How to make a list of associative array in yaml

Question

I'm trying to store some configuration variables in yaml represented as an associative array aka dictionary. Here is how I did:

content_prices:                                                                                                                                                                                                                               
  - {country: AU, price: 6990000}                                                                                                                                                                                                             
  - {country: AT, price: 4990000}                                                                                                                                                                                                             
  - {country: BE, price: 4990000}

This produce an exception when I try to parse it from my ROR init files:

undefined method `symbolize_keys!' for nil:NilClass

Here is how I init it:

Config = YAML.load_file("#{Rails.root}/config/prices.yml")[Rails.env].symbolize_keys!

I guess my yaml syntax is wrong, then how to write it properly ?

I don't see sections for rails envs in your YAML – Sergio Tulentsev Jun 18 '13 at 16:12 — Sergio Tulentsev, Jun 18 '13 at 16:12

score 181 · Accepted Answer · answered Jun 18 '13 at 16:16

181

Your YAML looks okay, or you can configure an array of hashes like this :

content_prices:
  - country: AU
    price: 6990000
  - country: AT
    price: 4990000
  - country: BE
    price: 4990000

Which will load as the following hash:

{"content_prices"=>[
  {"country"=>"AU", "price"=>6990000}, 
  {"country"=>"AT", "price"=>4990000}, 
  {"country"=>"BE", "price"=>4990000}]}

But that still doesn't give you any reference to the Rails.env in the main hash. The problem seems to be what you're expecting to be in your hash rather than the format of the YAML.

answered Jun 18 '13 at 16:16

Shadwell

34,314
14
94
99

I guess, this is inline approach `key: - string1` , `key: ['string1', 'string2',` and this is contemporary object notation for associative where the above syntax is not accepted , ```- { param1: 'myvalue', param2: 'myvalue2' }``` https://stackoverflow.com/a/33136212/3419535 , https://stackoverflow.com/a/49814618/3419535 – FantomX1 Jun 03 '20 at 18:33

score 15 · Answer 2 · answered Jun 10 '15 at 14:43

15

Not on rails, but on Symfony2 php, I had to configure the yml file like this:

content_prices:
  - 
    country: AU
    price: 6990000
  - 
    country: AT
    price: 4990000
  - 
    country: BE
    price: 4990000

answered Jun 10 '15 at 14:43

sinhix

878
6
11

7

This is an issue with the symfony parser that does not respect the specification of lists unless there is a newline after the dash – dreftymac Jun 11 '15 at 01:13
@dreftymac is this issue fixed now? Could you give a link to the bug report? – marcv Sep 23 '16 at 07:57
@marcv if my memory serves me correctly it was fixed – dreftymac Sep 24 '16 at 17:20

score 0 · Answer 3 · answered Apr 17 '19 at 16:21

0

Just in case someone wants to use dynamic keys, it is also possible:

AppBundle\Service\MailerService:
    lazy: false
    arguments:
      $defaultFrom:
        '%mailer_user%': '%mailer_name%'

answered Apr 17 '19 at 16:21

GrumpyHat

281
2
15

How to make a list of associative array in yaml

3 Answers3