fix: Fix detecting whether an object should be an alias during inspec…

…tion

Issue #180: #180

src/griffe/agents/inspector.py

@@ -174,8 +174,12 @@ def get_module(self, import_paths: Sequence[str | Path] | None = None) -> Module
         if self.parent is not None:
             import_path = f"{self.parent.path}.{import_path}"
         value = dynamic_import(import_path, import_paths)
-        top_node = ObjectNode(value, self.module_name)
-        self.inspect(top_node)
+        parent = None
+        if self.parent is not None:
+            for part in self.parent.path.split("."):
+                parent = ObjectNode(None, name=part, parent=parent)
+        module_node = ObjectNode(value, self.module_name, parent=parent)
+        self.inspect(module_node)
         return self.current.module
 
     def inspect(self, node: ObjectNode) -> None:

src/griffe/agents/nodes/_runtime.py

@@ -314,6 +314,8 @@ def alias_target_path(self) -> str | None:
         # - but break special cycles coming from builtin modules
         #   like ast -> _ast -> ast (here we inspect _ast)
         #   or os -> posix/nt -> os (here we inspect posix/nt)
+        if self.parent is None:
+            return None
 
         obj = self.obj
         if isinstance(obj, cached_property):
@@ -326,9 +328,6 @@ def alias_target_path(self) -> str | None:
         if not child_module:
             return None
 
-        if self.parent is None:
-            return None
-
         if self.parent.is_module:
             parent_module = self.parent.obj
         else: