added shorthand method property relationship

Author: transistive

src/Formatter/Specialised/HttpOGMArrayTranslator.php

@@ -13,16 +13,16 @@
 
 namespace Laudis\Neo4j\Formatter\Specialised;
 
-use Laudis\Neo4j\Types\Path;
-use Laudis\Neo4j\Types\UnboundRelationship;
 use function is_array;
 use Laudis\Neo4j\Contracts\PointInterface;
 use Laudis\Neo4j\Types\Cartesian3DPoint;
 use Laudis\Neo4j\Types\CartesianPoint;
 use Laudis\Neo4j\Types\CypherList;
 use Laudis\Neo4j\Types\CypherMap;
 use Laudis\Neo4j\Types\Node;
+use Laudis\Neo4j\Types\Path;
 use Laudis\Neo4j\Types\Relationship;
+use Laudis\Neo4j\Types\UnboundRelationship;
 use Laudis\Neo4j\Types\WGS843DPoint;
 use Laudis\Neo4j\Types\WGS84Point;
 
@@ -153,7 +153,7 @@ private function path(array $meta, array $nodes, array $relationships, int $relI
     }
 
     /**
-     * @param list<NodeArray>     $nodes
+     * @param list<NodeArray> $nodes
      */
     private function translateNode(array $nodes, int $id): Node
     {

src/Types/Relationship.php

@@ -13,6 +13,9 @@
 
 namespace Laudis\Neo4j\Types;
 
+use Laudis\Neo4j\Exception\PropertyDoesNotExistException;
+use function sprintf;
+
 /**
  * A Relationship class representing a Relationship in cypher.
  *
@@ -106,4 +109,18 @@ public function toArray(): array
             'properties' => $this->getProperties(),
         ];
     }
+
+    /**
+     * Gets the property of the relationship by key.
+     *
+     * @return OGMTypes
+     */
+    public function getProperty(string $key)
+    {
+        if (!$this->properties->hasKey($key)) {
+            throw new PropertyDoesNotExistException(sprintf('Property "%s" does not exist on relationship', $key));
+        }
+
+        return $this->properties->get($key);
+    }
 }