Conditional check in yaml file to show the proper content

Question

How can I check if / else in yaml file.

like:

 if %{attribute}
    attributes:
       shipping_comment: Shipping comment / Instructions
 else
    attributes:
       shipping_date: Date

Answer 1

YAML is a data serialisation language, so it's not meant to contain if/else style executable statements: that's the responsibility of the programming language you're using.

A simple example in Ruby to determine which config string from a YAML file to output could be defining your YAML config file as follows:

data.yml

attributes:
  shipping_comment: Shipping comment / Instructions
  shipping_date: Date

Then, in your program, read the file in and run the conditional there:

shipping.rb

#!/usr/bin/env ruby
require 'yaml'
config = YAML.load_file('data.yml')

attribute = true # your attribute to check here

if attribute
  puts config['attributes']['shipping_comment']
else
  puts config['attributes']['shipping_date']
end