Rails uninitialized constant Bundler (NameError)

Question

I\'m getting the following error when running any rails commands like rails s or rails c, it\'s also preventing my heroku app from starting (same e

Answer 1

I have problems like you, subscribe my case.

config/applicataion.rb:

require_relative 'boot'

require 'rails/all'

# Require the gems listed in Gemfile, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(*Rails.groups)

module AppName
  class Application < Rails::Application
    config.load_defaults 5.2
  end
end

where require_relative 'boot' is very important, such as config/boot.rb:

ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)

require 'bundler/setup' # Set up gems listed in the Gemfile.

has including bundler library into application.