Template error in Template Editor while it works fine as custom template sensor

The problem

I hope this is the right place to report this.

I use this code in a template sensor which works fine in that template sensor. However, when I use this code in the Developer Tools->Template Editor I get an error.

The code is: {% set sensors = states.sensor | selectattr(‘attributes.device_class’, ‘==’, ‘battery’) | selectattr(‘attributes.state_class’, ‘==’, ‘measurement’) | rejectattr(‘state’, ‘in’, [‘unavailable’, ‘unknown’]) | list %}

The error is: UndefinedError: ‘homeassistant.util.read_only_dict.ReadOnlyDict object’ has no attribute ‘device_class’

What version of Home Assistant Core has the issue?

Core 2022.5.0

What was the last working version of Home Assistant Core?

core-2022.4.6

What type of installation are you running?

Home Assistant Supervised

Integration causing the issue

No response

Link to integration documentation on our website

No response

Diagnostics information

No response

Example YAML snippet

{% set sensors = states.sensor 
  | selectattr('attributes.device_class', '==', 'battery') 
  | selectattr('attributes.state_class', '==', 'measurement') 
  | rejectattr('state', 'in', ['unavailable', 'unknown'])
  | list %}

Anything in the logs that might be useful for us?

No response

Additional information

No response

[smarthomejunkie]

This can be solved by first checking if the attributes are defined for the entity.

For instance:

{% set sensors = states.sensor 
  | selectattr('attributes.device_class', 'defined') 
  | selectattr('attributes.state_class', 'defined') 
  | selectattr('attributes.device_class', '==', 'battery') 
  | selectattr('attributes.state_class', '==', 'measurement') 
  | rejectattr('state', 'in', ['unavailable', 'unknown'])
  | list %}

Now you won’t get this error anymore

[elkarto]

This can be solved by first checking if the attributes are defined for the entity.

For instance:

{% set sensors = states.sensor 
  | selectattr('attributes.device_class', 'defined') 
  | selectattr('attributes.state_class', 'defined') 
  | selectattr('attributes.device_class', '==', 'battery') 
  | selectattr('attributes.state_class', '==', 'measurement') 
  | rejectattr('state', 'in', ['unavailable', 'unknown'])
  | list %}

Now you won’t get this error anymore

Well, it seems much better to do that, and it works!!

However, the behaviour in the template editor and in the custom template sensor should be the same.