0.7.2: one registrant per key; metaclass-registry 0.4

CHANGELOG.md

@@ -1,5 +1,20 @@
 # Changelog
 
+## 0.7.2
+
+Requires `metaclass-registry>=0.4.0`, `objectstate>=3.0.1,<4`,
+`formbridge>=0.1.3,<0.2` and `zmqruntime>=0.6.4,<0.7`.
+
+Changed:
+
+- A widget id names one widget class. Registering a different class under an
+  id that is already taken raises `ValueError`; it used to log a warning and
+  replace the first class. The same class statement run again (a reload)
+  takes its id back.
+- A form output type has one builder: `InitializationServiceCatalog` raises
+  `ValueError` when a second builder declares an output type that already
+  has one.
+
 ## 0.7.1
 
 Requires ObjectState 3 (`objectstate>=3.0,<4`) and `formbridge>=0.1.2,<0.2`.

pyproject.toml

@@ -25,15 +25,15 @@ keywords = ["pyqt6", "forms", "reactive", "gui", "widgets", "dataclass"]
 
 dependencies = [
     "annotated-types>=0.7.0",
-    "formbridge>=0.1.2,<0.2",
+    "formbridge>=0.1.3,<0.2",
     "magicgui>=0.7.0",
-    "metaclass-registry>=0.1.5",
+    "metaclass-registry>=0.4.0",
     "PyQt6>=6.4.0",
-    "objectstate>=3.0,<4",
+    "objectstate>=3.0.1,<4",
     "psutil>=5.9",
     "Pygments>=2.15",
     "python-introspect>=0.2.6,<0.3",
-    "zmqruntime>=0.6,<0.7",
+    "zmqruntime>=0.6.4,<0.7",
 ]
 
 [project.optional-dependencies]

requirements-ci.txt

@@ -1,2 +1,3 @@
 # Source candidates needed to validate this checkout before coordinated publication.
-# Empty: every first-party dependency is released (objectstate 3.0.0, formbridge 0.1.2).
+# Empty: every first-party dependency is released (objectstate 3.0.1,
+# formbridge 0.1.3, zmqruntime 0.6.4, metaclass-registry 0.4.0).

src/pyqt_reactive/__init__.py

@@ -19,7 +19,7 @@
 - Cross-window reactive updates
 """
 
-__version__ = "0.7.1"
+__version__ = "0.7.2"
 
 # Public API will be populated as modules are added
 __all__ = [

src/pyqt_reactive/forms/form_init_service.py

@@ -400,6 +400,11 @@ def __init__(self) -> None:
     def builder_for(self, output_type: Type, service_name: str):
         """Decorator to register builder function and auto-generate service class."""
         def decorator(func: Callable) -> Callable:
+            if output_type in self._builders_by_output:
+                raise ValueError(
+                    f"{output_type.__qualname__} already has a builder "
+                    f"({self._builders_by_output[output_type].service_name})."
+                )
             self._builders_by_output[output_type] = BuilderSpec(output_type, service_name, func)
             return func
         return decorator

src/pyqt_reactive/forms/widget_registry.py

@@ -64,12 +64,17 @@ def __new__(cls, name, bases, attrs):
                 logger.debug(f"Skipping registration for {name} - no _widget_id attribute")
                 return new_class
 
-            # Check for duplicate registration
-            if widget_id in WIDGET_IMPLEMENTATIONS:
-                existing = WIDGET_IMPLEMENTATIONS[widget_id]
-                logger.warning(
-                    f"Widget ID '{widget_id}' already registered to {existing.__name__}. "
-                    f"Overwriting with {name}."
+            # A widget id names one widget class. The same class statement
+            # run again (a reload) takes its id back.
+            existing = WIDGET_IMPLEMENTATIONS.get(widget_id)
+            if existing is not None and (
+                existing.__module__ != new_class.__module__
+                or existing.__qualname__ != new_class.__qualname__
+            ):
+                raise ValueError(
+                    f"Widget ID '{widget_id}' is already registered to "
+                    f"{existing.__module__}.{existing.__qualname__}; "
+                    f"{new_class.__module__}.{new_class.__qualname__} cannot use it too."
                 )
 
             # Auto-register in global registry