README

Two field types for Craft CMS that:

• lets you select one or more Category Groups.
• lets you select one or more Categories from one or more Category Groups.

Install

1. Add the repo to your project and install via Composer:

cd /path/to/project

composer require delaneymethod/category-groups && php craft plugin/install category-groups

Usage

CategoryGroupField

• In the dropdown/radio buttons mode your field normalizes to a CategoryGroup|null.
• In checkbox mode you return an array<CategoryGroup>.

Print the selected group name(s):

{% set fieldValue = entry.myCategoryGroupsFieldHandle ?? null %}
{% if fieldValue %}
	{% if fieldValue is instance of('craft\\models\\CategoryGroup') %}
		<p>Selected category group: {{ fieldValue.name }}</p>
	{% elseif fieldValue is iterable %}
		<p>Selected category groups:</p>
		<ul>
			{% for categoryGroup in fieldValue %}
				<li>{{ categoryGroup.name }}</li>
			{% endfor %}
		</ul>
	{% elseif fieldValue is string %}
		{% set categoryGroup = craft.app.categories.getGroupByUid(fieldValue) %}
		{% if categoryGroup %}
			<p>Selected category group: {{ categoryGroup.name }}</p>
		{% endif %}
	{% else %}
		<p>No category group selected.</p>
	{% endif %}
{% else %}
	<p>No category groups selected.</p>
{% endif %}

Use the selected category group to list its categories (current site)

{% if fieldValue is instance of('craft\\models\\CategoryGroup') %}
	{% set categories = craft.categories().groupId(fieldValue.id).siteId(craft.app.sites.currentSite.id).status(null).orderBy('title asc').all() %}
	{% if categories %}
		<h4>Category group: {{ fieldValue.name }}</h4>
		<ul>
			{% for category in categories %}
				<li><a href="{{ category.url }}">{{ category.title }}</a></li>
			{% endfor %}
		</ul>
	{% else %}
		<p><em>No categories found in {{ fieldValue.name }}.</em></p>
	{% endif %}
{% elseif fieldValue is iterable %}
	{% for categoryGroup in fieldValue %}
		{% set categories = craft.categories().groupId(categoryGroup.id).siteId(craft.app.sites.currentSite.id).status(null).orderBy('title asc').all() %}
		{% if categories %}
			<h4>Category group: {{ categoryGroup.uid }}</h4>
			<ul>
				{% for category in categories %}
					<li><a href="{{ category.url }}">{{ category.title }}</a></li>
				{% endfor %}
			</ul>
		{% else %}
			<p><em>No categories found in {{ categoryGroup.name }}.</em></p>
		{% endif %}
	{% endfor %}
{% elseif fieldValue is string %}
	{% set categoryGroup = craft.app.categories.getGroupByUid(fieldValue) %}
	{% if categoryGroup %}
		{% set categories = craft.categories().groupId(categoryGroup.id).siteId(craft.app.sites.currentSite.id).status(null).orderBy('title asc').all() %}
		{% if categories %}
			<h4>Category group: {{ categoryGroup.name }}</h4>
			<ul>
				{% for category in categories %}
					<li><a href="{{ category.url }}">{{ category.title }}</a></li>
				{% endfor %}
			</ul>
		{% else %}
			<p><em>No categories found for {{ categoryGroup.name }}.</em></p>
		{% endif %}
	{% else %}
		<p><em>No category group found for {{ fieldValue }}.</em></p>
	{% endif %}
{% endif %}

CategoryGroupsField

• Normalizes to a CategoryQuery.
• You can iterate, count, limit, etc.

List selected categories (title + group)

{% set categoryQuery = entry.myCategoryMultipleGroupsFieldHandle ?? null %}
{% if categoryQuery %}
	{% set categories = categoryQuery.status(null).all() %}
	{% if categories %}
		<ul>
			{% for category in categories %}
				<li><a href="{{ category.url }}">{{ category.title }}</a> ({{ category.group.name }})</li>
			{% endfor %}
		</ul>
	{% else %}
		<p>No categories selected.</p>
	{% endif %}
{% else %}
	<p>No categories selected.</p>
{% endif %}

Count / limit / paginate

{% set categoryQuery = entry.myCategoryMultipleGroupsFieldHandle ?? null %}
{% if categoryQuery %}
	{% set count = categoryQuery.count() }}
	{% if count > 1 %}
		<p>{{ count }} categories selected.</p>
	{% else %}
		<p>1 category selected.</p>
	{% endif %}
	
	{% set firstFiveCategories = categoryQuery.status(null).limit(5).all() %}
	{% if firstFiveCategories %}
		<p>First five categories:</p>
		<ul>
			{% for category in firstFiveCategories %}
				<li><a href="{{ category.url }}">{{ category.title }}</a></li>
			{% endfor %}
		</ul>
	{% endif %}
{% endif %}