Instructions to wrap initializer in development check

[bpurinton]

I noticed that for our Rails projects which all have this line in the bin/setup script:

bundle exec rake db:create RAILS_ENV=test

setup fails with this error when the config/initializers/dev_toolbar.rb is not wrapped in a development environment check:

== Creating test database ==
rake aborted!
NameError: uninitialized constant DevToolbar (NameError)

DevToolbar.configure do |config|
^^^^^^^^^^
/Users/ben/Desktop/firstdraft-github/orgs/appdev-projects/phase1/rails-rps/config/initializers/dev_toolbar.rb:1:in `<main>'
/Users/ben/Desktop/firstdraft-github/orgs/appdev-projects/phase1/rails-rps/config/environment.rb:5:in `<main>'
<internal:/Users/ben/.rbenv/versions/3.2.1/lib/ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:37:in `require'
<internal:/Users/ben/.rbenv/versions/3.2.1/lib/ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:37:in `require'
/Users/ben/.rbenv/versions/3.2.1/bin/bundle:25:in `load'
/Users/ben/.rbenv/versions/3.2.1/bin/bundle:25:in `<main>'
Tasks: TOP => db:create => db:load_config => environment
(See full trace by running task with --trace)

== Command ["bundle exec rake db:create RAILS_ENV=test"] failed ==

That surprised me given this code in the gem:

https://github.com/firstdraft/dev_toolbar/blob/4acbc33a0dcdb57985af51ca9a4cd58b23fc491e/lib/dev_toolbar/middleware.rb#L10

---

Perhaps there is a better solution than just updating the README to point out this requirement, however, on #8, there is already planned work to create a generator for the initializer. During that work, we can investigate this more deeply, but for now, since we need this working ASAP for class, I think we just need this instruction in the README and to have all the initializers use this slight hack.

Since all initializers will be uniform across our Rails projects and managed with the project-syncing tool, it will be easy to fix this later on across the projects that are using the dev_toolbar gem.

---

[!IMPORTANT] Wraps DevToolbar.configure in a development check to prevent test database creation errors, updating README.md accordingly.

• Behavior:
  • Wraps DevToolbar.configure in config/initializers/dev_toolbar.rb with if Rails.env.development? to prevent errors during test database creation.
• Documentation:
  • Updates README.md to include the development environment check in the configuration example.

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