Liquid Boolean "not" Operator

[spmclaugh]

Hi. I’m trying to use the Boolean “not” operator in Liquid. It’s not working as expected, and is documented as a supported function in the Liquid Variable Reference. Example:

    {% assign test1 = true not true %}
    {% assign test2 = false not false %}
    {% assign test3 = true not false %}
    {% assign test4 = false not true %}

    {{test1}}
    {{test2}}
    {{test3}}
    {{test4}}

Output:

true
false
true
false

Can anyone explain the proper way to use this operator? I tried with parenthesis, but it only accepts forms like “true not(true)” not “not true” – you seem to always need something on the left and right side of it. Ideas??

[spmclaugh]

I think I figured it out from this post. For anybody who comes across this post in a search, I’ll paste the relevant part:

The assign tag only supports raw booleans (ie. true or false ). Trying to assign a boolean expresion such as:

 {% assign vars = 2 == 1 %} 

inexplicably assigns “2” to vars .

To my knowledge, the only way is to use conditional statement to assign boolean values 😞 , such as follows:

{% assign enable_A=false %}
{% assign enable_B=true %}
{% if page.param1==true or page.param2==true  %}{%assign enable_A=true%}{% endif %}
{% if page.param2==false or enable_A==true    %}{%assign enable_B=false%}{% endif %}