Why isn't my liquid code working in Flow?

5 0 3

Can anyone tell me why this code refuses to be accepted by Shopify Flow please?


{% for line_item in order.line_items %}
{% if line_item.product.metafields.availability contains 'NOT Available' or line_item.product.metafields.logistics contains 'Item is not available to order' %}
{% endif %}
{% endfor %}


I get the error:


  • "line_items" is invalid. Replace this variable.
Replies 3 (3)

Shopify Staff
2055 224 326

Hey @vanillamt,


It looks like the error message is indicating that the variable "line_items" is not valid and needs to be replaced.


Some possible causes of this error could include:

  • "line_items" is not a valid variable within the context of your code
  • There is a typo in the variable name, and it should be "line_item" instead
  • You are using an outdated version of Shopify's Liquid template language and the variable name has been changed or deprecated.


I would recommend double-checking the variable name and making sure it is spelled correctly and that it is a valid variable in the context of your code. Also, check the version of the liquid template, if it is outdated, update it. Also, you can check Shopify's documentation for the version you're using to ensure that the variable is still supported.

Moira | Social Care @ Shopify
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Shopify Partner
47 0 9

Same problem with this code 

  • {% for item in order.lineItems_item %} {% if item.title contains 'XX' %} {% assign aa= item.variant.options[0] %} {% assign bb= item.variant.options[1] %} {% assign cc= item.variant.options[2] %} XX{{ aa }}_{{ bb}}_{{ cc}} {% endif %} {% endfor %}
Shopify Staff
1015 133 243

So first, Flow liquid is not same as storefront liquid (see https://help.shopify.com/en/manual/shopify-flow/reference/variables). Use "Add a variable" to gauge the syntax. So "order.line_items" is "order.lineItems" in Flow. 


Second, you cannot access array items that way, like "item.variants.options[1]". You can loop over arrays to get their items.


Finally, I'm not sure where you got "order.lineItems_item" but that's not a field name. To access lineItems, typically you would use this loop:

{% for li in order.lineItems %}
{% if li.title == "something" %}
print out something
{% endif %}
{% endfor %}


Paul_N | Flow Product Manager @ Shopify
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