Some fixes / improvements

core/Driver/SQL/Constraint/Constraint.class.php

@@ -4,13 +4,11 @@ namespace Driver\SQL\Constraint;
 
 abstract class Constraint {
 
-  private $columnName;
+  private array $columnNames;
 
-  public function __construct($columnName) {
-    $this->columnName = $columnName;
+  public function __construct($columnNames) {
+    $this->columnNames = (!is_array($columnNames) ? array($columnNames) : $columnNames);
   }
 
-  public function getColumnName() { return $this->columnName; }
-};
-
-?>
+  public function getColumnNames() { return $this->columnNames; }
+}

core/Driver/SQL/Constraint/ForeignKey.class.php

@@ -2,11 +2,13 @@
 
 namespace Driver\SQL\Constraint;
 
+use Driver\SQL\Strategy\Strategy;
+
 class ForeignKey extends Constraint {
 
-  private $referencedTable;
-  private $referencedColumn;
-  private $strategy;
+  private string $referencedTable;
+  private string $referencedColumn;
+  private ?Strategy $strategy;
 
   public function __construct($name, $refTable, $refColumn, $strategy = NULL) {
     parent::__construct($name);
@@ -18,6 +20,4 @@ class ForeignKey extends Constraint {
   public function getReferencedTable() { return $this->referencedTable; }
   public function getReferencedColumn() { return $this->referencedColumn; }
   public function onDelete() { return $this->strategy; }
-};
-
-?>
+}

core/Driver/SQL/Constraint/PrimaryKey.class.php

@@ -8,6 +8,4 @@ class PrimaryKey extends Constraint {
     parent::__construct((!empty($names) && is_array($names[0])) ? $names[0] : $names);
   }
 
-};
-
-?>
+}

core/Driver/SQL/Constraint/Unique.class.php

@@ -8,6 +8,4 @@ class Unique extends Constraint {
     parent::__construct((!empty($names) && is_array($names[0])) ? $names[0] : $names);
   }
 
-};
-
-?>
+}