Devise: Create users without password

Question

In our application we have normal users. However, we want to be able to make invitations, to invite certain people. Note that an invitation is directly coupled to a user, as

Answer 1

TL;DR:

user.define_singleton_method(:password_required?) { false }

Fiddle:

class MockDeviseUser
  protected
  def password_required?
    true
  end
end

class User < MockDeviseUser
  def is_password_required?
    puts password_required?
  end
end

unrequired_password_user = User.new
unrequired_password_user.define_singleton_method(:password_required?) { false }
unrequired_password_user.is_password_required?
regular_user = User.new
regular_user.is_password_required?
#false
#true