Copy a Doctrine object with all relations - php

Question

I want to copy a record with all his relations.
I'm trying with:
$o = Doctrine::getTable('Table')->Find(x);
$copy = $object->copy();
$relations = $o->getRelations();
foreach ($relations as $name => $relation) {
$copy->$relation = $object->$relation->copy();
}
$copy->save();
This code doesn't works, but I think it's on the way.

Answer 1

I never could get the deep copy function to operate correctly.
I manually coded a deep copy function for one of my models like this
public function copyAndSave ()
{
$filters = array('id', 'created');
$survey = $this->copy();
$survey->Survey_Entries = new Doctrine_Collection("Survey_Model_Entry");
$survey->Assignment_Assignments = new Doctrine_Collection("Assignment_Model_Assignment");
$survey->Survey_Questions = new Doctrine_Collection("Survey_Model_Question");
$survey->save();
foreach ($this->Survey_Questions as $question)
{
$answers = $question->Survey_Answers;
$newQuestion = $question->copy();
$newQuestion->survey_surveys_id = $survey->id;
$newQuestion->save();
$newAnswers = new Doctrine_Collection("Survey_Model_Answer");
foreach($answers as $answer)
{
$answer = $answer->copy();
$answer->save();
$answer->survey_questions_id = $newQuestion->id;
$newAnswers->add($answer);
}
$newQuestion->Survey_Answers = $newAnswers;
$survey->Survey_Questions->add($newQuestion);
}
return $survey->save();
}

Answer 2

You can read about copy() here. It takes an optional parameter $deep:
$deep
whether to duplicates the objects targeted by the relations
So
$copy = $object->copy(true);
should do it.

Answer 3

Sorry if I'm resurrecting this thread...
I found myself in search of a solution recently where I needed to copy a record and retain the references of the original. A deep copy $record->copy(true) copies the references, which was no good for me. This was my solution:
$record = Doctrine_Core::getTable('Foo')->find(1);
$copy = $record->copy();
foreach($record->getTable()->getRelations() as $relation) {
if ($relation instanceof Doctrine_Relation_Association) {
$ids = array();
foreach ($relation->fetchRelatedFor($record) as $r) {
$ids[] = $r->getId();
}
$copy->link($relation->getAlias(), $ids);
}
}
if ($copy->isValid()) {
$copy->save();
}
Hope this helps :)

Answer 4

This is how i done, but some fix is needed.
$table = $entidade->getTable();
$relations = $table->getRelations();
foreach($relations as $relation => $data) {
try {
$entity->loadReference($relation);
} catch(Exception $e) {
die($e->getMessage());
}
}

Answer 5

I am using Symfony1.4.1 and that uses Doctrine 1.2.1 (I think).
I have been trying to make a function that did all the above myself, when I found one that already exists.
Try this in any function and look at the results:
$tmp=$this->toArray(TRUE);
var_dump($tmp);
$this->refreshRelated();
$tmp=$this->toArray();
var_dump($tmp);
$tmp=$this->toArray(TRUE);
var_dump($tmp);
exit();
I am going to try two different things:
A/ put $this->refreshRelated() into the constructor of all my model objects.
B/ write a function that takes an array depicting the object graph that I want populated. Calling the function refereshRelatedGraph($objectGraphArray). With the right structure of the array (having all the appropriate relation names at each level), I could control which relations get populated and which don't. One use for this is to populate only children, not parent relations. The other is for when a ERD/Schema/ObjectGraph has an element that is 'owned' by more than one object (many to many, other special circumstances that I have), I could control which side of the relationships get pre(non lazy) loaded.