getSingleRelationship() returns object, but relationship methods are not working on that object

[agoransson]

Hey, I'm having a very strange issue I think. The following code causes exceptions for me.

  $relationship = $node->getSingleRelationship('USES', 'OUT');
  return $relationship->getStartNode();

However, getting all the USES relationships works without trouble. I can't quite figure out why the single relationship wont work. Especially since the getSingleRelationship method overloads the getRelationships method.

    "error": {
      "type": "Symfony\\Component\\Debug\\Exception\\FatalErrorException",
      "message": "Call to a member function getStartNode() on a non-object",
      ...  
    }

[agoransson]

Turns out when I changed the create statement to create unique USES relationship it works.