feat(base): add redirect_slashes option to mount_to method

Add optional redirect_slashes parameter to BaseAdmin.mount_to() and propagate it to SQLAlchemy Admin class.
This allows users to control whether trailing slashes in URLs should be redirected, providing more flexibility in URL handling.

Signed-off-by: Noam Stolero <noam@factify.com>

starlette_admin/base.py

@@ -524,7 +524,11 @@ async def form_to_dict(
             data[field.name] = await field.parse_form_data(request, form_data, action)
         return data
 
-    def mount_to(self, app: Starlette) -> None:
+    def mount_to(
+        self,
+        app: Starlette,
+        redirect_slashes: bool = True,
+    ) -> None:
         admin_app = Starlette(
             routes=self.routes,
             middleware=self.middlewares,
@@ -537,3 +541,4 @@ def mount_to(self, app: Starlette) -> None:
             app=admin_app,
             name=self.route_name,
         )
+        admin_app.router.redirect_slashes = redirect_slashes

starlette_admin/contrib/sqla/admin.py

@@ -57,7 +57,7 @@ def __init__(
         self.middlewares = [] if self.middlewares is None else list(self.middlewares)
         self.middlewares.insert(0, Middleware(DBSessionMiddleware, engine=engine))
 
-    def mount_to(self, app: Starlette) -> None:
+    def mount_to(self, app: Starlette, redirect_slashes: bool = True) -> None:
         try:
             """Automatically add route to serve sqlalchemy_file files"""
             __import__("sqlalchemy_file")
@@ -71,7 +71,7 @@ def mount_to(self, app: Starlette) -> None:
             )
         except ImportError:  # pragma: no cover
             pass
-        super().mount_to(app)
+        super().mount_to(app, redirect_slashes=redirect_slashes)
 
 
 def _serve_file(request: Request) -> Response: