Computed field from field collection values

Hi BP, your code helped my a lot. This is my code to copy field collection data in a computed field array. I hope I can help you back with it. I am now struckling with the $output. I prints the actual html entity instead of performing a line break.

function computed_field_field_risico_verzameld_compute(&$entity_field, $entity_type, $entity, $field, $instance, $langcode, $items) {
  $field_collection_items = field_get_items($entity_type, $entity, 'field_risico'); // field_risico is node field
  $field_collection_item_ids = array();
  foreach ($field_collection_items as $field_collection_item) {
    $field_collection_item_ids[] = $field_collection_item['value'];
  }
  $field_collection_item_fields = entity_load('field_collection_item', $field_collection_item_ids);
  $links = array();
  foreach ($field_collection_item_fields as $field_collection_item_field) {
    $tid = field_get_items('field_collection_item', $field_collection_item_field, 'field_risicoterm');  // field_risicoterm is fieldcollection field
    $term = taxonomy_term_load($tid[0]['tid']);
    $link = field_get_items('field_collection_item', $field_collection_item_field, 'field_link');  // field_link is fieldcollection field
    $links[$term->name] = $link[0]['value'];
  }
  $output = '';
  foreach ($links as $term => $link) {
    $output .= $term .' - '. $link .'<br />';
  }
  $entity_field[0]['value'] = $output;
}

Computed field gives you two choices: you can put your php code in the field directly or you can make your own function in a custom module, which I did. It is explained in the field description. So in my function name, risico_verzameld is the name of the computed field.

I posted the complete compute function in comment#2. Create your own empty custom module (create an .info and .module file, put the function in the .module file, enable the module and go.

@BParticle: Have you tried the getIterator() method?

Try changing foreach ($meta_wrapper->field_student as $line)

To: foreach ($meta_wrapper->field_student->getIterator() as $line)

I have 3 fields in a field collection 2 terms refrence fields whose tids are 625 with term name -xyz ,tid - 626 with term name 'pqr' and field_time_duration filed.I want to filter the values by one of the tid or term name and populate one computed i.e field field_xyz =sum of durations filtered by tid 625 xyz and another computed field filed_pqr =sum of duartions filtered by tid 625-pqr
how to do that?
or since I just have two terms, may be instead of terms I can also use list integer field and filter using that field
can someone help plz?

I have creating two different content type "A" and "B" , i have created a field name "a_field_s" and "b_field_s" where **field type** is "computed" accordingly where first is for content type "A" and other is for B.

I am adding few fields in "a_field_s" with writing code as:

$entity_field[0]['value'] = $entity->field_class_3rd_no_of_student_ic[LANGUAGE_NONE][0]['value'] + $entity->field_class_4th_no_of_student_ic[LANGUAGE_NONE][0]['value'];

And also few fields in "b_field_s" as:

$entity_field[0]['value'] = $entity->field_class_3rd_no_of_student_ib[LANGUAGE_NONE][0]['value'] + $entity->field_class_4th_no_of_student_ib[LANGUAGE_NONE][0]['value'];

Both computed fields are working well.

Now i have taken one more field in other content type "C" naming "c_fields_s" as computed, and i want addition of "a_field_s" and "b_field_s" in this new field.

@ swapnil66, If the Content type c is the last one you are creating then use rules and sum and set value before saving. create an integer field in C content type for this NOT computed field.

I had a problem similar to first part of original description when I checked "Recalculate the field value every time." option.

the problem behind this is that the entity object is not exactly the same when the computed field does the calculation after node edit/creation of when node viewing. When creating or editing a node the $entity->field_collection_field contains real values but when viewing the node it contains field collection id. The methods to get real values are, then, different.

You can install devel module and expose then $entity object with dpm($entity) within your computed field code to see this. You will notice that the entity object gets printed twice when you select "Recalculate the field value every time. " and you edit a node with the computed field: once because its being edited and another one cause its being viewed.

For instance, this is my code in my computed field. It sums all field_cost field values of my field_ingredients_formula field collection.

    $total = 0;
    foreach ($entity->field_ingredients_formula['und'] as $key => $value) {
      if (isset($value['value'])) {
        $id = $value['value'];
        $ingredient = entity_metadata_wrapper('field_collection_item', $id);
        $cost = $ingredient->field_cost->value();
        $total += $cost;
      }
      elseif (isset($value['field_cost']['und'][0]['value'])) {
        $cost = $value['field_cost']['und'][0]['value'];
        $total += $cost;
      }
    }
    $entity_field[0]['value'] = $total;

I have modified this to work with paragraphs, wich have replaced field collection in 8, but I keep erroring out. It is supposed to sum all field_total field values of field_job_parts paragraph. I have a node called Job with paragraph field field_job_parts containing a field called field_total that I need to sum up. Below is my code.

    $total = 0;
    foreach ($entity->field_job_parts['und'] as $key => $value) {
      if (isset($value['value'])) {
        $id = $value['value'];
        $part = entity_metadata_wrapper('paragraphs_item', $id);
        $cost = $part->field_total->value();
        $total += $cost;
      }
      elseif (isset($value['field_total']['und'][0]['value'])) {
        $cost = $value['field_total']['und'][0]['value'];
        $total += $cost;
      }
    }
    $entity_field[0]['value'] = $total;

What am I missing here?