/**
* Execute the view's query.
*
* @param string $display_id
* The machine name of the display, which should be executed.
*
* @return bool
* Return whether the executing was successful, for example an argument
* could stop the process.
*/
public function execute($display_id = NULL)
{
if (empty($this->built)) {
if (!$this->build($display_id)) {
return FALSE;
}
}
if (!empty($this->executed)) {
return TRUE;
}
// Don't allow to use deactivated displays, but display them on the live preview.
if (!$this->display_handler->isEnabled() && empty($this->live_preview)) {
$this->build_info['fail'] = TRUE;
return FALSE;
}
// Let modules modify the view just prior to executing it.
$module_handler = \Drupal::moduleHandler();
$module_handler->invokeAll('views_pre_execute', array($this));
// Check for already-cached results.
if (!empty($this->live_preview)) {
$cache = $this->display_handler->getPlugin('cache', 'none');
} else {
$cache = $this->display_handler->getPlugin('cache');
}
if ($cache->cacheGet('results')) {
if ($this->pager->usePager()) {
$this->pager->total_items = $this->total_rows;
$this->pager->updatePageInfo();
}
} else {
$this->query->execute($this);
// Enforce the array key rule as documented in
// views_plugin_query::execute().
$this->result = array_values($this->result);
$this->_postExecute();
$cache->cacheSet('results');
}
// Let modules modify the view just after executing it.
$module_handler->invokeAll('views_post_execute', array($this));
$this->executed = TRUE;
}
/**
* Tests the usePager() method.
*
* @see \Drupal\views\Plugin\views\pager\PagerPluginBase::usePager()
*/
public function testUsePager()
{
$this->assertTrue($this->pager->usePager());
}
