separate DECORATED_PAGES per reflex app (#3102)

reflex/app.py

@@ -726,7 +726,7 @@ class App(Base):
         This can move back into `compile_` when py39 support is dropped.
         """
         # Add the @rx.page decorated pages to collect on_load events.
-        for render, kwargs in DECORATED_PAGES:
+        for render, kwargs in DECORATED_PAGES[get_config().app_name]:
             self.add_page(render, **kwargs)
 
     def compile_(self, export: bool = False):

reflex/page.py

@@ -2,9 +2,12 @@
 
 from __future__ import annotations
 
-from typing import Any
+from collections import defaultdict
+from typing import Any, Dict, List
 
-DECORATED_PAGES = []
+from reflex.config import get_config
+
+DECORATED_PAGES: Dict[str, List] = defaultdict(list)
 
 
 def page(
@@ -55,7 +58,7 @@ def page(
         if on_load:
             kwargs["on_load"] = on_load
 
-        DECORATED_PAGES.append((render_fn, kwargs))
+        DECORATED_PAGES[get_config().app_name].append((render_fn, kwargs))
 
         return render_fn
 
@@ -69,6 +72,6 @@ def get_decorated_pages() -> list[dict]:
         The decorated pages.
     """
     return sorted(
-        [page_data for render_fn, page_data in DECORATED_PAGES],
+        [page_data for _, page_data in DECORATED_PAGES[get_config().app_name]],
         key=lambda x: x["route"],
     )

reflex/testing.py

@@ -240,13 +240,15 @@ class AppHarness:
             # ensure config and app are reloaded when testing different app
             reflex.config.get_config(reload=True)
             # Save decorated pages before importing the test app module
-            before_decorated_pages = reflex.app.DECORATED_PAGES.copy()
+            before_decorated_pages = reflex.app.DECORATED_PAGES[self.app_name].copy()
             # Ensure the AppHarness test does not skip State assignment due to running via pytest
             os.environ.pop(reflex.constants.PYTEST_CURRENT_TEST, None)
             self.app_module = reflex.utils.prerequisites.get_compiled_app(reload=True)
             # Save the pages that were added during testing
             self._decorated_pages = [
-                p for p in reflex.app.DECORATED_PAGES if p not in before_decorated_pages
+                p
+                for p in reflex.app.DECORATED_PAGES[self.app_name]
+                if p not in before_decorated_pages
             ]
         self.app_instance = self.app_module.app
         if isinstance(self.app_instance._state_manager, StateManagerRedis):
@@ -411,7 +413,7 @@ class AppHarness:
 
         # Cleanup decorated pages added during testing
         for page in self._decorated_pages:
-            reflex.app.DECORATED_PAGES.remove(page)
+            reflex.app.DECORATED_PAGES[self.app_name].remove(page)
 
     def __exit__(self, *excinfo) -> None:
         """Contextmanager protocol for `stop()`.