Am I stupid ? get value out of map by 8d

Configuration
1

aloha,
I really feel stupid but I do not find any meaningful documentation how to work with lists / maps:

  • have a simple name,value map (tv channels)
  • eg

channels:

  • name: channel1
    id: 22
  • name: channels
    id:55
    …
  • so I think I put the definition of this list close in the according HA script
  • then it will need to handle the incoming channel name as parameter
  • and use this parameter as lookup criteria against the list
  • coming from Java devolpment background I expected that as basic …
  • but being quite new in HA, yaml world it is somehow tough

any advice ?
thänx in advance

2

You don’t give an example of where you want to use this so this answer will be very generic:

     value_template: >
       {% set mapper =  { 22 : 'channel1', 55 : 'channels' } %}
       {% set x = states('sensor.id')|int(0) %}
       {{ mapper[x] if x in mapper else 'Failed' }}

EDIT: there was some talk of input_select helpers supporting values and names but nothing has come of it yet.

3

to expand on toms comment

script assuming you’re using play_media…

change_channel:
  fields:
    channel:
  variables:
    channels:
      22: channel1
      53: channels
    selected: >
      {{ channels.get(channel) }}
  sequence:

  # check for valid channel, if not, stop script.
  - condition: template
    value_template: "{{ selected is not none }}"

  # we got valid channel, now change to it.
  - service: media_player.play_media
    target:
      entity_id: media_player.whatever_yours_is
    data:
      ... (other data here)...
      media_content_id: "{{ selected }}"

Then to call it where the automation waits for the service to execute…

- service: script.change_channel
  data:
    channel: 22

or call it without waiting

- service: script.turn_on
  target:
    entity_id: script.change_channel
  data:
    variables:
      channel: 22
1 Like
4

thaaanx for the quick response - will try this as soon I am back in vienna …

  • so if I have the map as defined in our examples (‘channels’) - I can simply call channel.get(key) to get the associated value

cool

5

so,
back and tried a test code in a script as follows…

alias: tvboxByChannel
fields:
channel:
selector:
text: null
name: channel
variables:
channels: >-
orf1:11 orf2:12 orf3:22 3sat:48 arte:47 atv:13 servustv:15 puls4:14 ard:23
zdf:16 pro7:17 sat1:21 rtl:18 vox:20 w24:19 okto:53 kuriert:51 laendletv:131
comedycentral:44 syfy:205 tele5:46 automotorsport:110 puls4xx:27 oe24:28
ntv:29 phoenix:56 zdfinfo:57 doku:38 n24doku:39 spiegelgeschichte:219 one:43
zdfneo:42 orfv:127 kabel1:24 alpha:59 br:49 wdr:61 mdr:62 swr:63 ndr:64
hr:65 srfinfo:67 nitro:33 7max:36 rtl2:25 sixx:34 dmax:37 atv2:36 krone:30
rtlup:35

sequence:

  • service: notify.persistent_notification
    data:
    message: hallo {{channel}} looking up id => {{channels.get(channel)}}

…

i get following error on running the script

UndefinedError: ‘homeassistant.util.yaml.objects.NodeStrClass object’ has no attribute ‘get’

what is going on here ? hmm …

6

Based on the error message, Home Assistant thinks the channel variable contains a string. It implies you didn’t successfully define its value as a dictionary. (You used a line continuation character >- to indicate the start of a template yet that’s not needed because it’s not a template)

It’s difficult to tell what you have created because your example is unformatted. Compare the appearance of your example to petro’s (which is formatted correctly). Here’s a guide for formatting YAML:

7

I can’t tell because your code isn’t formatted.

8

ok … will try and learn (coming from a more strongly typed coding world - this is quite a different planet here where every single space makes a difference :slight_smile:
but thänx for pointing me to a direction … will try and feedback
c

9

each key value pair should be on a separate line at the same indentation, like I have in my example. I believe you put them all in 1 line