Can we use filters in IF, FOR or CASE tags?

[QuanWanxx]

Hi,

From the Liquid wiki spec Liquid-For-Designers, the <CONDITION> in {% if <CONDITION> %} ... {% endif %} "should be either a normal Liquid expression or a comparison using Liquid expressions".

Does filters output belongs to Liquid expressions? For example, I want to directly check the condition using where filter in if, when exist products that "type" is "kitchen" then display.

{% if products | where: "type", "kitchen" %}
  Hello!
{% endif %}

This liquid example will always display as long as products is not empty, where takes no effects.

Am I must to assign the filters output to an variable, then can use it in if, for or case tags?

[dylanahsmith]

Filters are only supported on a subset of tags (e.g. assign tag), which don't include if, for or case tags. A liquid expression refers to what would come before the pipe symbol in a variable tag (e.g. {{ some_expression | some_filters }}.

Using an assign tag is indeed the way this can be accomplished.

[QuanWanxx]

Got it, thanks for your explanation.