Same name in other branches

1. 9 core/modules/views/src/ViewExecutable.php \Drupal\views\ViewExecutable::render()
2. 8.9.x core/modules/views/src/ViewExecutable.php \Drupal\views\ViewExecutable::render()
3. 10 core/modules/views/src/ViewExecutable.php \Drupal\views\ViewExecutable::render()

Renders this view for a certain display.

Note: You should better use just the preview function if you want to render a view.

Parameters

string $display_id: The machine name of the display, which should be rendered.

Return value

array|null A renderable array containing the view output or NULL if the build process failed.

File

core/modules/views/src/ViewExecutable.php, line 1512

Class

ViewExecutable

Represents a view as a whole.

Namespace

Drupal\views

Code

public function render($display_id = NULL) {
    $this->execute($display_id);
    // Check to see if the build failed.
    if (!empty($this->build_info['fail'])) {
        return;
    }
    if (!empty($this->build_info['denied'])) {
        return;
    }
    
    /** @var \Drupal\views\Plugin\views\exposed_form\ExposedFormPluginInterface $exposed_form */
    $exposed_form = $this->display_handler
        ->getPlugin('exposed_form');
    $exposed_form->preRender($this->result);
    $module_handler = \Drupal::moduleHandler();
    // @todo In the long run, it would be great to execute a view without
    //   the theme system at all. See https://www.drupal.org/node/2322623.
    $active_theme = \Drupal::theme()->getActiveTheme();
    $themes = array_reverse(array_keys($active_theme->getBaseThemeExtensions()));
    $themes[] = $active_theme->getName();
    // Check for already-cached output.
    
    /** @var \Drupal\views\Plugin\views\cache\CachePluginBase $cache */
    if (!empty($this->live_preview)) {
        $cache = Views::pluginManager('cache')->createInstance('none');
    }
    else {
        $cache = $this->display_handler
            ->getPlugin('cache');
    }
    // Run preRender for the pager as it might change the result.
    if (!empty($this->pager)) {
        $this->pager
            ->preRender($this->result);
    }
    // Initialize the style plugin.
    $this->initStyle();
    if (!isset($this->response)) {
        // Set the response so other parts can alter it.
        $this->response = new Response('', 200);
    }
    // Give field handlers the opportunity to perform additional queries
    // using the entire resultset prior to rendering.
    if ($this->style_plugin
        ->usesFields()) {
        foreach ($this->field as $id => $handler) {
            if (!empty($this->field[$id])) {
                $this->field[$id]
                    ->preRender($this->result);
            }
        }
    }
    $this->style_plugin
        ->preRender($this->result);
    // Let each area handler have access to the result set.
    $areas = [
        'header',
        'footer',
    ];
    // Only call preRender() on the empty handlers if the result is empty.
    if (empty($this->result)) {
        $areas[] = 'empty';
    }
    foreach ($areas as $area) {
        foreach ($this->{$area} as $handler) {
            $handler->preRender($this->result);
        }
    }
    // Let modules modify the view just prior to rendering it.
    $module_handler->invokeAll('views_pre_render', [
        $this,
    ]);
    // Let the themes play too, because prerender is a very themey thing.
    foreach ($themes as $theme_name) {
        $function = $theme_name . '_views_pre_render';
        if (function_exists($function)) {
            $function($this);
        }
    }
    $this->display_handler->output = $this->display_handler
        ->render();
    $exposed_form->postRender($this->display_handler->output);
    $cache->postRender($this->display_handler->output);
    // Let modules modify the view output after it is rendered.
    $module_handler->invokeAll('views_post_render', [
        $this,
        &$this->display_handler->output,
        $cache,
    ]);
    // Let the themes play too, because post render is a very themey thing.
    foreach ($themes as $theme_name) {
        $function = $theme_name . '_views_post_render';
        if (function_exists($function)) {
            $function($this, $this->display_handler->output, $cache);
        }
    }
    return $this->display_handler->output;
}

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