Can you show the exact error when you use | default }}?
And maybe you can start over with one of the three parts that I see in your content, to not muddy the water too much?
Okay, I simplified it way down. Here is the card now:
- type: markdown
title: Updates Available
content: |
<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}
Here’s what the card currently looks like after HA finishes starting:
And here are the errors:
2021-04-11 14:20:21 ERROR (MainThread) [homeassistant.helpers.template] Template variable error: 'None' has no attribute 'attributes' when rendering '<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}'
2021-04-11 14:20:21 ERROR (MainThread) [homeassistant.helpers.template] Template variable error: 'None' has no attribute 'attributes' when rendering '<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}'
2021-04-11 14:20:22 ERROR (MainThread) [homeassistant.helpers.template] Template variable error: 'None' has no attribute 'attributes' when rendering '<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}'
I’d suggest adding an if-statement in another place, the error is caused by states.sensor.supervisor_updates.attributes.addons.
I’ve just added the 2 lines, you can add the correct formatting yourself.
- type: markdown
title: Updates Available
content: |
<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
if states('sensor.supervisor_updates') != None
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}
endif
Still not working. Card:
- type: markdown
title: Updates Available
content: |
<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
{% if states('sensor.supervisor_updates') != None %}
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}
{% endif %}
Errors:
2021-04-11 14:51:15 ERROR (MainThread) [homeassistant.helpers.template] Template variable error: 'None' has no attribute 'attributes' when rendering '<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}'
2021-04-11 14:51:15 ERROR (MainThread) [homeassistant.helpers.template] Template variable error: 'None' has no attribute 'attributes' when rendering '<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}'
2021-04-11 14:51:15 ERROR (MainThread) [homeassistant.helpers.template] Template variable error: 'None' has no attribute 'attributes' when rendering '<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}'
2021-04-11 14:51:15 ERROR (MainThread) [homeassistant.helpers.template] Template variable error: 'None' has no attribute 'attributes' when rendering '<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
{% if states('sensor.supervisor_updates') != None %}
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}
{% endif %}'
2021-04-11 14:51:16 ERROR (MainThread) [homeassistant.helpers.template] Template variable error: 'None' has no attribute 'attributes' when rendering '<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default(None) }}
{% if states('sensor.supervisor_updates') != None %}
> {% for addon in states.sensor.supervisor_updates.attributes.addons %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}
{% endif %}'
access the attributes safely
state_attr('sensor.supervisor_updates', 'addons')
1 Like
Thank you so much, Petro, that’s fixed it! I still don’t understand why the if statements didn’t work,
but I will just accept I’m above my pay grade here, and keep on learning 
For reference, if anyone comes across this and is interested, here’s my final working card that throws no errors on HA startup:
- type: markdown
title: Updates Available
card_mod:
style: |
:host {
--card-mod-icon-color: #42a5f5;
font-size: 1.1em;
}
content: |
<ha-icon icon="mdi:home-assistant"></ha-icon> Add-ons needing update: {{ states('sensor.supervisor_updates') | default }}
> {% for addon in state_attr('sensor.supervisor_updates', 'addons') %}
> {{ addon.name }} {{ addon.version }} -> {{ addon.version_latest }}
> {% endfor %}
<ha-icon icon="hacs:hacs"></ha-icon> HACS updates available: {{ states('sensor.hacs') | default }}
> {% for repo in state_attr('sensor.hacs', 'repositories') %}
> {{ repo.display_name }} {{ repo["installed_version"] }} -> {{ repo["available_version"] }}
> {% endfor %}
| | Current | | Latest |
|--- |:---: |:---: |:---: |
| **Supervisor** | {{ state_attr('sensor.supervisor_updates', 'current_version') }} | | {{ state_attr('sensor.supervisor_updates', 'newest_version') }} |
| **Audio** | {{ states.sensor.updater_audio.attributes.current_version }} | | {{ states.sensor.updater_audio.attributes.newest_version }} |
| **CLI** | {{ states.sensor.updater_cli.attributes.current_version }} | | {{ states.sensor.updater_cli.attributes.newest_version }} |
| **DNS** | {{ states.sensor.updater_dns.attributes.current_version }} | | {{ states.sensor.updater_dns.attributes.newest_version }} |
| **Multicast** | {{ states.sensor.updater_multicast.attributes.current_version }} | | {{ states.sensor.updater_multicast.attributes.newest_version }} |
| **Observer** | {{ states.sensor.updater_observer.attributes.current_version }} | | {{ states.sensor.updater_observer.attributes.newest_version }} |
which looks like this at the moment:
Edited to add: Sensors created with the help of this thread:
Update notifications! Core, HACS, Supervisor and Addons - Share your Projects! - Home Assistant Community (home-assistant.io)
Hello everyone. I receive a template sensor error with a markdown card
Here is my code located in the decluttering_templates.yaml card:
summary:
card:
type: markdown
card_mod:
style: |
ha-card {
background: none;
box-shadow: none;
font-family: Quicksand;
margin-bottom: -0.9em;
text-align: center
}
content: |
{{ states("sensor.date_fr") | default }}, nous fêtons les {{ states("sensor.nameday_fr") | default }}
{{ states.sensor.summary.attributes.text }}
And here is the error:
Template variable error: ‘None’ has no attribute ‘attributes’ when rendering ‘{{ states(“sensor.date_fr”) | default }}, nous fêtons les {{ states(“sensor.nameday_fr”) | default }} {{ states.sensor.summary.attributes.text }}’
I hope someone can help me solve it.
