3

I have a category listing template where I'm having trouble passing in some variables.

top of the template I have this snippet where I'll set the channel and category field name based on the segment

{% set segment = craft.request.segment(1) %}

{# set channel based on segment_1 #}
{% if segment == "business-intel" %}
    {% set channelName = "businessIntel" %}
    {% set categoryName = "businessIntelCategories" %}
{% elseif segment == "foo" %}
    {# do nothing #}
{% endif %}
{# end set channel #}

Then further down the template I have this:

{% include ('_includes/cat_sub_with_article') with { 'categoryName' : categoryName } %}

And then the included template looks like this:

 {% for category, catEntries in entries | group('categoryName.first().title') %}
    <h2>{{ category }}</h2>


    {% set featuredThumb = {
        mode: 'crop',
        width: 370,
        height: 168,
        quality: 90,
        position: 'top-center'
      } %}

    <div class="article-cards">
        {% for entry in catEntries %}
        <div class="article-card__wrapper">
            <a href="{{ entry.url }}" class="article-card">

                {% set image = entry.featuredImage.first() %}

                <span class="article-card__image">
                    <img src="{{ image.url(featuredThumb) }}" />
                </span>
                <span class="article-card__text">
                    <span class="article-card__category">{{ entry.postDate.format('M d, Y') }}</span>
                    <h3 class="article-card__title">{{ entry.title }}</h3>
                    <p>{{ entry.featuredSummary }}</p>
                    <p><span class="link--green" href="{{ entry.url }}">Learn More</span></p>
                </span>
            </a>
        </div>
        {% endfor %}
    </div><!-- /.article-cards -->
 {% endfor %}

If I hardcode the category field name into line 1 of the above block everything works. However if I try to use the passed varialbe. I get this error, which I don't know how to fix:

Craft\EntryModel and its behaviors do not have a method or closure named "categoryName".

3

You set the variable that your are passing in to your include to a string. And in your include you try to access it like an object.

The variable which you’re passing in to your include is set to a string 'businessIntelCategories'. And in your include you try access a object property dynamically using that string which doesn’t work.

Use this code instead.

{% set entriesGrouped = entries|group('{ object[categoryName].first().title }') %}

Here’s an attempt to explain the syntax.

First you should have a look at the Craft documentation for Dynamic Entry Titles. You see that you can dynamically generate titles with a normal Twig template {{ object.property }} or a special shortcut syntax {property}.

The group filter uses the same internal functionality to render the string that you pass in as a filter argument group('my twig template string'). The syntax has to be a bit different though, because group already adds one pair of curly braces for you.

So usually you echo the title property like so

{{ object.title }}

and in the context of the group filter you can do both of the following.

{% set entriesGrouped = entries|group('title') %}

{% set entriesGrouped = entries|group('{ object.title }') %}

The first syntax, which uses the shortcut syntax, is documented and fine for most cases. But you can’t use it if you need to do something a bit more advanced, like using a ternary operator or in your case access the object object differently.

So to wrap this up, the syntax for group('{ object[categoryName].first().title }') is confusing. But what it does is to render the following Twig code for each element of your array of entries (each entry is passed in as the variable object).

{{ object[categoryName].first().title }}

If you don’t like the object['propertyName'] syntax, you can use the attribute function instead.

{{ attribute(object, categoryName).first().title }}
  • That worked but I don't understand why. – CreateSean Mar 7 '17 at 14:04

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