map deep merge does not work

[叶萌]

my yaml content

.default: &default
  mysql: &mysql_default
    db_host: mysql.avatar2.test
    db_port: 3306
    db_user: &mysql_default_user default
    db_password: &mysql_default_password secret
  redis: &redis_default
    cluster:
      node:
        - host: rediscluster.avatar2.test
          port: 7000
        - host: rediscluster.avatar2.test
          port: 7001
        - host: rediscluster.avatar2.test
          port: 7002
        - host: rediscluster.avatar2.test
          port: 7003
        - host: rediscluster.avatar2.test
          port: 7004
        - host: rediscluster.avatar2.test
          port: 7005

system:
  erp:
    <<: *default
    mysql:
      db_name: erp

actual result

system:
  erp:
    mysql:
      db_name: erp

expect result

‌

system:
  erp:
    mysql:
      db_name: erp
      db_host: mysql.avatar2.test
      db_port: 3306
      db_user: &mysql_default_user default
      db_password: &mysql_default_password secret

‌

deep merge does not work

[Andrey Somov]

The provided YAML document is invalid, it fails to parse. Can you please provide the complete document ?

[叶萌]

‌

.default: &default
  mysql: &mysql_default
    db_host: mysql.avatar2.test
    db_port: 3306
    db_user: &mysql_default_user default
    db_password: &mysql_default_password secret
  redis: &redis_default
    cluster:
      node:
        - host: rediscluster.avatar2.test
          port: 7000
        - host: rediscluster.avatar2.test
          port: 7001
        - host: rediscluster.avatar2.test
          port: 7002
        - host: rediscluster.avatar2.test
          port: 7003
        - host: rediscluster.avatar2.test
          port: 7004
        - host: rediscluster.avatar2.test
          port: 7005

system:
  erp:
    <<: *default
    mysql:
      db_name: erp

strange, I didn’t find any problems

I delete the chinese characters, please try again

[Andrey Somov]

Give the YAML to any on-line editor. Chinese is no problem. The problem is missing &mysql_default_password

[叶萌]

I will provide a demo repo hosted on github, wait for a while

[叶萌]

here, https://github.com/jk2K/snakeyamldemo, please try

[Andrey Somov]

1. The project (snakeyamldemo) does NOT output anything related to YAML. It is not heplful
2. Please create a pull request for THIS project with a test. It would be helpful

‌

[叶萌]

you need to debug,

I will try to create a pull request

[叶萌]

I have created a pull request for this project with a test, https://bitbucket.org/asomov/snakeyaml/pull-requests/3

[Andrey Somov]

I see the issue now.

According to the spec (https://yaml.org/type/merge.html): Specify one or more mappings to be merged with the current one.

You need to specify merging separately for every mapping.

[Andrey Somov]

I changed the test to show how it works. Please check the source.