Error while processing template renders=2

Configuration
1

Hi,

Recently I’m getting multiple errors on diferentes templates while processing the template. Below you can find the log:

> Logger: homeassistant.helpers.event
> Source: helpers/template.py:645
> First occurred: 2:04:12 AM (4 occurrences)
> Last logged: 2:04:12 AM
> 
> Error while processing template: Template<template=({% set T1 = states.climate.termostato_salon.attributes.temperature | float %} {% if T1|is_number %} {{ (T1 ) | round(1) }} {% else %} {{ this.state }} {% endif %}) renders=2>
> Traceback (most recent call last):
>   File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 643, in async_render
>     render_result = _render_with_context(self.template, compiled, **kwargs)
>   File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 2756, in _render_with_context
>     return template.render(**kwargs)
>            ~~~~~~~~~~~~~~~^^^^^^^^^^
>   File "/usr/local/lib/python3.13/site-packages/jinja2/environment.py", line 1295, in render
>     self.environment.handle_exception()
>     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
>   File "/usr/local/lib/python3.13/site-packages/jinja2/environment.py", line 942, in handle_exception
>     raise rewrite_traceback_stack(source=source)
>   File "<template>", line 1, in top-level template code
>   File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 2375, in forgiving_float_filter
>     return float(value)
> jinja2.exceptions.UndefinedError: 'homeassistant.util.read_only_dict.ReadOnlyDict object' has no attribute 'temperature'
> 
> 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 760, in async_render_to_info
>     render_info._result = self.async_render(  # noqa: SLF001
>                           ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
>         variables, strict=strict, log_fn=log_fn, **kwargs
>         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>     )
>     ^
>   File "/usr/src/homeassistant/homeassistant/helpers/template.py", line 645, in async_render
>     raise TemplateError(err) from err
> homeassistant.exceptions.TemplateError: UndefinedError: 'homeassistant.util.read_only_dict.ReadOnlyDict object' has no attribute 'temperature'

And this is my template sensor:

{% set T1 = states.climate.termostato_salon.attributes.temperature | float %}

{% if T1|is_number %}
  {{ (T1 )  | round(1) }}
{% else %}       
  {{ this.state }}
{% endif %}

Is there any thing wrong with the template? It’s working perfectly most of the time.

2

Yes.

https://www.home-assistant.io/docs/configuration/templating/#states

Screenshot 2025-02-21 at 18-09-51 Templating - Home Assistant
Screenshot 2025-02-21 at 18-09-51 Templating - Home Assistant843×195 8 KB

Also the temperature attribute does not need to be converted from a string to a number with the float filter. It is already a number (or unknown). Only states are always strings. Attributes can be other object types, like numbers.

{% set T1 = state_attr('climate.termostato_salon','temperature') %}

{% if T1|is_number %}
  {{ (T1 )  | round(1) }}
{% else %}       
  {{ this.state }}
{% endif %}