Ruby strings with embedded variables

Question

How can I store ruby string with embedded variables in yaml, but insert variable values only when I get string from yaml?

what do you mean by string with embedded variables? Are you sure you want to insert variable *names* only ... — Ivaylo Strandjev, May 31 '12 at 14:04
I read the question as wanting to do something like "Text for Yaml #{variable}".to_yaml where the variable is not evaluated before it is sent to yaml. — vlasits, May 31 '12 at 14:12
**See also:** https://stackoverflow.com/questions/41620674/use-placeholders-in-yaml — dreftymac, Dec 30 '19 at 22:40

steenslag · Accepted Answer · 2012-05-31T14:22:06.010

19

str = "Hi %{name}, %{msg}. Bye %{name}." #yaml it, de-yaml it back to string
h = {:name=> "John", :msg=> "this message is for you"}
puts str % h
#=>Hi John, This message is for you. Bye John.

edited May 31 '12 at 14:22

answered May 31 '12 at 14:16

steenslag

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score 2 · Answer 2 · answered May 31 '12 at 14:25

Embed erb in yaml file as rails did:

# config/initializers/load_config.rb
APP_CONFIG = YAML.load_file("#{Rails.root}/config/app_config.yml")[Rails.env]


# config/app_config.yml
development:
  key1: <%= # ruby code ... %>
test:
  key1: <%= # ruby code ... %>
production:
  key1: <%= # ruby code ... %>

Ruby strings with embedded variables

2 Answers2