Show taxonomy terms Grouped By Taxonomy Parent

Lately I was assigned with the task to display all terms assigned to a node, grouped by their parent. To better explain this, let's say for example that we have the Vocabulary 1 assigned to Content Type A, with the following terms:

 

Parent 1

-- term 1

-- term 2

-- term 3

Parent 2

-- term 4

-- term 5

Parent 3

-- term 6

-- term 7

etc. 

 

Nodes from Content Type 1 have various terms assigned. For example, node/143 has the following terms assigned: term 2, term 4, and terms 6 & 7.

 

The requirement was to display the node like this:

 

Node Title

Node Content

Parent 1

-- term 2

Parent 2

-- term 4

Parent 3

-- term 6

-- term 7

 

In order to achieve the above, I created a View (Node). In this View, I added a relationship of Parent Term. Then, in the fields, I added Taxonomy: Term, select the Parent Term relationship, and excluded it from display. (This would be the Parent label). Then, I once again added the field Taxonomy: Term. (This would be the terms). This would display the Parent of each term as well, like Parent 1: term 1. Sweet.

 

So now for the groupping part:

 

In the Style option (under the basic settings), by little gear icon, I selected the Group By: Taxonomy: Term (The field that holds the relationship). You can select any format you would like, as long as you adjust the groupping options accordignly. 

 

*If the groupping is not working as expected, make sure to disable the Themer module, as it messes with the output.* 

 

The view is ready and works like a charm :) All that's left, is to attach it to the node. There are many ways to do this, including a number of modules, but I preffered to do it with some code.

 

I copied the node.tpl.php and renamed it to node-content-type-1.tpl.php, to override the output of the node for this particular content type. I deleted the section where terms are printed, and programmatically inserted the view, with the node id argument, using:

 

<?php

$viewName = 'views_name';

$display_id = 'default';

print views_embed_view($viewName, $display_id, $node->nid);

?>

 

And that's it :) The terms of the nodes are displayed under each node, and groupped by the term parent.