uninitialized constant Faker::Date Updating to rails 5.1

Question

I had a working application when I tried to update from rails 5.0 to 5.1. (I've been updating from 4.2 to 5.0)

It doesn't work it anymore, running commands like:

rails server

yields an error. I don't know how to fix this, and I coudn't find any information, it's weird because it points to the faker's code, not to mine.

This is the console output

/home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:94:in rescue in block (2 levels) in require': There was an error while trying to load the gem 'faker'. (Bundler::GemRequireError) Gem Load Error is: uninitialized constant Faker::Date Backtrace for gem load error is: /home/gaston/.rvm/gems/ruby-2.3.1/gems/faker-1.8.1/lib/faker/time.rb:2:in ' /home/gaston/.rvm/gems/ruby-2.3.1/gems/faker-1.8.1/lib/faker/time.rb:1:in <top (required)>' /home/gaston/.rvm/gems/ruby-2.3.1/gems/faker-1.8.1/lib/faker.rb:214:in block in ' /home/gaston/.rvm/gems/ruby-2.3.1/gems/faker-1.8.1/lib/faker.rb:214:in each' /home/gaston/.rvm/gems/ruby-2.3.1/gems/faker-1.8.1/lib/faker.rb:214:in ' /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:91:in require' /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:91:in block (2 levels) in require' /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in each' /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in block in require' /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in each' /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in require' /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler.rb:106:in require' /home/gaston/Workspace/cloud9workspace/projects/time/config/application.rb:7:in ' /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/commands/server/server_command.rb:128:in require' /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/commands/server/server_command.rb:128:in block in perform' /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/commands/server/server_command.rb:125:in tap' /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/commands/server/server_command.rb:125:in perform' /home/gaston/.rvm/gems/ruby-2.3.1/gems/thor-0.19.4/lib/thor/command.rb:27:in run' /home/gaston/.rvm/gems/ruby-2.3.1/gems/thor-0.19.4/lib/thor/invocation.rb:126:in invoke_command' /home/gaston/.rvm/gems/ruby-2.3.1/gems/thor-0.19.4/lib/thor.rb:369:in dispatch' /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/command/base.rb:63:in perform' /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/command.rb:44:in invoke' /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/commands.rb:16:in ' /home/gaston/Workspace/cloud9workspace/projects/time/bin/rails:9:in require' /home/gaston/Workspace/cloud9workspace/projects/time/bin/rails:9:in ' /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in load' /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in call' /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/client/command.rb:7:in call' /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/client.rb:30:in run' /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/bin/spring:49:in <top (required)>' /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/binstub.rb:31:in load' /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/binstub.rb:31:in <top (required)>' /home/gaston/Workspace/cloud9workspace/projects/time/bin/spring:13:in require' /home/gaston/Workspace/cloud9workspace/projects/time/bin/spring:13:in <top (required)>' bin/rails:3:inload' bin/rails:3:in <main>' Bundler Error Backtrace: from /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:90:in block (2 levels) in require' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in each' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in block in require' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in each' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in require' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/bundler-1.13.7/lib/bundler.rb:106:in require' from /home/gaston/Workspace/cloud9workspace/projects/time/config/application.rb:7:in ' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/commands/server/server_command.rb:128:in require' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/commands/server/server_command.rb:128:in block in perform' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/commands/server/server_command.rb:125:in tap' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/commands/server/server_command.rb:125:in perform' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/thor-0.19.4/lib/thor/command.rb:27:in run' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/thor-0.19.4/lib/thor/invocation.rb:126:in invoke_command' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/thor-0.19.4/lib/thor.rb:369:in dispatch' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/command/base.rb:63:in perform' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/command.rb:44:in invoke' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/railties-5.1.0/lib/rails/commands.rb:16:in ' from /home/gaston/Workspace/cloud9workspace/projects/time/bin/rails:9:in require' from /home/gaston/Workspace/cloud9workspace/projects/time/bin/rails:9:in ' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in load' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in call' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/client/command.rb:7:in call' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/client.rb:30:in run' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/bin/spring:49:in <top (required)>' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/binstub.rb:31:in load' from /home/gaston/.rvm/gems/ruby-2.3.1/gems/spring-2.0.2/lib/spring/binstub.rb:31:in <top (required)>' from /home/gaston/Workspace/cloud9workspace/projects/time/bin/spring:13:in require' from /home/gaston/Workspace/cloud9workspace/projects/time/bin/spring:13:in <top (required)>' from bin/rails:3:inload' from bin/rails:3:in `'

This are my files: spring.rb

#!/usr/bin/env ruby

# This file loads spring without using Bundler, in order to be fast.
# It gets overwritten when you run the `spring binstub` command.

unless defined?(Spring)
  require 'rubygems'
  require 'bundler'

  if (match = Bundler.default_lockfile.read.match(/^GEM$.*?^    (?:  )*spring \((.*?)\)$.*?^$/m))
    Gem.paths = { 'GEM_PATH' => [Bundler.bundle_path.to_s, *Gem.path].uniq.join(Gem.path_separator) }
    gem 'spring', match[1]
    require 'spring/binstub'
  end
end

Faker was already included in the gemfile, I've updated to the last version. gemfile

gem 'faker', '~> 1.8', '>= 1.8.1'

this is my application.rb, (the first 7 lines) application.rb

require File.expand_path('../boot', __FILE__)

require 'rails/all'

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

Answer 1

There was a problem while updating. I've done the process from scratch and now it works. It had nothing to do with faker.