Order Confirmation Email: Detecting if a BookThatApp Product is purchased

🛍️ Overview
This article describes the scenario where you want to add custom text to the Shopify order confirmation email when the order includes a BookThatApp (BTA) product.

💡 Tip: You can use the following Liquid code to check whether an order contains a BTA product:

{% assign bta = 'false' %}
{% for line in subtotal_line_items %}
  {% if line.product.metafields.bookthatapp.config %}
    {% assign bta = 'true' %}
  {% endif %}
{% endfor %}

{% if bta == 'true' %}
  <p>this note will only be shown if a BookThatApp product is in the order</p>
{% endif %}