Use multiple selector for validation in AI task (home-assistant#158056)

Author: balloob

homeassistant/components/ai_task/__init__.py

@@ -101,8 +101,8 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
                     vol.Schema({str: STRUCTURE_FIELD_SCHEMA}),
                     _validate_structure_fields,
                 ),
-                vol.Optional(ATTR_ATTACHMENTS): vol.All(
-                    cv.ensure_list, [selector.MediaSelector({"accept": ["*/*"]})]
+                vol.Optional(ATTR_ATTACHMENTS): selector.MediaSelector(
+                    {"accept": ["*/*"], "multiple": True}
                 ),
             }
         ),
@@ -118,8 +118,8 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
                 vol.Required(ATTR_TASK_NAME): cv.string,
                 vol.Optional(ATTR_ENTITY_ID): cv.entity_id,
                 vol.Required(ATTR_INSTRUCTIONS): cv.string,
-                vol.Optional(ATTR_ATTACHMENTS): vol.All(
-                    cv.ensure_list, [selector.MediaSelector({"accept": ["*/*"]})]
+                vol.Optional(ATTR_ATTACHMENTS): selector.MediaSelector(
+                    {"accept": ["*/*"], "multiple": True}
                 ),
             }
         ),