Hi, i always have a template error at startup, the problem is in the first try, the sensor.some_sensor doesnt have a value yet, only after x amount of seconds therefore the value template doesnt work “yet”, in next 5 seconds the error is gone
how can i fix this for my template sensor,so that makes my logbook nicer
- platform: template
sensors:
callstatus:
value_template: "{{ (state_attr('sensor.some_sensor', 'data')|from_json).callStatus }}"
error:
2021-05-03 14:55:52 ERROR (MainThread) [homeassistant.helpers.event] Error while processing template: Template("{{ (state_attr('sensor.some_sensor', 'data')|from_json).callStatus }}")
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 390, in async_render
render_result = _render_with_context(self.template, compiled, **kwargs)
File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 1360, in _render_with_context
return template.render(**kwargs)
File "/usr/local/lib/python3.8/site-packages/jinja2/environment.py", line 1090, in render
self.environment.handle_exception()
File "/usr/local/lib/python3.8/site-packages/jinja2/environment.py", line 832, in handle_exception
reraise(*rewrite_traceback_stack(source=source))
File "/usr/local/lib/python3.8/site-packages/jinja2/_compat.py", line 28, in reraise
raise value.with_traceback(tb)
File "<template>", line 1, in top-level template code
File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 1312, in from_json
return json.loads(value)
File "/usr/local/lib/python3.8/json/__init__.py", line 341, in loads
raise TypeError(f'the JSON object must be str, bytes or bytearray, '
TypeError: the JSON object must be str, bytes or bytearray, not NoneType
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 506, in async_render_to_info
render_info._result = self.async_render(variables, strict=strict, **kwargs)
File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 392, in async_render
raise TemplateError(err) from err
homeassistant.exceptions.TemplateError: TypeError: the JSON object must be str, bytes or bytearray, not NoneType