7

In D7, how do I programmatically add/modify fields to taxonomy terms? They are clearly fieldable and in UI I can add and edit fields in them just like I do in nodes but it proved to be no easy task in the code. Say I have a vocabulary named Fruit with terms like Apples and Bananas. I've added a field to it named main_article_id, so all terms have Name, Description and Main Article Id. When I create a node named Apples that has a reference to the Fruit vocabulary (field_fruit) and Apples term is selected, the code should update Apples term and set its main_article_id field to $node->nid. Here is my code:

//hook_node_insert fires after new node has been inserted into db
function MYMODULE_node_insert($node)
{
    $taxonomy_term_id = $node->field_FRUIT[LANGUAGE_NONE][0]['value'];
    $taxonomy_term = taxonomy_term_load($value['tid']);
    if($taxonomy_term != FALSE)
    {
        //doesn't work
        $taxonomy_term->field_main_article_id[LANGUAGE_NONE][0]['value'] = $node->nid;
        taxonomy_term_save($taxonomy_term);
    }
}
9

The column name for a field isn't always value; in the case of taxonomy term references it's tid, and in the case of node/entity references it depends on what module you're using.

For a field created using the References module the name is nid, and for one created using the Entity Reference module, it's target_id.

The following code should work a bit better:

//hook_node_insert fires after new node has been inserted into db
function MYMODULE_node_insert($node)
{
    $taxonomy_term_id = $node->field_FRUIT[LANGUAGE_NONE][0]['tid'];

    // $value['tid'] isn't defined anywhere in this function scope so I 
    // assume you meant to use $taxonomy_term_id here
    $taxonomy_term = taxonomy_term_load($taxonomy_term_id);
    if($taxonomy_term != FALSE)
    {
        $column_name = 'nid'; // Or 'target_id' if you're using entity reference            

        $taxonomy_term->field_main_article_id[LANGUAGE_NONE][0][$column_name] = $node->nid;
        taxonomy_term_save($taxonomy_term);
    }
}
  • You're right about $value['tid'], sorry for mistake in the code. But I don't use any modules to create my field. I just added it manually on the vocabulary Edit Fields page. I tried to look at taxonomy_term when editing it in the UI. Inside hook_taxonomy_term_presave($term) $term it looked like this in print_r(): stdClass Object ( [tid] => 20 [vid] => 6 [name] => Fruit ... [field_main_article_id] => Array ([und] => Array([0] => Array([value] => 14))) – Ari Linn May 16 '12 at 15:41
  • Gotcha, that one should definitely be 'value' then. The taxonomy term reference, though, will also definitely be 'tid', so maybe you just need to change that line ($taxonomy_term_id = $node->field_FRUIT[LANGUAGE_NONE][0]['tid'];) and not the other one – Clive May 16 '12 at 15:44
  • already done that. :-) Still it doesn't work. By the way I looked at the result taxonomy_term_load($taxonomy_term_id) produces, and it looked like this: stdClass Object([tid] => 1 [vid] => 2 [name] => Apples [description] => [format] => full_html [weight] => 0 [vocabulary_machine_name] => fruit [rdf_mapping] => ...). My preciousss field_main_article_id is nowhere to be found (I can see it in UI perfectly though). Should taxonomy_term_load operate this way? – Ari Linn May 16 '12 at 16:01
  • Sorry again, my bad. I was being stupid and looked to the wrong place, that's why I didn't see any changes in my taxonomy terms. Your code works. Thanks. – Ari Linn May 16 '12 at 16:27
  • Should taxonomy_term_save also work for updating a term's parents? I'm trying to use it for this purpose, but I'm running into an issue with updating the data. – Brent Connor Jul 17 '17 at 16:38

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