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Fix support for base topic for empty values in MQTT discovery msg (#19501)

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* Fix topic expansion for short strings

* Lint
This commit is contained in:
emontnemery 2018-12-24 14:21:58 +01:00 committed by Fabian Affolter
parent 4a1da0b041
commit edb7ec78f9
1 changed files with 1 additions and 1 deletions
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2
homeassistant/components/mqtt/discovery.py
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@ -196,7 +196,7 @@ async def async_start(hass: HomeAssistantType, discovery_topic, hass_config,
if TOPIC_BASE in payload:
base = payload[TOPIC_BASE]
for key, value in payload.items():
if isinstance(value, str):
if isinstance(value, str) and value:
if value[0] == TOPIC_BASE and key.endswith('_topic'):
payload[key] = "{}{}".format(base, value[1:])
if value[-1] == TOPIC_BASE and key.endswith('_topic'):