public function eager_load($target)
{
$cache = WaxModel::get_cache($this->target_model . ":" . md5(serialize($target->filters)), $this->field, $this->model->primval, false);
if (is_array($cache)) {
return new WaxModelAssociation($this->model, $target, $cache, $this->field);
}
$vals = $target->filter(array($this->join_field => $this->model->primval))->all();
WaxModel::set_cache($this->target_model . ":" . md5(serialize($target->filters)), $this->field, $this->model->primval, $vals->rowset);
return new WaxModelAssociation($this->model, $target, $vals->rowset, $this->field);
}
public function get()
{
$class = $this->target_model;
if ($cache = WaxModel::get_cache($class, $this->field, $this->model->primval)) {
return $cache;
}
$model = new $this->target_model($this->model->{$this->col_name});
if ($model->primval) {
WaxModel::set_cache($class, $this->field, $this->model->primval, $model);
return $model;
} else {
return false;
}
}
public function cache_whole_tree()
{
$class = get_class($this);
$all_nodes = $this->all();
//index the rows by their ids, as well as parents and children ids
$indexed_rowset = array();
foreach ($all_nodes->rowset as $row) {
if (!$indexed_rowset[$row['id']]['children']) {
$indexed_rowset[$row['id']]['children'] = array();
}
//cache empty children arrays too
$indexed_rowset[$row['id']]['row'] = $row;
$indexed_rowset[$row['id']]['parent_id'] = $row['parent_id'];
$indexed_rowset[$row['parent_id']]['children'][] = $row;
}
foreach ($indexed_rowset as $id => $entry) {
//set parent cache
$parent = new $class();
$parent->set_attributes($indexed_rowset[$entry['parent_id']]['row']);
WaxModel::set_cache($class, $this->parent_column, $id, $parent);
//set children cache
WaxModel::set_cache($class, $this->children_column, $id, $entry['children']);
}
}
private function lazy_load($target_model)
{
$left_field = $this->model->table . "_" . $this->model->primary_key;
$right_field = $target_model->table . "_" . $target_model->primary_key;
$this->join_model->select_columns = $right_field;
$ids = array();
if ($cache = WaxModel::get_cache(get_class($this->model), $this->field, $this->model->primval . ":" . md5(serialize($target_model->filters)), false)) {
return new WaxModelAssociation($this->model, $target_model, $cache, $this->field);
}
foreach ($this->join_model->rows() as $row) {
$ids[] = $row[$right_field];
}
WaxModel::set_cache(get_class($this->model), $this->field, $this->model->primval . ":" . md5(serialize($target_model->filters)), $ids);
return new WaxModelAssociation($this->model, $target_model, $ids, $this->field);
}