Thanks.
Just from the message, it would seem sensor.summary does not exist
I am now getting the following errors in the logs after the October update:
Template variable error: 'None' has no attribute 'attributes' when rendering '<ha-icon icon="mdi:home-assistant"></ha-icon> **Add-ons needing update:** {{ states.sensor.supervisor_updates.state }} > {% for addon in states.sensor.supervisor_updates.attributes.addons %} > {{ addon.name }} {{ addon.installed }} -> {{ addon.version }} > {% endfor %} <ha-icon icon="hacs:hacs"></ha-icon> **HACS updates available:** {{ states.sensor.hacs.state }} > {% for repo in states.sensor.hacs.attributes.repositories %} > **{{ repo.display_name }}** _{{ repo["installed_version"] }}_ -> _{{ repo["available_version"] }}_ > {% endfor %} --- | | Current | Latest | |--- |:---: |:---: | | **Supervisor** | {{ states.sensor.supervisor_updates.attributes.current_version }} | {{ states.sensor.supervisor_updates.attributes.newest_version }} |'
Because you’re not using state_attr, you’re using the long form for getting attributes. That’s prone to issues when the entities don’t exist
I see your answer above state_attr(‘sensor.supervisor_updates’, ‘addons’) but I am confused with the braces and bracket placement.
I have {% for addon in states.sensor.supervisor_updates.attributes.addons %}
does this change to {% for addon in state_attr(‘sensor.supervisor_updates’, ‘addons’) %}
?
All you have to understand is that you should replace all instances of
states.abc.xyz.attributes.ijk
with
state_attr('abc.xyz', 'ijk')
Thank you. I’m getting there!
What does   mean?
Non breaking space
That’s html not templating
Lots of different codes allowed in markdown cards. A lot to learn.
Got most of my warning (thanks to yours and 123’s help).errors cleared up.
Another one I see sometimes:
Logger: homeassistant.helpers.template
Source: helpers/template.py:1612
First occurred: 6:45:03 AM (32 occurrences)
Last logged: 6:45:03 AM
Template variable warning: 'dict object' has no attribute 'installed' when rendering '<ha-icon icon="mdi:home-assistant"></ha-icon> **Add-ons needing update:** {{ states.sensor.supervisor_updates.state }} > {% for addon in states.sensor.supervisor_updates.attributes.addons %} > {{ addon.name }} {{ addon.installed }} -> {{ addon.version }} > {% endfor %} <ha-icon icon="hacs:hacs"></ha-icon> **HACS updates available:** {{ states.sensor.hacs.state }} > {% for repo in states.sensor.hacs.attributes.repositories %} > **{{ repo.display_name }}** _{{ repo["installed_version"] }}_ -> _{{ repo["available_version"] }}_ > {% endfor %} --- | | Current | Latest | |--- |:---: |:---: | | **Supervisor** | {{ states.sensor.supervisor_updates.attributes.current_version }} | {{ states.sensor.supervisor_updates.attributes.newest_version }} |'
From a marked down card.
When I run the same code that you posted, mine shows Add-ons needing update: 16 this is all of the items, then it lists them all. Does this seem like my template is wrong or my markdown is wrong?
It seems like you either didn’t copy the markdown correctly, or your sensor is wrong. Do you have any addons needing an update (and which ones) if you look at the Supervisor dashboard? If you look in Developer Tools → States, what is the value of sensor.supervisor_updates (including attributes)? Mine is currently 0 so there is nothing listed under the attribute addons:
Markdown card:
My sensor is defined as
platform: command_line
name: Supervisor updates
command: 'curl http://supervisor/supervisor/info -H "Authorization: Bearer $(printenv SUPERVISOR_TOKEN)" | jq ''{"newest_version":.data.version_latest,"current_version":.data.version,"update_available":.data.update_available,"addons":[.data.addons[] | select(.update_available)]}'''
value_template: "{{ value_json.addons | length }}"
unit_of_measurement: pending update(s)
json_attributes:
- update_available
- newest_version
- current_version
- addons
Hope that helps…
I was missing the update_available line. Not sure how I missed it. Thanks.
1 Like
All of the top works great.
Anything after supervisor on the bottom fails.
Must be another template issue. Do you mind sharing yours?
| **Supervisor** | {{ state_attr('sensor.supervisor_updates', 'current_version') }} | | {{ state_attr('sensor.supervisor_updates', 'newest_version') }} |
Anything below cause the card to show just updates available.
| **Audio** | {{ states.sensor.updater_audio.attributes.current_version }} | | {{ states.sensor.updater_audio.attributes.newest_version }} |
| **CLI** | {{ states.sensor.updater_cli.attributes.current_version }} | | {{ states.sensor.updater_cli.attributes.newest_version }} |
| **DNS** | {{ states.sensor.updater_dns.attributes.current_version }} | | {{ states.sensor.updater_dns.attributes.newest_version }} |
| **Multicast** | {{ states.sensor.updater_multicast.attributes.current_version }} | | {{ states.sensor.updater_multicast.attributes.newest_version }} |
| **Observer** | {{ states.sensor.updater_observer.attributes.current_version }} | | {{ states.sensor.updater_observer.attributes.newest_version }} |