/**
* Get the direction of a relationship out of a Relation instance.
*
* @param \\Orientdb\Relationship $relation
* @param \Sgpatil\Orientdb\Eloquent\Model $parent
* @param \Sgpatil\Orientdb\Eloquent\Model $related
* @return string Either 'in' or 'out'
*/
public function directionFromRelation(Relationship $relation, Model $parent, Model $related)
{
// We will match the ids of the parent model and the start node of the relationship
// and if they match we know that the direction is outgoing, incoming otherwise.
$node = $relation->getStartNode();
// We will start by considering the relationship direction to be 'incoming' until
// we match and find otherwise.
$direction = 'in';
if ($node->getId() === $parent->getKey()) {
$direction = 'out';
}
return $direction;
}
/**
* Set a given relationship on this relation.
*
* @param \\Orientdb\Relationship $relation
*/
public function setRelation(Relationship $relation, $debug = false)
{
// Set the relation object.
$this->relation = $relation;
// Replace the attributes with those brought from the given relation.
$this->attributes = $relation->getProperties();
$this->setAttribute($this->primaryKey, $relation->getId());
// Set the start and end nodes.
$this->start = $relation->getStartNode();
$this->end = $relation->getEndNode();
// Instantiate and fill out the related model.
$relatedNode = $this->isDirectionOut() ? $this->end : $this->start;
$attributes = array_merge(['id' => $relatedNode->getId()], $relatedNode->getProperties());
// This is an existing relationship.
$exists = true;
$this->related = $this->related->newFromBuilder($attributes, $exists);
$this->related->setConnection($this->related->getConnection());
}
