Why is there not a way to set a config option that applies to all environments?

[AlvesJorge]

Instead of

development:
  options:
    raise_not_found_error: false
    
staging:
  options:
    raise_not_found_error: false
    
production:
  options:
    raise_not_found_error: false

we could write:

default:
  options:
    raise_not_found_error: false

It's such an obvious feature that it must have been thought about at some point, I'm wondering why it was never integrated.

[jamis]

Hey, good question. The general practice in the Rails ecosystem is to use YAML anchors and aliases for this sort of thing. Here's an example:

---
defaults:
  options: &default-options
    raise_not_found_error: false

development:
  clients:
    default:
      uri: <%= ENV['MONGODB_URI'] %>
  options: *default-options

production:
  clients:
    default:
      uri: <%= ENV['PRODUCTION_MONGODB_URI'] %>
  options:
    <<: *default-options
    log_level: :info

In the example above, the development options uses the default options directly (options: *default-options). The production options extend the default options (<<: *default-options, followed by additional options).

The general syntax here uses an ampersand followed by an identifier to "name" a hash. Then, you reference that named hash with an asterisk followed by that identifier.

named_hash: &some-identifier
  a: 1
  b: 2
  c: 3

copied_hash: *some-identifier

extended_hash:
  <<: *some-identifier
  b: 3
  d: 5

I hope that helps.

[AlvesJorge]

That definitely looks like the right way to do it as of now :) Thanks @jamis