I'm new to Craft and am trying to set up a condition that will compare the value of a category (entry.position). However, I get this error message:

Object of class Craft\ElementCriteriaModel could not be converted to string

I'm not really sure how to do a textual comparison. The 'position' field is, in my case, a category. How would a comparison be achieved?

I've tried this:

{% set entry_pos = entry.position %}
{#   {%  craft.categories.slug('position') %} #}                 
{{ entry_pos }}

{% if entry.position != 'staff' %}
    {% if entry.UBFUserName != '' %}
        {% set name_var = entry.UBFUserName %}
            {{ craft.aitest.AiTestVariable(name_var) }}
        {% else %}
    {% endif %}      
{% endif %}

Your entry_pos is an Element Criteria Model. You want to get the first (and probably only) category from this ElementCriteriaModel, and then compare its title to 'staff':

{% set entry_pos = entry.position.first %}
{% if entry_pos.title == 'staff' %}
{% endif %}

This will give you an error if there is no entry.position.first, as entry_pos will be null, so you should defend against that somehow. One possility is:

{% if entry_pos and entry_pos.title == 'staff' %} ...

Another is to use twigs useful null-coalescing operator:

{% if (entry_pos.title ?? '') == 'staff' %} ...

With Craft 3, you will use one instead of first, but otherwise everything is the same.

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  • Would parentheses be needed in the compound conditional statement (above)? For some reason, the if/then statement is returning 'yes' to both 'staff' and 'faculty'. – buck1112 Apr 12 '18 at 16:14
  • I'm not sure if the ()'s are needed - depends on twig operator precedence. – Marion Newlevant Apr 13 '18 at 11:06
  • Thanks. That did the job - I added 'lower' to it to fix the remainder of the problem. {% if entry_pos and (entry_pos.title|lower != 'staff') %} – buck1112 Apr 20 '18 at 21:02

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