abstract class RelationshipPluginBase

Simple relationship handler that allows a new version of the primary table to be linked in.

The base relationship handler can only handle a single join. Some relationships are more complex and might require chains of joins; for those, you must utilize a custom relationship handler.

Definition items:

  • base: The new base table this relationship will be adding. This does not have to be a declared base table, but if there are no tables that utilize this base table, it won't be very effective.
  • base field: The field to use in the relationship; if left out this will be assumed to be the primary field.
  • relationship table: The actual table this relationship operates against. This is analogous to using a 'table' override.
  • relationship field: The actual field this relationship operates against. This is analogous to using a 'real field' override.
  • label: The default label to provide for this relationship, which is shown in parentheses next to any field/sort/filter/argument that uses the relationship.

Hierarchy

Expanded class hierarchy of RelationshipPluginBase

Related topics

Views relationship handlers
Handlers to tell Views how to create alternate relationships.
Views relationship handlers
Handlers to tell Views how to create alternate relationships.
2 files declare their use of RelationshipPluginBase
EntityReverse.php in drupal/core/modules/field/lib/Drupal/field/Plugin/views/relationship/EntityReverse.php
Definition of Drupal\field\Plugin\views\relationship\EntityReverse.
NodeTermData.php in drupal/core/modules/taxonomy/lib/Drupal/taxonomy/Plugin/views/relationship/NodeTermData.php
Definition of Drupal\taxonomy\Plugin\views\relationship\NodeTermData.

File

drupal/core/modules/views/lib/Drupal/views/Plugin/views/relationship/RelationshipPluginBase.php, line 45
Definition of Drupal\views\Plugin\views\relationship\RelationshipPluginBase.

Namespace

Drupal\views\Plugin\views\relationship
View source
abstract class RelationshipPluginBase extends HandlerBase {

  /**
   * Init handler to let relationships live on tables other than
   * the table they operate on.
   */
  public function init(ViewExecutable $view, &$options) {
    $this
      ->setOptionDefaults($this->options, $this
      ->defineOptions());
    parent::init($view, $options);
    if (isset($this->definition['relationship table'])) {
      $this->table = $this->definition['relationship table'];
    }
    if (isset($this->definition['relationship field'])) {

      // Set both realField and field so custom handler can rely on the old
      // field value.
      $this->realField = $this->field = $this->definition['relationship field'];
    }
  }

  /**
   * Get this field's label.
   */
  function label() {
    if (!isset($this->options['label'])) {
      return $this
        ->adminLabel();
    }
    return $this->options['label'];
  }
  protected function defineOptions() {
    $options = parent::defineOptions();

    // Relationships definitions should define a default label, but if they aren't get another default value.
    if (!empty($this->definition['label'])) {
      $label = $this->definition['label'];
    }
    else {
      $label = !empty($this->definition['field']) ? $this->definition['field'] : $this->definition['base field'];
    }
    $options['label'] = array(
      'default' => $label,
      'translatable' => TRUE,
    );
    $options['required'] = array(
      'default' => FALSE,
      'bool' => TRUE,
    );
    return $options;
  }

  /**
   * Default options form that provides the label widget that all fields
   * should have.
   */
  public function buildOptionsForm(&$form, &$form_state) {
    parent::buildOptionsForm($form, $form_state);
    $form['label'] = array(
      '#type' => 'textfield',
      '#title' => t('Identifier'),
      '#default_value' => isset($this->options['label']) ? $this->options['label'] : '',
      '#description' => t('Edit the administrative label displayed when referencing this relationship from filters, etc.'),
      '#required' => TRUE,
    );
    $form['required'] = array(
      '#type' => 'checkbox',
      '#title' => t('Require this relationship'),
      '#description' => t('Enable to hide items that do not contain this relationship'),
      '#default_value' => !empty($this->options['required']),
    );
  }

  /**
   * Called to implement a relationship in a query.
   */
  public function query() {

