Shopify order printer app packing slips with bin locations (using metafields)

packing-slip.liquid

<div>
  <div class="columns">
    <h1>Packing Slip</h1>
    <div class="address">
      <p style="text-align: right; margin: 0">
        Order {{ order.order_name }}<br />
        {% if order.po_number %}PO # {{ order.po_number }}<br />{% endif %} {{
        order.created_at | date: "%B %e, %Y" }}
      </p>
    </div>
  </div>
  <div class="columns" style="margin-top: 1.5em">
    <div class="address">
      <strong>From</strong><br />
      {{ shop.name }}<br />
      {{ shop.address | format_address }}
    </div>
    {% if order.shipping_address %}
    <div class="address">
      <strong>Ship to</strong>
      {{ order.shipping_address | format_address }}
    </div>
    {% endif %}
  </div>
  <hr />
  <h2>Order Details</h2>
  <table class="table-tabular" style="margin: 1em 0 0 0">
    <thead>
      <tr>
        <th style="width: 15%; text-align: left">Qty</th>
        <th style="width: 15%; text-align: left">Bin Location</th>
        <th style="width: 70%; text-align: left">Item</th>
      </tr>
    </thead>
    <tbody>
      {% for line_item in order.line_items %}
      <tr>
        <td style="text-align: left">{{ line_item.quantity }}</td>

        <td style="text-align: left">
          {% assign variant_bin =
          line_item.variant.metafields.inventory.stock_location_variant %} {%
          assign product_bin =
          line_item.product.metafields.inventory.stock_location %} {% assign
          bin_location = variant_bin | default: product_bin %}
          {% if bin_location != blank %} {{ bin_location }} {% endif %}
        </td>

        <td style="text-align: left">{{ line_item.title }}</td>
      </tr>
      {% endfor %}
    </tbody>
  </table>
</div>