Iterate trough yaml file in ruby and fetching the required data - ruby-on-rails

Question

I have a yaml file with the following struture:
market:
US:
- prod:
- page1: sys-admin, client-admin, editor-admin
- page2: client-admin
- page3: editor-admin, sys-admin
- dev:
- page1: sys-admin, editor-admin
- page2: sys-admin, client-admin, editor-admin
- page3: sys-admin, client-admin, editor-admin
IN:
- prod:
- page1: sys-admin, client-admin
- page2: client-admin, editor-admin
- page3: editor-admin, sys-admin
- dev:
- page1: client-admin, editor-admin
- page2: sys-admin, client-admin, editor-admin
- page3: sys-admin, client-admin, editor-admin
Now I want a function which returns market name eg. IN and page eg. page1 based on the roles eg. client-admin. How should I proceed? I am trying but not able to conclude and come to a proper output.
Help me out, Guys !
Thanks in advance. :)

Answer 1

I would suggest re thinking the design of your YAML file to make this easier on yourself. Maybe something along the lines of
doc = <<Y
market:
US:
prod:
page1:
- sys-admin
- client-admin
- editor-admin
page2:
- client-admin
page3:
- editor-admin
- sys-admin
Y
Then finding the correct pages is easy:
locale = 'US'
environment = 'prod'
user_role = 'client-admin'
h = YAML.load(doc).to_h
h['market'][locale][environment].select do |page,roles|
roles.include?(user_role)
end
#=> {"page1"=>["sys-admin", "client-admin", "editor-admin"],
# "page2"=>["client-admin"]}
Right now your environments are an Array of Hash objects which seems unnecessary as they could just be a Hash and your roles are actually a String (e.g. "sys-admin, client-admin, editor-admin") which could be come more difficult to maintain in the future and makes parsing a bit more cumbersome.