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doctrine2/manual/new/docs/en/working-with-objects/dealing-with-relations.txt

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+++ Creating related records
When accessing related records and if those records do not exists Doctrine automatically creates new records.
<code type="php">
// NOTE: related record have always the first letter in uppercase
$email = $user->Email;
$email->address = 'jackdaniels@drinkmore.info';
$user->save();
// alternative:
$user->Email->address = 'jackdaniels@drinkmore.info';
$user->save();
</code>
+++ Retrieving related records
You can retrieve related records by the very same {{Doctrine_Record}} methods you've already propably used for accessing record properties. When accessing related record you just simply use the class names.
<code type="php">
print $user->Email['address'];
print $user->Phonenumber[0]->phonenumber;
print $user->Group[0]->name;
</code>
+++ Updating related records
You can update the related records by calling save for each related object / collection individually or by calling save on the object that owns the other objects. You can also call {{Doctrine_Connection::flush}} which saves all pending objects.
<code type="php">
$user->Email['address'] = 'koskenkorva@drinkmore.info';
$user->Phonenumber[0]->phonenumber = '123123';
$user->save();
// saves the email and phonenumber
</code>
+++ Deleting related records
You can delete related records individually be calling {{delete()}} on each record. If you want to delete a whole record graph just call delete on the owner record.
<code type="php">
$user->Email->delete();
$user->Phonenumber[3]->delete();
// deleting user and all related objects:
$user->delete();
</code>
+++ Working with associations