From f07aac39dedba5be0a6bfdb536331d7cce988e1a Mon Sep 17 00:00:00 2001
From: Erik Montnemery <erik@montnemery.com>
Date: Fri, 11 Sep 2026 12:14:50 +0200
Subject: [PATCH] Adjust lg_netcast to not access DeviceEntry.config_entries
 (#181726)

---
 .../components/lg_netcast/device_trigger.py   | 20 +++++++++---------
 .../lg_netcast/test_device_trigger.py         | 21 +++++++++++++++++++
 2 files changed, 31 insertions(+), 10 deletions(-)

diff --git a/homeassistant/components/lg_netcast/device_trigger.py b/homeassistant/components/lg_netcast/device_trigger.py
index 647f097f57ad..a24568caedc7 100644
--- a/homeassistant/components/lg_netcast/device_trigger.py
+++ b/homeassistant/components/lg_netcast/device_trigger.py
@@ -8,15 +8,16 @@ from homeassistant.components.device_automation import (
     DEVICE_TRIGGER_BASE_SCHEMA,
     InvalidDeviceAutomationConfig,
 )
+from homeassistant.config_entries import ConfigEntryState
 from homeassistant.const import CONF_DEVICE_ID, CONF_PLATFORM, CONF_TYPE
 from homeassistant.core import CALLBACK_TYPE, HomeAssistant
 from homeassistant.exceptions import HomeAssistantError
+from homeassistant.helpers import device_registry as dr
 from homeassistant.helpers.trigger import TriggerActionType, TriggerInfo
 from homeassistant.helpers.typing import ConfigType
 
 from . import trigger
 from .const import DOMAIN
-from .helpers import async_get_device_entry_by_device_id
 from .triggers.turn_on import (
     PLATFORM_TYPE as TURN_ON_PLATFORM_TYPE,
     async_get_turn_on_trigger,
@@ -40,15 +41,14 @@ async def async_validate_trigger_config(
     if config[CONF_TYPE] == TURN_ON_PLATFORM_TYPE:
         device_id = config[CONF_DEVICE_ID]
 
-        try:
-            device = async_get_device_entry_by_device_id(hass, device_id)
-        except ValueError as err:
-            raise InvalidDeviceAutomationConfig(err) from err
-
-        if not any(
-            entry.entry_id in device.config_entries
-            for entry in hass.config_entries.async_loaded_entries(DOMAIN)
-        ):
+        device, config_entry = dr.async_get_device_and_config_entry_for_domain(
+            hass, device_id, domain=DOMAIN
+        )
+        if device is None:
+            raise InvalidDeviceAutomationConfig(
+                f"Device {device_id} is not a valid {DOMAIN} device."
+            )
+        if config_entry is None or config_entry.state is not ConfigEntryState.LOADED:
             raise InvalidDeviceAutomationConfig(
                 f"Device {device.id} is not from an existing {DOMAIN} config entry"
             )
diff --git a/tests/components/lg_netcast/test_device_trigger.py b/tests/components/lg_netcast/test_device_trigger.py
index e9fe4b97e793..6ad1eb1f652e 100644
--- a/tests/components/lg_netcast/test_device_trigger.py
+++ b/tests/components/lg_netcast/test_device_trigger.py
@@ -161,4 +161,25 @@ async def test_failure_scenarios(
     with pytest.raises(InvalidDeviceAutomationConfig):
         await device_trigger.async_validate_trigger_config(hass, config)
 
+    not_loaded_entry = MockConfigEntry(
+        domain=DOMAIN, data={}, unique_id="not-loaded-unique-id"
+    )
+    not_loaded_entry.add_to_hass(hass)
+
+    not_loaded_device = device_registry.async_get_or_create(
+        config_entry_id=not_loaded_entry.entry_id,
+        identifiers={(DOMAIN, "not-loaded-unique-id")},
+    )
+
+    not_loaded_config = {
+        "platform": "device",
+        "domain": DOMAIN,
+        "device_id": not_loaded_device.id,
+        "type": "lg_netcast.turn_on",
+    }
+
+    # Test that a device from a not-loaded lg_netcast config entry raises exception
+    with pytest.raises(InvalidDeviceAutomationConfig, match="is not from an existing"):
+        await device_trigger.async_validate_trigger_config(hass, not_loaded_config)
+
     # Test that only valid triggers are attached