Hidden variable passed in via Sprig 'does not exist' when set to a comma seperated string.

Question

I am trying to pass in a hidden variable passed in via Sprig. However, I am getting back the error that _sections 'does not exist' when _sections is set to a comma separated string and passed into the sprig template.

Here is a shortened version of my code:

template.twig

{% set sections = ['features', 'blog', 'researchPapers'] %}

{{ sprig('_includes/_sprig/search-megamenu.twig', {
  _sections: sections|join(','),
  nameSpace: 'technical',
  placeholderText: 'Search technical articles',
  allOptionsLabel: 'All Sections'
}) }}

sprig.twig

{% set section = section ?? '' %}

{% set alllowedSectionHandles = _sections|split(',') %}
{% set allowedSections = alllowedSectionHandles|map(handle => craft.app.sections.sectionByHandle(handle)) %}

{% set section = section in alllowedSectionHandles ? section : alllowedSectionHandles %}

  {% if alllowedSectionHandles %}
    <div>
      <label for="section" class="sr-only">Directory</label>
      <div class="max-w-lg rounded-md shadow-sm sm:max-w-xs">
        <select
          sprig
          id="section"
          name="section"
          class="pr-6 {{ classes.input }}"
        >
          <option value="">All Sections</option>
           {% for allowedSection in allowedSections %} 
           <option value="{{ allowedSection.handle }}" {{ allowedSection.handle == section ? 'selected' }}> 
           {{ allowedSection.name }} 
           </option> 
           {% endfor %} 
        </select>
      </div>
    </div>
  {% endif %}

When I dump dd(_sections) I get the array outputted. if I pass in just a single string as _section. All is ok and works.

What am I doing wrong?

[bencroker]

No problem and good luck!

[terryupton]

@bencroker - I think I have found the problem (me). I have stripped it all down and your code is working just fine. I am working on rebuilding it back up and I think the problem is a result of an include I had not updated yet (doh). I will test and reveal shortly. But I think this is the cause. Apologies for taking up your time…