override add_custom_constraint_class

sdv/sequential/par.py

@@ -182,6 +182,10 @@ def load_custom_constraint_classes(self, filepath, class_names):
         """Error that tells the user custom constraints can't be used in the ``PARSynthesizer``."""
         raise SynthesizerInputError('The PARSynthesizer cannot accommodate custom constraints.')
 
+    def add_custom_constraint_class(self, class_object, class_name):
+        """Error that tells the user custom constraints can't be used in the ``PARSynthesizer``."""
+        raise SynthesizerInputError('The PARSynthesizer cannot accommodate custom constraints.')
+
     def _validate_context_columns(self, data):
         errors = []
         if self.context_columns:

tests/unit/sequential/test_par.py

@@ -185,6 +185,19 @@ def test_load_custom_constraint_classes(self):
         with pytest.raises(SynthesizerInputError, match=error_message):
             synthesizer.load_custom_constraint_classes(filepath='test', class_names=[])
 
+    def test_add_custom_constraint_class(self):
+        """Test that if custom constraint is being added, an error is raised."""
+        # Setup
+        metadata = self.get_metadata()
+        synthesizer = PARSynthesizer(metadata=metadata)
+
+        # Run and Assert
+        error_message = re.escape(
+            'The PARSynthesizer cannot accommodate custom constraints.'
+        )
+        with pytest.raises(SynthesizerInputError, match=error_message):
+            synthesizer.add_custom_constraint_class(Mock(), class_name='Mock')
+
     def test_get_parameters(self):
         """Test that it returns every ``init`` parameter without the ``metadata``."""
         # Setup