fix validation of path params on static paths

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "starlite"
-version = "1.51.2"
+version = "1.51.3"
 description = "Performant, light and flexible ASGI API Framework"
 authors = ["Na'aman Hirschfeld <[email protected]>"]
 maintainers = [

starlite/asgi/routing_trie/validate.py

@@ -1,3 +1,4 @@
+from itertools import chain
 from typing import TYPE_CHECKING
 
 from starlite.exceptions import ImproperlyConfiguredException
@@ -21,7 +22,19 @@ def validate_node(node: "RouteTrieNode") -> None:
     if node.is_asgi and bool(set(node.asgi_handlers).difference({"asgi"})):
         raise ImproperlyConfiguredException("ASGI handlers must have a unique path not shared by other route handlers.")
 
-    if node.is_mount and node.children and any(child.path_parameters for child in node.children.values()):
+    if (
+        node.is_mount
+        and node.children
+        and any(
+            v
+            for v in chain.from_iterable(
+                list(child.path_parameters.values())
+                if isinstance(child.path_parameters, dict)
+                else child.path_parameters
+                for child in node.children.values()
+            )
+        )
+    ):
         raise ImproperlyConfiguredException("Path parameters are not allowed under a static or mount route.")
 
     for child in node.children.values():