    // Figure out what base table this relationship brings to the party.
    $table_data = views_fetch_data($this->definition['base']);
    $base_field = empty($this->definition['base field']) ? $table_data['table']['base']['field'] : $this->definition['base field'];
    $this
      ->ensureMyTable();
    $def = $this->definition;
    $def['table'] = $this->definition['base'];
    $def['field'] = $base_field;
    $def['left_table'] = $this->tableAlias;
    $def['left_field'] = $this->realField;
    $def['adjusted'] = TRUE;
    if (!empty($this->options['required'])) {
      $def['type'] = 'INNER';
    }
    if (!empty($this->definition['extra'])) {
      $def['extra'] = $this->definition['extra'];
    }
    if (!empty($def['join_id'])) {
      $id = $def['join_id'];
    }
    else {
      $id = 'standard';
    }
    $join = drupal_container()
      ->get('plugin.manager.views.join')
      ->createInstance($id, $def);

    // use a short alias for this:
    $alias = $def['table'] . '_' . $this->table;
    $this->alias = $this->query
      ->add_relationship($alias, $join, $this->definition['base'], $this->relationship);

    // Add access tags if the base table provide it.
    if (empty($this->query->options['disable_sql_rewrite']) && isset($table_data['table']['base']['access query tag'])) {
      $access_tag = $table_data['table']['base']['access query tag'];
      $this->query
        ->add_tag($access_tag);
    }
  }

