In hook_node_view() I want to rewrite some fields' values. The $node parameter is not referenced, so how can I rewrite a value?


Take a look at the API documentation for hook_node_view, specifically the comments at the end of the page -> Has anyone been able to successfully modify a node object?. There's talk of using hook_node_load as a solution as well as many of the hooks that are field specific. Note the comments at the bottom of the hook_node_load API page that explains why $nodes is not called by reference but is still changed when changes are made to the variable within the hook re: OOP -> http://php.net/manual/en/language.oop5.references.php.

  • In the hook I enter $node = array() but the node is loaded completely with all fields. Why? – hpn Sep 19 '11 at 18:35
  • I also implemented hook_field_load and hook_field_prepare_view but they don't seem to be called.(Tested with exit() command in hook function body!) – hpn Sep 19 '11 at 18:38

Clear the cache or visit the Modules page to get the hook picked up after you've added it to your module. Then something like this will work.

function my_module_node_view($node, $view_mode, $langcode) {  
  switch($node->type) {
    case 'foo':
      $node->content['field_my_field'][0]['#markup'] = 'Changed!';  
  • For some reason the changed value is not showing only the original. When I check with dpm the node I can see the value updated, but still the old value is shown to the user. Any tips? – giorgio79 Oct 5 '11 at 3:49

You can do that by implementing template_preprocess_field(&$variables, $hook) in your template.php

function THEMENAME_preprocess_field(&$variables, $hook) {
  if ($node = menu_get_object()) {
    if ($node->type == 'car') {
      if($variables['element']['#field_name'] == 'field_price') {
        $variables['items']['0']['#markup'] = $new_value; //new value;

Check here: http://tassaf.moriamedia.com/change-field-value-in-node-view/

  • Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. – mpdonadio Feb 2 '14 at 16:58

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