RedBeanPHP\QueryWriter\AQueryWriter::writeJoin PHP Method

    public function writeJoin($type, $targetType, $leftRight = 'LEFT')
    {
        if ($leftRight !== 'LEFT' && $leftRight !== 'RIGHT' && $leftRight !== 'INNER') {
            throw new RedException('Invalid JOIN.');
        }
        $table = $this->esc($type);
        $targetTable = $this->esc($targetType);
        $field = $this->esc($targetType, TRUE);
        return " {$leftRight} JOIN {$targetTable} ON {$targetTable}.id = {$table}.{$field}_id ";
    }