->getLinks() -- load related objects
Описание
Loads the all the related objects into the main object, by using the links.ini
relationships, and sets the calling objects variables with the row name prefixed
with an underscode (_) to the resulting objects.
Using this with the earlier column naming convention is depreciated, and links.ini
files should be used.
Параметр
string $variableFormat - the default behavior is to assign the resulting
objects to variables with the row name prefixed with an underscode (_), however,
you can use this value to format the variable differently
Пример 35-1. examples of formaters
if room.occupied_by is linked to a person.id
without a modifier - eg _%s
results in the equivilant of
$object->_occupied_by = $object->getLink('occupied_by');
with a modifier - eg link_%s
results in the equivilant of
$object->link_occupied_by = $object->getLink('occupied_by'); |
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Возвращаемое значение
boolean - TRUE on success and FALSE on failure
Заметка
Эта функция не должна вызываться статически.
Пример
Пример 35-2. Two Example Tables
Person
+---------------+---------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+---------------+------+-----+---------+----------------+
| id | mediumint(9) | | PRI | 0 | auto_increment |
| first_name | varchar(80) | YES | | NULL | |
| last_name | varchar(80) | | MUL | | |
| middle_name | varchar(80) | YES | | NULL | |
| badge_number | smallint(6) | YES | | NULL | |
| street | varchar(80) | YES | | NULL | |
| city | varchar(80) | YES | | NULL | |
| state | varchar(80) | YES | | NULL | |
| zip | varchar(15) | YES | | NULL | |
| phone | varchar(15) | YES | | NULL | |
| reg_type | varchar(80) | YES | | NULL | |
| judge | varchar(10) | YES | | NULL | |
| staff | varchar(10) | YES | | NULL | |
| volunteer | varchar(10) | YES | | NULL | |
| rpga_number | mediumint(9) | YES | | NULL | |
| total_fee | float(10,2) | YES | | NULL | |
| email_address | varchar(80) | YES | | NULL | |
| country | varchar(30) | YES | | NULL | |
| convention_id | int(11) | | | 0 | |
| last_modified | timestamp(14) | YES | | NULL | |
+---------------+---------------+------+-----+---------+----------------+
Convention
+----------------------+---------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------------+---------------+------+-----+---------+----------------+
| id | int(11) | | PRI | 0 | auto_increment |
| name | varchar(50) | | | | |
| sponsor_organization | varchar(50) | | | | |
| rpga_convention_code | varchar(20) | | | | |
| web_site_url | varchar(200) | | | | |
| last_modified | timestamp(14) | YES | | NULL | |
| room_id | int(11) | | | | |
+----------------------+---------------+------+-----+---------+----------------+
Room
+----------------------+---------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------------+---------------+------+-----+---------+----------------+
| room_id | int(11) | | PRI | 0 | auto_increment |
| name | varchar(50) | | | | |
+----------------------+---------------+------+-----+---------+----------------+ |
|
Пример 35-5. Resulting Output
Object:dataobjects_person Object
(
[_DB_DataObject_version] => 1.0
[__table] => person
[_database_dsn] =>
[_database_dsn_md5] => 3974043abbccdd6412fb156a1d10b98377
[_database] => testing
[_condition] =>
[_group_by] =>
[_order_by] =>
[_limit] =>
[_data_select] => *
[_link_loaded] => 1
[_lastError] => pear_error Object
(
[error_message_prefix] =>
[mode] => 1
[level] => 1024
[code] => -3
[message] => getLink:Could not find class for row last_modified, table last
[userinfo] =>
[callback] =>
)
[id] => 1079
[N] => 1
[_DB_resultid] => 2
[first_name] => Tim
[last_name] => White
[middle_name] =>
[badge_number] => 123
[street] => 334411 N Washington
[city] => Texas
[state] => CO
[zip] => 12345
[phone] => 343412323232
[reg_type] => Staff
[judge] =>
[staff] => CHECKED
[volunteer] =>
[rpga_number] => 1232323
[total_fee] => 0.00
[email_address] => tim@example.com
[country] => USA
[convention_id] => 1
[last_modified] => 20020711084539
[_first_name] =>
[_last_name] =>
[_middle_name] =>
[_badge_number] =>
[_reg_type] =>
[_rpga_number] =>
[_total_fee] =>
[_email_address] =>
[_convention_id] => dataobjects_convention Object
(
[_DB_DataObject_version] => 1.0
[__table] => convention
[_database_dsn] =>
[_database_dsn_md5] => 3974043abbcc86412fb156a1d10b98377
[_database] => testing
[_condition] =>
[_group_by] =>
[_order_by] =>
[_limit] =>
[_data_select] => *
[_link_loaded] =>
[_lastError] =>
[id] => 1
[N] => 1
[_DB_resultid] => 3
[name] => ABCD XYZ
[sponsor_organization] => some sponser
[rpga_convention_code] => ABCD_XYZ
[web_site_url] => http://example.com
[last_modified] => 20020703143828
[room_id] => 1
)
[_last_modified] =>
)
** Note, This error: [message] => getLink:Could not find class for row last_modified, table last
is caused by the original link code using {tablename}_{colname} for guessing links, this automated linking should be ignored, and not used, as it is depreciated. |
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Пример 35-6. Example with three tables join
/**
* The following example show a three tables join.
*
* More joins can be nested as you see fit.
*/
$person = new DataObjects_Person;
$data = array();
if ($person->find()) {
while ($person->fetch()) {
$person->getLinks();
// Following is another call to getLinks for the second join
$person->_convention_id->getLinks();
$data[] = $person->_convention_id->_room_id->ToArray();
}
}
print_r($data); |
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