Form code:
<section class="membersTitle" >
<label>Date</label>
<select name="fields[parent][]">
{% set entries = craft.entries.section('order').level(1) %}
{% for entry in entries %}
<option value="{{ entry.id }}">{{ entry.title }}</option>
{% endfor %}
</select>
</section>
I want to choose Parent from list, and I want to add the element to parent.
parentIdattribute and you are done. You can as well create a custom query to change all necessary columns by hand but just setting the parentId is the way to go – Robin Schambach Jul 29 '18 at 15:29