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Unexpected Liquid 'or' operator behavior

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Posted on by gwct

Hi there,

I'm wondering if this is the intended behavior for liquid `or` operator, as this had made me spend hours to debug a thing that I was working on.

Basically, the behavior that I find confusing is:

true or false evaluated into true, while
false or true evaluated into false

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soundharya 249 on at

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You have to use if condition
{% if product.type == "Shirt" or product.type == "Shoes" %} This is a shirt or a pair of shoes. {% endif %}

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Fubar 8,338 Super User 2025 Season 2 on at

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{{...}} is not the same as {%.....%} . In your case using the {{ it may just be outputting the first word it sees inside the {{ and not actually evaluating anything.

{% if true or false %}true {% else %}false {% endif %} {% if false or true %} true {% else %}false {% endif %} {% if true and true %} true {% else %} false {% endif %} {% if false and true %} true {% else %} false {% endif %} {% if false and false %} true {% else %}false {% endif %} Outputs true true true false false

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gwct 12 on at

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Ah okay, now that I've checked again that {{ }} and {% %} do behave differently.
And I think the behavior for {{ }} is similar to what can be found in {% assign varA = ... %} where the right side of the assignment just tries to grab the whatever on the leftmost side of the operation is it?

I found the problem first time when i was trying to store the value of some boolean operation into a variable, where the operation results ends up around {% assign varA = false or false or true %} and it ends up storing false, that's why i was confused with the behavior

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Fubar 8,338 Super User 2025 Season 2 on at

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Yes, there can also be some fun stuff if it is multiple logical operators - its not really documented in the portal doco but there is a little bit more in the Shopify doco under Order of Operations https://shopify.github.io/liquid/basics/operators/ (Liquid originates from Shopify who open sourced it)

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