How to write a segment that is not two other segments

Question

How can I write:

• is segment 3, and is not itemA and is not itemB?
• both itemA and itemB are segment 3 as well.

{% if craft.app.request.getSegment(3) and craft.request.getSegment(3) !== 'itemA' and craft.request.getSegment(3) !== 'itemB' %}

To clarify, I want to target a category that is segment 3, but I want to omit two other categories that are on the same segment(level):

• Topics Category
  • Subcategory
  • Subcategory
    • itemA(omit)
    • itemB(omit)
    • itemC(yes)
    • itemD(yes)

In code, I want to achieve this:

{% if craft.request.getSegment(2) == 'Subcategory' %}
   // do something
{% elseif craft.app.request.getSegment(3) and craft.request.getSegment(3) !== 'itemA' and craft.request.getSegment(3) !== 'itemB' %}
   // do other stuff
{% else %}
   // do a generic thing
{% endif %}

Answer 1

I personally try to avoid inlining too many conditionals because I feel like it leaves room for logical loopholes. I also think using variables for segments keeps things easier to read.

{% set seg2 = craft.request.getSegment(2) %}
{% set seg3 = craft.request.getSegment(3) %}

So maybe something like this? The keyword in is Twig's way of checking in_array()

{% set badItems = ['itemA', 'itemB'] %}

{% if seg2 == 'Subcategory' %}
    // do top priority thing
{% elseif seg3 != '' and seg3 not in badItems %}
    // do secondary thing
{% else %}
    // do overall default thing
{% endif %}

---

However, if you know the finite list of acceptable items beforehand, I think this is more concise. Since segment 3 could be blank if it's not there, maybe try checking if it is something instead of if it's not something.

{% set goodItems = ['itemC', 'itemD'] %}

{% if seg2 == 'Subcategory' %}
    // do top priority thing
{% elseif seg3 in goodItems %}
    // do secondary thing
{% else %}
    // do overall default thing
{% endif %}