Merge now filters away invalid keys

src/Record.php

@@ -252,11 +252,14 @@ public function make(array $init = []) {
      */
     public function merge($mergee) {
         $data = $this->_recordData;
+        $fields = $this->getFields();
         $record = new static($this->_validator);
 
         foreach ($mergee as $key => $value) {
-            $record->validate($key, $value);
-            $data[$key] = $value;
+            if (in_array($key, $fields)) {
+                $record->validate($key, $value);
+                $data[$key] = $value;
+            }
         }
 
         $record->force($data);

tests/RecordTest.php

@@ -176,6 +176,21 @@ public function test_that_it_merges_with_an_array()
         $this->assertEquals(456, $record->get("baz"));
     }
 
+    public function test_that_merging_filters_invalid_keys()
+    {
+        $record = new TestWithDefaultsRecord;
+
+        $record = $record->merge([
+            "foo" => "Foo",
+            "bar" => "Bar",
+            "qux" => "IGNORE",
+        ]);
+
+        $this->assertEquals("Foo", $record->get("foo"));
+        $this->assertEquals("Bar", $record->get("bar"));
+        $this->assertEquals(456, $record->get("baz"));
+    }
+
     public function test_that_it_merges_with_another_record()
     {
         $record = new TestWithDefaultsRecord;