Same name in other branches

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

Builds the query for the view.

Parameters

string $display_id: The display ID of the view.

Return value

bool|null TRUE if the view build process was successful, FALSE if setting the display fails or NULL if the view has been built already.

1 call to ViewExecutable::build()

ViewExecutable::execute in core/modules/views/src/ViewExecutable.php

Executes the view's query.

File

core/modules/views/src/ViewExecutable.php, line 1255

Class

ViewExecutable

Represents a view as a whole.

Namespace

Drupal\views

Code

public function build($display_id = NULL) {
    if (!empty($this->built)) {
        return;
    }
    if (empty($this->current_display) || $display_id) {
        if (!$this->setDisplay($display_id)) {
            return FALSE;
        }
    }
    // Let modules modify the view just prior to building it.
    $module_handler = \Drupal::moduleHandler();
    $module_handler->invokeAll('views_pre_build', [
        $this,
    ]);
    // Attempt to load from cache.
    // @todo Load a build_info from cache.
    $start = microtime(TRUE);
    // If that fails, let's build!
    $this->build_info = [
        'query' => '',
        'count_query' => '',
        'query_args' => [],
    ];
    $this->initQuery();
    // Call a module hook and see if it wants to present us with a
    // pre-built query or instruct us not to build the query for
    // some reason.
    // @todo Implement this. Use the same mechanism Panels uses.
    // Run through our handlers and ensure they have necessary information.
    $this->initHandlers();
    // Let the handlers interact with each other if they really want.
    $this->_preQuery();
    if ($this->display_handler
        ->usesExposed()) {
        
        /** @var \Drupal\views\Plugin\views\exposed_form\ExposedFormPluginInterface $exposed_form */
        $exposed_form = $this->display_handler
            ->getPlugin('exposed_form');
        $this->exposed_widgets = $exposed_form->renderExposedForm();
        if (!empty($this->build_info['abort'])) {
            $this->built = TRUE;
            // Don't execute the query, $form_state, but rendering will still be executed to display the empty text.
            $this->executed = TRUE;
            return empty($this->build_info['fail']);
        }
    }
    // Build all the relationships first thing.
    $this->_build('relationship');
    // Set the filtering groups.
    if (!empty($this->filter)) {
        $filter_groups = $this->display_handler
            ->getOption('filter_groups');
        if ($filter_groups) {
            $this->query
                ->setGroupOperator($filter_groups['operator']);
            foreach ($filter_groups['groups'] as $id => $operator) {
                $this->query
                    ->setWhereGroup($operator, $id);
            }
        }
    }
    // Build all the filters.
    $this->_build('filter');
    $this->build_sort = TRUE;
    // Arguments can, in fact, cause this whole thing to abort.
    if (!$this->_buildArguments()) {
        $this->build_time = microtime(TRUE) - $start;
        $this->attachDisplays();
        return $this->built;
    }
    // Initialize the style; arguments may have changed which style we use,
    // so waiting as long as possible is important. But we need to know
    // about the style when we go to build fields.
    if (!$this->initStyle()) {
        $this->build_info['fail'] = TRUE;
        return FALSE;
    }
    if ($this->style_plugin
        ->usesFields()) {
        $this->_build('field');
    }
    // Build our sort criteria if we were instructed to do so.
    if (!empty($this->build_sort)) {
        // Allow the style handler to deal with sorting.
        if ($this->style_plugin
            ->buildSort()) {
            $this->_build('sort');
        }
        // Allow the plugin to build second sorts as well.
        $this->style_plugin
            ->buildSortPost();
    }
    // Allow area handlers to affect the query.
    $this->_build('header');
    $this->_build('footer');
    $this->_build('empty');
    // Allow display handler to affect the query:
    $this->display_handler
        ->query($this->display_handler
        ->useGroupBy());
    // Allow style handler to affect the query:
    $this->style_plugin
        ->query($this->display_handler
        ->useGroupBy());
    // Allow exposed form to affect the query:
    if (isset($exposed_form)) {
        $exposed_form->query();
    }
    if (\Drupal::config('views.settings')->get('sql_signature')) {
        $this->query
            ->addSignature($this);
    }
    // Let modules modify the query just prior to finalizing it.
    $this->query
        ->alter($this);
    // Only build the query if we weren't interrupted.
    if (empty($this->built)) {
        // Build the necessary info to execute the query.
        $this->query
            ->build($this);
    }
    $this->built = TRUE;
    $this->build_time = microtime(TRUE) - $start;
    // Attach displays
    $this->attachDisplays();
    // Let modules modify the view just after building it.
    $module_handler->invokeAll('views_post_build', [
        $this,
    ]);
    return TRUE;
}

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