Fix ClosureTree to use static::getConnection() instead of static::$dbconnection

Author: Nik Barham

src/Automatorm/Orm/Traits/ClosureTree.php

@@ -24,7 +24,7 @@ protected function setClosureTable($table)
 
 	public function createInitialClosure()
 	{
-		$query = new Query(static::$dbconnection);
+		$query = new Query(static::getConnection());
 		$query->sql(QueryBuilder::insert($this->closureTable, ['parent_id' => $this->id, 'child_id' => $this->id, 'depth' => 0]));
 		$query->execute();
 	}
@@ -33,7 +33,7 @@ public function addParent(self $parent)
 	{
 		$table = $this->closureTable;
 
-		$query = new Query(static::$dbconnection);
+		$query = new Query(static::getConnection());
 		$query->sql(" 
 			INSERT INTO $table (parent_id, child_id, depth)
 			SELECT p.parent_id, c.child_id, p.depth+c.depth+1
@@ -47,7 +47,7 @@ public function removeParent(self $parent)
 	{
 		$table = $this->closureTable;
 
-		$query = new Query(static::$dbconnection);
+		$query = new Query(static::getConnection());
 		$query->sql(" 
 			DELETE FROM $table WHERE id IN(
 				SELECT a.id FROM (
@@ -68,7 +68,7 @@ public function changeParent(self $oldparent, self $newparent)
 
 	public function _property_parents()
 	{
-		$query = new Query(static::$dbconnection);
+		$query = new Query(static::getConnection());
 		$query->sql(
 			QueryBuilder::select($this->closureTable, ['parent_id'])->where(['child_id' => $this->id, 'depth' => 1])
 		);
@@ -82,7 +82,7 @@ public function _property_parents()
 
 	public function _property_children()
 	{
-		$query = new Query(static::$dbconnection);
+		$query = new Query(static::getConnection());
 		$query->sql(
 			QueryBuilder::select($this->closureTable, ['child_id'])->where(['parent_id' => $this->id, 'depth' => 1])
 		);