I recently ran into this rather cryptic error message:

Notice: Undefined property: stdClass::$_entity in Drupal\system\Plugin\views\row\EntityRow->pre_render() (line 123 of core/modules/system/lib/Drupal/system/Plugin/views/row/EntityRow.php).

In Drupal\system\Plugin\views\row\EntityRow:


  public function pre_render($result) {
    parent::pre_render($result);

    if ($result) {
      // Get all entities which will be used to render in rows.
      $entities = array();
      foreach ($result as $row) {
        $entity = $row->_entity;
        $entity->view = $this->view;
        $entities[$entity->id()] = $entity;
      }

      // Prepare the render arrays for all rows.
      $this->build = entity_view_multiple($entities, $this->options['view_mode']);
    }
  }

The initial value of $row->_entity is FALSE I believe, and if that's not populated with an entity by the time this code runs, the initial value of $entity is FALSE. What's crazy, is even if $entity is FALSE, $entity->view = $this->view will turn $entity into a stdClass.

Perhaps this is a symptom of a larger issue, but I'd think views could use more validation around this since this error message is always going to be confusing.

Comments

tim.plunkett’s picture

Issue tags: +VDC

Tagging

Version: 8.0.x-dev » 8.1.x-dev

Drupal 8.0.6 was released on April 6 and is the final bugfix release for the Drupal 8.0.x series. Drupal 8.0.x will not receive any further development aside from security fixes. Drupal 8.1.0-rc1 is now available and sites should prepare to update to 8.1.0.

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Version: 8.1.x-dev » 8.2.x-dev

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Bug reports should be targeted against the 8.3.x-dev branch from now on, and new development or disruptive changes should be targeted against the 8.4.x-dev branch. For more information see the Drupal 8 minor version schedule and the Allowed changes during the Drupal 8 release cycle.

Version: 8.3.x-dev » 8.4.x-dev

Drupal 8.3.6 was released on August 2, 2017 and is the final full bugfix release for the Drupal 8.3.x series. Drupal 8.3.x will not receive any further development aside from critical and security fixes. Sites should prepare to update to 8.4.0 on October 4, 2017. (Drupal 8.4.0-alpha1 is available for testing.)

Bug reports should be targeted against the 8.4.x-dev branch from now on, and new development or disruptive changes should be targeted against the 8.5.x-dev branch. For more information see the Drupal 8 minor version schedule and the Allowed changes during the Drupal 8 release cycle.

Version: 8.4.x-dev » 8.5.x-dev

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Version: 8.5.x-dev » 8.6.x-dev

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Version: 8.6.x-dev » 8.8.x-dev

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Version: 8.8.x-dev » 8.9.x-dev

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Bug reports should be targeted against the 8.9.x-dev branch from now on, and new development or disruptive changes should be targeted against the 9.1.x-dev branch. For more information see the Drupal 8 and 9 minor version schedule and the Allowed changes during the Drupal 8 and 9 release cycles.

Lendude’s picture

Issue summary: View changes
Status: Active » Closed (duplicate)
Issue tags: +Needs steps to reproduce, +Bug Smash Initiative
Related issues: +#2457999: Cannot use relationship for rendered entity on Views

Cleaning up old bugs.

Wow, some of this code still exists. The most common way to run into $row->_entity not being set is #2457999: Cannot use relationship for rendered entity on Views and since this doesn't have specific steps to reproduce it in this case, I'm going to close this as a duplicate of that.

If this had another origin, then please feel free to reopen this.