Template to turn_off multiple media_players

HI,

somehow it seems impossible to turn_off multiple media_players at once by means of a template.

using:

          {{ states.media_player|selectattr('entity_id','in',state_attr('group.radio_players','entity_id'))
            |selectattr('state','eq','playing') |map(attribute='entity_id')|join(', ') }}

gives a comma separated list of currently playing media_players.

using the script:

      stop_radio:
        alias: Stop radio
        sequence:
          - service: media_player.turn_off
            data_template:
              entity_id:
                - >
                  {{states('sensor.radio_players_playing')}}

does not work and errors out with:

Error executing service <ServiceCall script.stop_radio (c:058568383cb043d594eab8deccd6659b)>
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/homeassistant/core.py", line 1130, in _safe_execute
    await self._execute_service(handler, service_call)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/core.py", line 1143, in _execute_service
    await handler.func(service_call)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/components/script.py", line 123, in service_handler
    context=service.context)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/components/script.py", line 181, in async_turn_on
    kwargs.get(ATTR_VARIABLES), context)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/helpers/script.py", line 130, in async_run
    await self._handle_action(action, variables, context)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/helpers/script.py", line 172, in _handle_action
    action, variables, context)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/helpers/script.py", line 261, in _async_call_service
    context=context
  File "/usr/local/lib/python3.6/site-packages/homeassistant/helpers/service.py", line 81, in async_call_from_config
    domain, service_name, service_data, blocking=blocking, context=context)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/core.py", line 1101, in async_call
    processed_data = handler.schema(service_data)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 267, in __call__
    return self._compiled([], data)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 589, in validate_dict
    return base_validate(path, iteritems(data), out)
  File "/usr/local/lib/python3.6/site-packages/voluptuous/schema_builder.py", line 427, in validate_mapping
    raise er.MultipleInvalid(errors)
voluptuous.error.MultipleInvalid: Entity ID media_player.googlehome_hall, media_player.googlehome_woonkamer is an invalid entity id for dictionary value @ data['entity_id']

while entering the same list in the dev-service:

47

works just fine.

other services, like volume or media_source selection work fine with multiple entity_ids…

what could be wrong, or have I stumbled on a bug…

Update

well that was easy and silly.

changed the service to:

      - service: media_player.turn_off
        data_template:
          entity_id: >
             {{states('sensor.radio_players_playing')}}

working now.

solved my own issue here, leave it for reference