Make ForbiddenExtraKeysError.__str__ deterministic (#670)

AlexWaygood · web-flow · commit 591b4f77bec5 · 2025-07-06T22:15:44.000+02:00
diff --git a/src/cattrs/errors.py b/src/cattrs/errors.py
@@ -134,5 +134,5 @@ def __str__(self) -> str:
         return (
             self.message
             or f"Extra fields in constructor for {self.cl.__name__}: "
-            f"{', '.join(self.extra_fields)}"
+            f"{', '.join(sorted(self.extra_fields))}"
         )

Original file line number	Diff line number	Diff line change
`@@ -134,5 +134,5 @@ def __str__(self) -> str:`
`134`	`134`	`return (`
`135`	`135`	`self.message`
`136`	`136`	`or f"Extra fields in constructor for {self.cl.__name__}: "`
`137`		`- f"{', '.join(self.extra_fields)}"`
	`137`	`+ f"{', '.join(sorted(self.extra_fields))}"`
`138`	`138`	`)`