MONGOID-5042 rails g mongoid:config is not working on Rails 6.1

[awesome]

# lib/rails/generators/mongoid/config/config_generator.rb
module Mongoid
  module Generators
    class ConfigGenerator < Rails::Generators::Base

      def app_name
        #
        # 1A)
        # https://api.rubyonrails.org/classes/Rails/Generators/NamedBase.html#method-i-application_name
        #require 'rails/generators/actions'
        #require 'rails/generators/named_base'
        #Rails::Generators::NamedBase.new([""]).send(:application_name)
        #
        # --OR--
        #
        # 1B)
        #Rails.application.class.name.split("::").first.underscore
        # 
        # 2)
        # https://api.rubyonrails.org/classes/Module.html#method-i-module_parent_name
        Rails.application.class.module_parent_name.underscore
      end

Ticket: https://jira.mongodb.org/browse/MONGOID-5042
Alternative PR: #4941

[awesome]

Do you want PRs submitted to master? I branched from 7.2-stable…

[p-mongo]

Hi @awesome , thank you for the PR.

In order for this or the other PR to be merged we need appropriate test coverage. I expect the app-tests mechanism (https://github.com/mongodb/mongoid/blob/master/spec/integration/app_spec.rb) can be extended to create a new application and run the generator in it. If you'd like to tackle that please feel free, otherwise it's on my list to do as soon as time permits.

[p-mongo]

The PR ultimately will need to be against master, yes.

[awesome]

@p-mongo thanks for the replies. Going to write tests and submit via #4953