  /**
   * You can't groupby a relationship.
   */
  public function usesGroupBy() {
    return FALSE;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
HandlerBase::$actualField public property When a field has been moved this property is set.
HandlerBase::$actualTable public property When a table has been moved this property is set.
HandlerBase::$field public property With field you can override the realField if the real field is not set.
HandlerBase::$query public property Where the $query object will reside: 1
HandlerBase::$realField public property The actual field in the database table, maybe different on other kind of query plugins/special handlers.
HandlerBase::$relationship public property The relationship used for this field.
HandlerBase::$table public property The table this handler is attached to.
HandlerBase::$tableAlias public property The alias of the table of this handler which is used in the query.
HandlerBase::acceptExposedInput public function Take input from exposed handlers and assign to this handler, if necessary. 1
HandlerBase::access public function Check whether current user has access to this handler. 6
HandlerBase::adminLabel public function Return a string representing this handler's name in the UI. 9
HandlerBase::adminSummary public function Provide text for the administrative summary 4
HandlerBase::breakPhrase public static function Breaks x,y,z and x+y+z into an array. Numeric only.
HandlerBase::breakPhraseString public static function Breaks x,y,z and x+y+z into an array. Works for strings.
HandlerBase::broken public function Determine if the handler is considered 'broken', meaning it's a a placeholder used when a handler can't be found. 6
HandlerBase::buildExposedForm public function Render our chunk of the exposed handler form when selecting 1
HandlerBase::buildExposeForm public function Form for exposed handler options. 2
HandlerBase::buildExtraOptionsForm public function Provide a form for setting options. 1
HandlerBase::buildGroupByForm public function Provide a form for aggregation settings. 1
HandlerBase::canExpose public function Determine if a handler can be exposed. 2
HandlerBase::caseTransform protected function Transform a string by a certain method.
HandlerBase::defaultExposeOptions public function Set new exposed option defaults when exposed setting is flipped on. 2
HandlerBase::defineExtraOptions public function Provide defaults for the handler.
HandlerBase::ensureMyTable public function Ensure the main table for this handler is in the query. This is used a lot. 8
HandlerBase::exposedInfo public function Get information about the exposed form for the form renderer. 1
HandlerBase::getEntityType public function Determines the entity type used by this handler.
HandlerBase::getField public function Shortcut to get a handler's raw field value.
HandlerBase::getJoin public function Get the join object that should be used for this handler.
HandlerBase::getSQLDateField public function Creates cross-database SQL dates.
HandlerBase::getSQLFormat public function Creates cross-database SQL date formatting.
HandlerBase::getTableJoin public static function Fetches a handler to join one table to a primary table from the data cache.
HandlerBase::getTimezone public static function Figure out what timezone we're in; needed for some date manipulations.
HandlerBase::hasExtraOptions public function If a handler has 'extra options' it will get a little settings widget and another form called extra_options. 1
HandlerBase::isAGroup public function Returns TRUE if the exposed filter works like a grouped filter. 1
HandlerBase::isExposed public function Determine if this item is 'exposed', meaning it provides form elements to let users modify the view.
HandlerBase::multipleExposedInput public function Define if the exposed input has to be submitted multiple times. This is TRUE when exposed filters grouped are using checkboxes as widgets. 1
HandlerBase::placeholder protected function Provides a unique placeholders for handlers.
HandlerBase::postExecute public function Run after the view is executed, before the result is cached.
HandlerBase::preQuery public function Run before the view is built. 1
HandlerBase::sanitizeValue protected function Sanitize the value for output.
HandlerBase::setRelationship public function Called just prior to query(), this lets a handler set up any relationship it needs.
HandlerBase::showExposeButton public function Shortcut to display the expose/hide button. 2
HandlerBase::showExposeForm public function Shortcut to display the exposed options form.
HandlerBase::storeExposedInput public function If set to remember exposed input in the session, store it there. 1
HandlerBase::submitExposed public function Submit the exposed handler form
HandlerBase::submitExposeForm public function Perform any necessary changes to the form exposes prior to storage. There is no need for this function to actually store the data.
HandlerBase::submitExtraOptionsForm public function Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.
HandlerBase::submitGroupByForm public function Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data. 1
HandlerBase::submitOptionsForm public function Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data. Overrides PluginBase::submitOptionsForm 7
HandlerBase::validate public function Validates the handler against the complete View. Overrides PluginBase::validate 1
HandlerBase::validateExposed public function Validate the exposed handler form 4
HandlerBase::validateExposeForm public function Validate the options form. 1
HandlerBase::validateExtraOptionsForm public function Validate the options form.
HandlerBase::validateOptionsForm public function Validate the options form. Overrides PluginBase::validateOptionsForm 4
HandlerBase::__construct public function Constructs a Handler object. Overrides PluginBase::__construct
PluginBase::$configuration protected property Configuration information passed into the plugin. 1
PluginBase::$definition public property Plugins's definition
PluginBase::$discovery protected property The discovery object.
PluginBase::$displayHandler public property The display object this plugin is for.
PluginBase::$options public property Options for this plugin will be held here.
PluginBase::$plugin_id protected property The plugin_id.
PluginBase::$usesOptions protected property Denotes whether the plugin has an additional options form. 8
PluginBase::$view public property The top object of a view. 1
PluginBase::additionalThemeFunctions public function Provide a list of additional theme functions for the theme information page
PluginBase::destroy public function Clears a plugin. 2
PluginBase::getAvailableGlobalTokens public function Returns an array of available token replacements.
PluginBase::getDefinition public function Implements Drupal\Component\Plugin\PluginInterface::getDefinition(). Overrides PluginInspectionInterface::getDefinition
PluginBase::getPluginId public function Implements Drupal\Component\Plugin\PluginInterface::getPluginId(). Overrides PluginInspectionInterface::getPluginId
PluginBase::globalTokenForm public function Adds elements for available core tokens to a form.
PluginBase::globalTokenReplace public function Returns a string with any core tokens replaced.
PluginBase::pluginTitle public function Return the human readable name of the display.
PluginBase::setOptionDefaults protected function
PluginBase::summaryTitle public function Returns the summary of the settings in the display. 6
PluginBase::themeFunctions public function Provide a full list of possible theme templates used by this style. 1
PluginBase::unpackOptions public function Unpack options over our existing defaults, drilling down into arrays so that defaults don't get totally blown away.
PluginBase::usesOptions public function Returns the usesOptions property. 8
RelationshipPluginBase::buildOptionsForm public function Default options form that provides the label widget that all fields should have. Overrides HandlerBase::buildOptionsForm 3
RelationshipPluginBase::defineOptions protected function Information about options for all kinds of purposes will be held here. @code 'option_name' => array( Overrides HandlerBase::defineOptions 3
RelationshipPluginBase::init public function Init handler to let relationships live on tables other than the table they operate on. Overrides HandlerBase::init 2
RelationshipPluginBase::label function Get this field's label.
RelationshipPluginBase::query public function Called to implement a relationship in a query. Overrides PluginBase::query 4
RelationshipPluginBase::usesGroupBy public function You can't groupby a relationship. Overrides HandlerBase::usesGroupBy