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Handle race condition on startup.

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This commit is contained in:
pavoni 2016-01-22 11:30:04 +00:00
parent b1f7b5c6d7
commit 87a9fd8252
1 changed files with 4 additions and 1 deletions
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5
homeassistant/components/sensor/template.py
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@ -77,7 +77,10 @@ class SensorTemplate(Entity):
def _update_callback(_event): def _update_callback(_event):
""" Called when the target device changes state. """ """ Called when the target device changes state. """
self.update_ha_state(True) # This can be called before the entity is properly
# initialised, so check before updating state,
if self.entity_id:
self.update_ha_state(True)
self.hass.bus.listen(EVENT_STATE_CHANGED, _update_callback) self.hass.bus.listen(EVENT_STATE_CHANGED, _update_callback)