Fix order of meta wrapping components.

Author: T4rk1n

dash/development/base_component.py

@@ -52,11 +52,20 @@ class ComponentMeta(abc.ABCMeta):
     # pylint: disable=arguments-differ
     def __new__(mcs, name, bases, attributes):
         module = attributes["__module__"].split(".")[0]
+
+        if attributes.get("_explicitize_dash_init", False):
+            # We only want to patch the new generated component without
+            # the `@_explicitize_args` decorator for mypy support
+            # See issue: https://github.com/plotly/dash/issues/3226
+            attributes["__init__"] = _explicitize_args(attributes["__init__"])
+
+        _component = abc.ABCMeta.__new__(mcs, name, bases, attributes)
+
         if name == "Component" or module == "builtins":
-            # Don't do the base component
+            # Don't add to the registry the base component
             # and the components loaded dynamically by load_component
             # as it doesn't have the namespace.
-            return abc.ABCMeta.__new__(mcs, name, bases, attributes)
+            return _component
 
         _namespace = attributes.get("_namespace", module)
         ComponentRegistry.namespace_to_package[_namespace] = module
@@ -65,13 +74,7 @@ def __new__(mcs, name, bases, attributes):
             "_children_props"
         )
 
-        if attributes.get("_explicitize_dash_init", False):
-            # We only want to patch the new generated component without
-            # the `@_explicitize_args` decorator for mypy support
-            # See issue: https://github.com/plotly/dash/issues/3226
-            attributes["__init__"] = _explicitize_args(attributes["__init__"])
-
-        return abc.ABCMeta.__new__(mcs, name, bases, attributes)
+        return _component
 
 
 def is_number(s):

tests/unit/development/metadata_test.py

@@ -3,7 +3,7 @@
 import typing  # noqa: F401
 import numbers # noqa: F401
 from typing_extensions import TypedDict, NotRequired, Literal # noqa: F401
-from dash.development.base_component import Component, _explicitize_args
+from dash.development.base_component import Component
 try:
     from dash.development.base_component import ComponentType # noqa: F401
 except ImportError:
@@ -131,7 +131,8 @@ class Table(Component):
         }
     )
 
-    @_explicitize_args
+    _explicitize_dash_init = True
+
     def __init__(
         self,
         children: typing.Optional[typing.Union[str, int, float, ComponentType, typing.Sequence[typing.Union[str, int, float, ComponentType]]]] = None,