How to update a field value for a node?

Question

I want to change the value of a field for a node.I used the following code:

$node = node_load($nid); // $nid is the function's parameter
$node->field['field_myfield'][$node->language][0]['value'] = 1;
node_save($node);

The problem is $node->language returns es while in print_r($node) it's und. Why $node->language is different from what's in $node array and how can I get it?

Answer 1

$node = node_load($nid);
$node_wrapper = entity_metadata_wrapper('node', $node);
$node_wrapper->field_myfield->set(1);
$node_wrapper->save();

Entity metadata wrapper is a great way for set or read values of fields in the node!

Answer 2

Try field_attach_update() function.

$node = node_load($nid); // $nid is the function's parameter
$node->field['field_myfield'][LANGUAGE_NONE][0]['value'] = 1;
field_attach_update('node', $node);

It will update the field's value and it performs better than node_save.

Answer 3

$node = node_load($nid); 
$field_language = field_language('node', $node, 'field_myfield');
$node->field['field_myfield'][$field_language][0]['value'] = 1;
node_save($node);

Answer 4

If you want to update only field value (without updating node metadata about updated time, revisions) use function field_attach_update().

Example:

$node = node_load($nid);
$field_language = field_language('node', $node, 'field_myfield');
$node->field_fieldname[$field_language][0]['value'] = 'some value';
field_attach_update('node', $node);

Sometimes additionally you might need to reset node static cache with resetCache(array($nid)):

entity_get_controller('node')->resetCache(array($node->nid));

Source: Saving node's fields without saving the node itself

Answer 5

I have just implemented this and found that this code worked for me.

$node = node_load($nid); 
if (isset($node)) {
  $field_language = field_language('node', $node, 'field_myfield');
  $node->field_fieldname[$field_language][0]['value'] = 'some value';
  node_save($node);
}

Note that I when updating field_fieldname I found that using this in line 4

$node->field['field_myfield'][0]['value'] = 'some value';

did not work.