fix ParamType.to_info_dict() with no name

1 files changed, 8 insertions, 1 deletions

diff --git a/src/click/types.py b/src/click/types.py
index aab0656..3a78a3a 100644
--- a/src/click/types.py
+++ b/src/click/types.py
@@ -63,7 +63,14 @@ class ParamType:
         # The class name without the "ParamType" suffix.
         param_type = type(self).__name__.partition("ParamType")[0]
         param_type = param_type.partition("ParameterType")[0]
-        return {"param_type": param_type, "name": self.name}
+
+        # Custom subclasses might not remember to set a name.
+        if hasattr(self, "name"):
+            name = self.name
+        else:
+            name = param_type
+
+        return {"param_type": param_type, "name": name}
 
     def __call__(
         self,