/**
* Called to add the field to a query.
*
* By default, all needed data is taken from entities loaded by the query
* plugin. Columns are added only if they are used in groupings.
*/
public function query($use_groupby = FALSE)
{
$this->get_base_table();
$entity_type = $this->definition['entity_tables'][$this->base_table];
$fields = $this->additional_fields;
// No need to add the entity type.
$entity_type_key = array_search('entity_type', $fields);
if ($entity_type_key !== FALSE) {
unset($fields[$entity_type_key]);
}
$field_definition = $this->getFieldDefinition();
if ($use_groupby) {
// Add the fields that we're actually grouping on.
$options = array();
if ($this->options['group_column'] != 'entity_id') {
$options = array($this->options['group_column'] => $this->options['group_column']);
}
$options += is_array($this->options['group_columns']) ? $this->options['group_columns'] : array();
$fields = array();
$rkey = $this->definition['is revision'] ? EntityStorageInterface::FIELD_LOAD_REVISION : EntityStorageInterface::FIELD_LOAD_CURRENT;
// Go through the list and determine the actual column name from field api.
foreach ($options as $column) {
$name = $column;
if (isset($field_definition['storage_details']['sql'][$rkey][$this->table][$column])) {
$name = $field_definition['storage_details']['sql'][$rkey][$this->table][$column];
}
$fields[$column] = $name;
}
$this->group_fields = $fields;
}
// Add additional fields (and the table join itself) if needed.
if ($this->add_field_table($use_groupby)) {
$this->ensureMyTable();
$this->addAdditionalFields($fields);
// Filter by langcode, if field translation is enabled.
$field = $field_definition;
if ($field->isTranslatable() && !empty($this->view->display_handler->options['field_langcode_add_to_query'])) {
$column = $this->tableAlias . '.langcode';
// By the same reason as field_language the field might be
// LanguageInterface::LANGCODE_NOT_SPECIFIED in reality so allow it as
// well.
// @see this::field_langcode()
$default_langcode = language_default()->id;
$langcode = str_replace(array('***CURRENT_LANGUAGE***', '***DEFAULT_LANGUAGE***'), array($this->languageManager->getCurrentLanguage(LanguageInterface::TYPE_CONTENT), $default_langcode), $this->view->display_handler->options['field_langcode']);
$placeholder = $this->placeholder();
$langcode_fallback_candidates = $this->languageManager->getFallbackCandidates($langcode, array('operation' => 'views_query', 'data' => $this));
$this->query->addWhereExpression(0, "{$column} IN({$placeholder}) OR {$column} IS NULL", array($placeholder => $langcode_fallback_candidates));
}
}
}
/**
* {@inheritdoc}
*/
public function getFallbackCandidates(array $context = array())
{
if ($this->isMultilingual()) {
$candidates = array();
if (empty($context['operation']) || $context['operation'] != 'locale_lookup') {
// If the fallback context is not locale_lookup, initialize the
// candidates with languages ordered by weight and add
// LanguageInterface::LANGCODE_NOT_SPECIFIED at the end. Interface
// translation fallback should only be based on explicit configuration
// gathered via the alter hooks below.
$candidates = array_keys($this->getLanguages());
$candidates[] = LanguageInterface::LANGCODE_NOT_SPECIFIED;
$candidates = array_combine($candidates, $candidates);
// The first candidate should always be the desired language if
// specified.
if (!empty($context['langcode'])) {
$candidates = array($context['langcode'] => $context['langcode']) + $candidates;
}
}
// Let other modules hook in and add/change candidates.
$type = 'language_fallback_candidates';
$types = array();
if (!empty($context['operation'])) {
$types[] = $type . '_' . $context['operation'];
}
$types[] = $type;
$this->moduleHandler->alter($types, $candidates, $context);
} else {
$candidates = parent::getFallbackCandidates($context);
}
return $candidates;
}
/**
* {@inheritdoc}
*/
public function getFallbackCandidates($langcode = NULL, array $context = array())
{
if ($this->isMultilingual()) {
// Get languages ordered by weight, add BaseLanguageInterface::LANGCODE_NOT_SPECIFIED
// at the end.
$candidates = array_keys($this->getLanguages());
$candidates[] = BaseLanguageInterface::LANGCODE_NOT_SPECIFIED;
$candidates = array_combine($candidates, $candidates);
// The first candidate should always be the desired language if specified.
if (!empty($langcode)) {
$candidates = array($langcode => $langcode) + $candidates;
}
// Let other modules hook in and add/change candidates.
$type = 'language_fallback_candidates';
$types = array();
if (!empty($context['operation'])) {
$types[] = $type . '_' . $context['operation'];
}
$types[] = $type;
$this->moduleHandler->alter($types, $candidates, $context);
} else {
$candidates = parent::getFallbackCandidates($langcode, $context);
}
return $candidates;
}
