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<?php
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/**
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* @file
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* Definition of views_handler_field_entity.
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*/
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/**
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* A handler to display data from entity objects.
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*
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* Fields based upon this handler work with all query-backends if the tables
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* used by the query backend have an 'entity type' specified. In order to
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* make fields based upon this handler automatically available to all compatible
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* query backends, the views field can be defined in the table.
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* @code views_entity_{ENTITY_TYPE} @endcode.
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*
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* @ingroup views_field_handlers
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*/
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class views_handler_field_entity extends views_handler_field {
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/**
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* Stores the entity type which is loaded by this field.
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*/
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public $entity_type;
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/**
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* Stores all entites which are in the result.
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*/
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public $entities;
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/**
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* The base field of the entity type assosiated with this field.
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*/
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public $base_field;
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/**
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* Initialize the entity type.
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*/
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public function init(&$view, &$options) {
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parent::init($view, $options);
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// Initialize the entity-type used.
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$table_data = views_fetch_data($this->table);
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if (isset($table_data['table']['entity type'])) {
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$this->entity_type = $table_data['table']['entity type'];
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}
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}
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/**
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* Overriden to add the field for the entity id.
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*/
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public function query() {
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$this->table_alias = $base_table = $this->view->base_table;
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$this->base_field = $this->view->base_field;
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if (!empty($this->relationship)) {
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foreach ($this->view->relationship as $relationship) {
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if ($relationship->alias == $this->relationship) {
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$base_table = $relationship->definition['base'];
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$this->table_alias = $relationship->alias;
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$table_data = views_fetch_data($base_table);
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$this->base_field = empty($relationship->definition['base field']) ? $table_data['table']['base']['field'] : $relationship->definition['base field'];
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}
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}
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}
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// Add the field if the query back-end implements an add_field() method,
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// just like the default back-end.
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if (method_exists($this->query, 'add_field')) {
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$this->field_alias = $this->query->add_field($this->table_alias, $this->base_field, '');
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}
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$this->add_additional_fields();
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}
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/**
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* Load the entities for all rows that are about to be displayed.
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*/
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public function pre_render(&$values) {
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if (!empty($values)) {
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list($this->entity_type, $this->entities) = $this->query->get_result_entities($values, !empty($this->relationship) ? $this->relationship : NULL, $this->field_alias);
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}
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}
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/**
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* Return the entity object or a certain property of the entity.
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*/
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public function get_value($values, $field = NULL) {
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if (isset($this->entities[$this->view->row_index])) {
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$entity = $this->entities[$this->view->row_index];
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// Support to get a certain part of the entity.
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if (isset($field) && isset($entity->{$field})) {
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return $entity->{$field};
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}
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// Support to get a part of the values as the normal get_value.
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elseif (isset($field) && isset($values->{$this->aliases[$field]})) {
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return $values->{$this->aliases[$field]};
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}
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else {
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return $entity;
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}
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}
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return FALSE;
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}
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}
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