CodeIgniter Multidimensional Object - ActiveRecord - codeigniter

Question

I have an object called 'events', that's created via $data['events'] = function (the function pulls information out of an events table and others using active record).
The events object looks like:
Array
(
[0] => stdClass Object
(
[id] => 2
[course_name] => Course 3
[course_description] => Course
[course_price] => 995
[supplier_name] => Supplier 3
[location_country_code] => GB
[location_country] => United Kingdom
[location_city] => London
[venue_name] => Venue 2
[venue_address] => 2 Street
[venue_postcode] => EC2M 7PQ
[venue_city] => London
[venue_county] =>
[venue_country] => United Kingdom
[venue_locality] =>
[event_type] => Materials Only
[event_status] => Confirmed
[course_id] => 2
[event_duration] => 3
[event_start_date] => 2013-09-12
[event_date_added] => 2013-02-26 14:36:06
[event_status_id] => 2
[event_type_id] => 4
[tutor_id] => 0
[tutor_confirmed] => 0
[event_featured] => 0
[event_push] => 0
[event_active] => 0
[invigilator_id] => 0
[event_discount] =>
[event_max_delegates] => 16
[location_id] => 1
[venue_id] => 1
[supplier_id] => 2
)
[1] => stdClass Object
(
[id] => 1
[course_name] => Course Name
[course_description] => Course Description
[course_price] => 995
[supplier_name] => Supplier 1
[location_country_code] => GB
[location_country] => United Kingdom
[location_city] => London
[venue_name] => Venue Name
[venue_address] => Street
[venue_postcode] => EC2M 7PQ
[venue_city] => London
[venue_county] =>
[venue_country] => United Kingdom
[venue_locality] =>
[event_type] => Private Venue
[event_status] => Provisional
[course_id] => 1
[event_duration] => 3
[event_start_date] => 2013-11-13
[event_date_added] => 2013-02-26 09:56:17
[event_status_id] => 1
[event_type_id] => 3
[tutor_id] => 0
[tutor_confirmed] => 0
[event_featured] => 0
[event_push] => 0
[event_active] => 0
[invigilator_id] => 0
[event_discount] => 395
[event_max_delegates] => 16
[location_id] => 1
[venue_id] => 1
[supplier_id] => 1
)
)
I'd like to add a nested object under the key 'delegates' for each row using ActiveRecord, that pulls through the delegates attached to the event using a bridge table 'events_delegates_bridge' by comparing the 'event_id' and 'delegate_id columns in that table.
Essentially so that the object looks like so:
Array
(
[0] => stdClass Object
(
[id] => 2
[course_name] => Course 3
[delegates] => Array
(
[0] => stdClass Object
(
[id] => 1
[name] => Joe Bloggs
)
[1] => stdClass Object
(
[id] => 2
[name] => Joe Smith
)
[3] => stdClass Object
(
[id] => 3
[name] => Jane Doe
)
)
[course_description] => Course
[course_price] => 995
[supplier_name] => Supplier 3
[location_country_code] => GB
[location_country] => United Kingdom
[location_city] => London
[venue_name] => Venue 2
[venue_address] => 2 Street
[venue_postcode] => EC2M 7PQ
[venue_city] => London
[venue_county] =>
[venue_country] => United Kingdom
[venue_locality] =>
[event_type] => Materials Only
[event_status] => Confirmed
[course_id] => 2
[event_duration] => 3
[event_start_date] => 2013-09-12
[event_date_added] => 2013-02-26 14:36:06
[event_status_id] => 2
[event_type_id] => 4
[tutor_id] => 0
[tutor_confirmed] => 0
[event_featured] => 0
[event_push] => 0
[event_active] => 0
[invigilator_id] => 0
[event_discount] =>
[event_max_delegates] => 16
[location_id] => 1
[venue_id] => 1
[supplier_id] => 2
)
)
Any ideas how best to achieve this? Thanks.
Event Model
class Event_Model extends CI_Model {
public function get_events() {
$this->db->select( '*' );
$this->db->from( 'courses' );
$this->db->from( 'suppliers' );
$this->db->from( 'locations' );
$this->db->from( 'venues' );
$this->db->from( 'event_type' );
$this->db->from( 'event_status' );
$this->db->join( 'events', 'events.course_id = courses.id AND events.supplier_id = suppliers.id AND events.location_id = locations.id AND events.venue_id = venues.id AND events.event_type_id = event_type.id AND events.event_status_id = event_status.id', 'inner' );
$this->db->order_by( 'events.event_start_date', 'asc' );
$query = $this->db->get();
return $query->result();
}
}
Dashboard Controller
$data['events'] = $this->event_model->get_events();
Delegates Model
I've created this to get the delegate data. Do you think it can be used to add the correct delegates to the events object?
class Delegate_Model extends CI_Model {
public function get_delegates() {
$this->db->select( '*' );
$this->db->from( 'delegates' );
$this->db->from( 'events_delegates_bridge' );
$this->join( 'delegates', 'delegates.id = events_delegates_bridge.delegate_id', 'inner' );
$query = $this->db->get();
return $query->result();
}
}
Just tested this and it shows a blank page.

Answer 1

You're best off doing it with 2 separate queries.
$events = array();
$result = $this->db->query('SELECT * FROM events WHERE ...');
foreach($result->result_array() as $event) {
$events[$event['id']] = $event;
}
$result = $this->db->query('
SELECT * FROM events_delegates_bridge
JOIN delegates ON (delegate_id = delegates.id)
WHERE ...
');
foreach($result->result_array() as $delegate) {
if (!empty($events[$delegate['event_id']])) {
$events[$delegate['event_id']]['delegates'][] = $delegate
}
}
This bit of code just queries the events and puts them in an array indexed by the event id.
Then, a separate query runs to pull up the delegates, and attaches them to the appropriate event.

Answer 2

use $name=$variable->result_array();var_dump($name); I think This work