JINJA template assistance needed -

Configuration
1

Hi, been trying to wrap my head around fetching the latest version from docker hub registry, consider the following snippet:

{% set value_json = [{"layer": "", "name": "latest"}, {"layer": "", "name": "0.100.0.dev20190921"}, {"layer": "", "name": "0.100.0.dev20190922"}, {"layer": "", "name": "0.100.0.dev20190924"}, {"layer": "", "name": "0.100.0.dev20190925"}, {"layer": "", "name": "0.100.0.dev20190926"}, {"layer": "", "name": "0.100.0.dev20190927"}, {"layer": "", "name": "0.100.0.dev20191001"}, {"layer": "", "name": "0.100.0.dev20191002"}, {"layer": "", "name": "0.100.0.dev20191003"}, {"layer": "", "name": "0.100.0b0"}, {"layer": "", "name": "0.100.0b1"}, {"layer": "", "name": "0.100.0b2"}, {"layer": "", "name": "0.100.0b3"}, {"layer": "", "name": "0.100.1"}, {"layer": "", "name": "0.100.2"}, {"layer": "", "name": "0.100.3"}, {"layer": "", "name": "0.101.0"}, {"layer": "", "name": "0.101.0.dev20191004"}, {"layer": "", "name": "0.101.0.dev20191005"}, {"layer": "", "name": "0.101.0.dev20191006"}, {"layer": "", "name": "0.101.0.dev20191008"}, {"layer": "", "name": "0.101.0.dev20191011"}, {"layer": "", "name": 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"name": "stable"}] %}
{% set version_floats = [] %}
{% set highest_known_ver = {"highest_ver": 0.0} %}
{% for image_build in value_json | sort(attribute='name') if image_build.name.split(".")[0]=="0" %}
  {% set split_ver = image_build.name.split(".") %}
    {% if split_ver|length == 3 %}
      {% if split_ver[2] | int != ""%}
        {% set ver_str = split_ver[1]+"."+split_ver[2] %}
        {% set ver_float = (ver_str | float) %}
          {% if ver_float > highest_known_ver["highest_ver"] %}
            {% set _ = highest_known_ver.update({'highest_ver': ver_float}) %}
            ver_float={{ver_float}}--highest_known_ver={{highest_known_ver["highest_ver"]}}
          {% endif %}
      {% endif %}
    {% endif %}
    {% if loop.last %}
      {{ highest_known_ver["highest_ver"] }}
    {% endif %}
{% endfor %}

For the above code I receive Error rendering template: SecurityError: access to attribute 'update' of 'dict' object is unsafe. where in fact this is a valid jinja template.

Any suggestions on how to solve this ?

For the above JSON the expected template value would be 0.106.6

Thanks

2

what a template… 8()

well… this is not Jinja, is it?

highest_known_ver.update({'highest_ver': ver_float})

it’s more likely Python. the thing is not every Python construction is allowed in Jinja templates within HA (as well as in python_script, for example).
so it looks like you need to find another way without using update.

3

You’re probably right but even when just trying to assign a global variable and overriding it with a new value it fails to do so.

In fact, what I’d like to do is find the maximum value in an array of floats, maybe this would give a better idea of what I’m trying to achieve here…

4

I don’t quite understand that - could you post an example?

would max filter do?

5

Sadly it won’t, in the first post in this thread, I’ve posted the value_json from which I’d like to find the latest home-assistant stable version published to docker registry hub.

Since HASS version conforms to 0.xx.yy I’m trying to parse xx.yy into a float and then comparing each version in the JSON against the highest found so far.

The thing is saving the value to a variable using a set action doesn’t do what I would think it should do and the values get overwritten on every iteration of the for loop.

6

you need to make it clear as it’s not an array of floats.

what part of your code are you talking about?

by the way, did you see this - Scoping Behaviour?