adds ctx

Author: pcrespov

packages/models-library/src/models_library/errors_classes.py

@@ -30,3 +30,7 @@ def _get_full_class_name(cls) -> str:
             )
         ]
         return ".".join(reversed(relevant_classes))
+
+    def ctx(self):
+        """Returns context stored in the exception"""
+        return dict(**self.__dict__)

packages/models-library/tests/test_errors_classes.py

@@ -148,3 +148,14 @@ class MyErrorAfter(OsparcErrorMixin, ValueError):
         msg_template = "{value} and {missing}"
 
     assert str(MyErrorAfter(value=42)) == "42 and 'missing=?'"
+
+
+def test_exception_context():
+    class MyError(OsparcErrorMixin, ValueError):
+        msg_template = "{value} and {missing}"
+
+    exc = MyError(value=42, missing="foo", extra="bar")
+    assert exc.ctx() == {"value": 42, "missing": "foo", "extra": "bar"}
+
+    exc = MyError(value=42)
+    assert exc.ctx() == {"value": 42}