Could you give me a good doc for this?
So far I only read these:
http://thomasloven.com/blog/2018/08/YAML-For-Nonprogrammers/
http://blogs.perl.org/users/tinita/2019/05/reusing-data-with-yaml-anchors-aliases-and-merge-keys.html
There really isn’t a good single resource, just google yaml anchors and click through links.
But be warned, you need a firm understanding of yaml
To clarify further with your example. Your configuration is this:
entities: &entities
- entity: aaa
name: bbb
So yaml only sees this in the anchor *entities:
entity: aaa
name: bbb
if you were to merge them the way they are supposed to be merged, it would look like this:
entities:
- <<: *entities
entity: ccc
name: ddd
which WILL produce errors because this is not valid:
- entity: aaa
name: bbb
entity: ccc
name: ddd
But you are not doing that, you’re providing this as your configuration (which is valid)
entities:
- <<: *entities
- entity: ccc
name: ddd
Petro, thank you very much for explanations!
I found a way to add a new entity to the list (my original task):
type: vertical-stack
cards:
- &my_card
type: entities
title: Some title
state_color: true
entities: &ref_1
- entity: binary_sensor.updater
name: Updater-1
style: |
ha-card {
background: green;
}
- <<: *my_card
entities: &ref_2
- entity: binary_sensor.updater
name: Updater-2
- <<: *ref_1
- <<: *my_card
entities: &ref_3
- entity: binary_sensor.updater
name: Updater-3
- <<: *ref_2
- <<: *ref_1
- <<: *my_card
entities: &ref_4
- entity: binary_sensor.updater
name: Updater-4
- <<: *ref_3
- <<: *ref_2
- <<: *ref_1
Each new card inherits the card’s properties (like title, style) & entities.
But every new entity must be added to the top of the list - that is why the order is reverse (4,3,2,1).
I think this is more elegant:
type: vertical-stack
cards:
- &my_card
type: entities
title: Some title
state_color: true
entities:
- &ref_1
entity: binary_sensor.updater
name: Updater-1
style: |
ha-card {
background: green;
}
- <<: *my_card
entities:
- *ref_1
- &ref_2
entity: binary_sensor.updater
name: Updater-2
- <<: *my_card
entities:
- *ref_1
- *ref_2
- &ref_3
entity: binary_sensor.updater
name: Updater-3
- <<: *my_card
entities:
- *ref_1
- *ref_2
- *ref_3
- &ref_4
entity: binary_sensor.updater
name: Updater-4