Issue #3280618 by piotrsmykaj: Trying to access array offset on value of type...

Issue #3280618 by piotrsmykaj: Trying to access array offset on value of type null w FieldInfo->prepareInstanceDisplay()

views/views_handler_weight_selector.inc

+<?php
+
+class views_handler_weight_selector extends views_handler_field {
+
+  function init(&$view, &$options) {
+    parent::init($view, $options);
+
+    $this->options['weight_selector'] = TRUE;
+  }
+
+  function option_definition() {
+    $options = parent::option_definition();
+
+    $options['weight_range'] = array(
+      'default' => 20,
+    );
+
+    return $options;
+  }
+
+  function options_form(&$form, &$form_state) {
+    parent::options_form($form, $form_state);
+
+    $form['weight_range'] = array(
+      '#type' => 'textfield',
+      '#title' => t('Range'),
+      '#description' => t('The range of weights available to select. For
+        example, a range of 20 will allow you to select a weight between -20
+        and 20.'),
+      '#default_value' => $this->options['weight_range'],
+      '#size' => 5,
+    );
+  }
+
+  function render($values) {
+    return '<!--form-item-' . $this->options['id'] . '--' . $this->view->row_index . '-->';
+  }
+
+  function access() {
+    return user_access('assign node weight');
+  }
+
+  function views_form(&$form, &$form_state) {
+    // The view is empty, abort.
+    if (empty($this->view->result)) {
+      $form['#access'] = FALSE;
+      return;
+    }
+
+    $form[$this->options['id']] = array(
+      '#tree' => TRUE,
+    );
+
+    $options = _weight_get_options($this->options['weight_range']);
+    $entities = entity_get_info();
+
+    foreach ($entities as $type => $entity_info) {
+      if (isset($entity_info['base table']) && $this->view->base_table == $entity_info['base table']) {
+        $entity_type = $type;
+        $entity_key = $entity_info['entity keys']['id'];
+
+        // 2096231: patch for draggable views.
+        $field = $this->view->field[$entity_key];
+        if (!empty($field->field_alias)) {
+          $entity_key = $field->field_alias;
+        }
+      }
+    }
+
+    // At this point, the query has already been run, so we can access the results
+    foreach ($this->view->result as $row_index => $row) {
+      $entity = entity_load($entity_type, array($row->{$entity_key}));
+
+      $form[$this->options['id']][$row_index]['weight'] = array(
+        '#type' => 'select',
+        '#title' => t('Weight for row @number', array('@number' => $row_index + 1)),
+        '#title_display' => 'invisible',
+        '#options' =>  $options,
+        '#default_value' => $this->get_value($row),
+        '#attributes' => array('class' => array('weight-selector')),
+      );
+
+      $form[$this->options['id']][$row_index]['entity'] = array(
+        '#type' => 'value',
+        '#value' => $entity,
+      );
+    }
+
+    $form['entity_type'] = array(
+      '#type' => 'value',
+      '#value' => $entity_type,
+    );
+
+    $form['views_field'] = array(
+      '#type' => 'value',
+      '#value' => $this->field,
+    );
+
+    $form['#action'] = request_uri();
+  }
+
+  function views_form_submit($form, &$form_state) {
+    $values = $form_state['values'];
+    $field_name = str_replace('_selector', '' , $values['views_field']);
+
+    foreach ($values[$values['views_field']] as $value) {
+      $entity = array_pop($value['entity']);
+      $lang = field_language($values['entity_type'], $entity, $field_name);
+      $entity->{$field_name}[$lang][0]['value'] = $value['weight'];
+      entity_save($values['entity_type'], $entity);
+    }
+  }
+}