switch method

homeassistant/components/api/__init__.py

@@ -351,7 +351,9 @@ class APIComponentsView(HomeAssistantView):
         return self.json(request.app["hass"].config.components)
 
 
-_cached_template = lru_cache(template.Template)
+# Hold a reference to the cached template string to prevent it from being
+# garbage collected so the template compile cache can be used.
+_cached_template_str = lru_cache(str)
 
 
 class APITemplateView(HomeAssistantView):
@@ -366,8 +368,9 @@ class APITemplateView(HomeAssistantView):
             raise Unauthorized()
         try:
             data = await request.json()
-            tpl = _cached_template(data["template"])
-            tpl.hass = request.app["hass"]
+            tpl = template.Template(
+                _cached_template_str(data["template"]), request.app["hass"]
+            )
             return tpl.async_render(variables=data.get("variables"), parse_result=False)
         except (ValueError, TemplateError) as ex:
             return self.json_message(

homeassistant/components/mobile_app/webhook.py

@@ -365,7 +365,9 @@ async def webhook_stream_camera(
     return webhook_response(resp, registration=config_entry.data)
 
 
-_cached_template = lru_cache(template.Template)
+# Hold a reference to the cached template string to prevent it from being
+# garbage collected so the template compile cache can be used.
+_cached_template_str = lru_cache(str)
 
 
 @WEBHOOK_COMMANDS.register("render_template")
@@ -384,8 +386,7 @@ async def webhook_render_template(
     resp = {}
     for key, item in data.items():
         try:
-            tpl = _cached_template(item[ATTR_TEMPLATE])
-            tpl.hass = hass
+            tpl = template.Template(_cached_template_str(item[ATTR_TEMPLATE]), hass)
             resp[key] = tpl.async_render(item.get(ATTR_TEMPLATE_VARIABLES))
         except TemplateError as ex:
             resp[key] = {"error": str(ex)}

homeassistant/components/websocket_api/commands.py

@@ -425,7 +425,9 @@ def handle_ping(
     connection.send_message(pong_message(msg["id"]))
 
 
-_cached_template = lru_cache(template.Template)
+# Hold a reference to the cached template string to prevent it from being
+# garbage collected so the template compile cache can be used.
+_cached_template_str = lru_cache(str)
 
 
 @decorators.websocket_command(
@@ -444,8 +446,7 @@ async def handle_render_template(
 ) -> None:
     """Handle render_template command."""
     template_str = msg["template"]
-    template_obj = _cached_template(template_str)
-    template_obj.hass = hass
+    template_obj = template.Template(_cached_template_str(template_str), hass)
     variables = msg.get("variables")
     timeout = msg.get("timeout")
     info = None