/public/ticket-list.js

updateOrder(ticket, count) {
      let order = this.get('order');
      ticket.set('orderQuantity', count);
      order.set('amount', this.get('total'));
      if (count > 0) {;
      } else {
        if ( {


Here we can see that if quantity of selected ticket is more than 0 we add that ticket to our order otherwise we remove that ticket from the order if it already exists.

Once user selects his tickets for the order he/she can order the tickets. On clicking Order button we call placeOrder action. With help of this we add all the relations and finally send the order information to the server. Code snippet is given below.

// components/public/ticket-list.js
placeOrder() {
   let order = this.get('order');
   let event = order.get('event'); => {
     let attendee = ticket.orderQuantity;
     let i;
     for (i = 0; i < attendee; i++) {
       order.attendees.addObject('attendee', {
         firstname : 'John',
         lastname  : 'Doe',
         email     : '',


Here for each ticket placed under an order we create a dummy attendee related to ticket and event. And then we call save action to save all the models. Code snippet for save is given:

actions: {
    async save() {
      try {
        this.set('isLoading', true);
        let order = this.get('model.order');
        let attendees = order.get('attendees');
        attendees.forEach(async attendee => {
          .then(order => {
            this.get('notify').success(this.get('l10n').t('Order created.'));
      } catch (e) {
        this.get('notify').error(this.get('l10n').t('Oops something went wrong. Please try again'));


Here we finally save all the models and transition to orders page to enable user fill the attendees details.


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