Drupal HOOK_views_pre_render对于$ views-> result的简单更改不起作用

Question

well I haven't been able to find the problem with my little custom module for a couple of days, I'm hoping some clever and kind person might spot my issue ;)

So I am creating a simple module that runs on a certain view type, this view contains images, the images have alt tags, I want to amend these alt tags by using the url alias and sticking this on the end of the alt tag..

I have successfully found the data in the $view array and I have looped through all image instances and done as said above, I know it has worked because I have printed them out onto the page.

However it is not updating the view on the actual page, the alt tags remain the same... Please excuse my ignorance here as I am learning PHP and multidimensional keyed arrays are taking some time to sink in.

So what is the variable called for the alt tag, an object? I think that's wrong but anyway.. This variable which is ..

$view->result[0]->_field_data['nid']['entity']->field_image_front_menu['und'][0]['alt']

... is being changed, everything seems fine inside the function and I have tried

return $view

but to no avail.

Here is my code in entirety

<?php
  function image_alt_tag_alter_views_pre_render(&$view) {

    if ($view->name == "we_print_for_menu") {
    $path = arg(0) . "/" . arg(1);
    $alias = drupal_get_path_alias($path);


      // loops through index in array to change each alt tag

      for ($i = 0; $i < count($view->result); ++$i) {
            $view->result[$i]->_field_data['nid']['entity']->field_image_front_menu['und'][0]['alt'] = $view->result[$i]->_field_data['nid']['entity']->field_image_front_menu['und'][0]['alt'] . $alias;
          }

      return $view;
?>

Answer 1

<?php

function image_alt_tag_alter_views_post_execute(&$view) {
  global $user;
  if ($view->name == "we_print_for_menu") {
    path = arg(0) . "/" . arg(1);
    $alias = drupal_get_path_alias($path);

    dsm($view);

    for ($i = 0; $i < count($view->result); ++$i) {
       $amended_alt = $view->result[$i]->_field_data['nid']['entity']->field_image_front_menu['und'][0]['alt'] . " " . $alias;
       $view->result[$i]->_field_data['nid']['entity']->field_image_front_menu['und'][0]['alt'] = $amended_alt;
    }
  }

}