This article will discuss how to bypass password and password confirmation in the registration process and send a password through email when a user registers themselves.
First, create a new project.
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rails new password_mailer
rails db:create db:migrate
Add devise gem to your project from this guide.
Now, add application-wide authentication.
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# app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
before_action :authenticate_user!
end
Generate a welcome controller.
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rails g controller Welcome index
Configure routes.
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# config/routes.rb
root to: 'welcome#index'
Generate a Mailer.
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rails g mailer UserMailer send_password
Put the following code in app/mailers/user_mailer.rb:
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class UserMailer < ApplicationMailer
def send_password(user, password)
@greeting = 'Hi'
@password = password
mail to: user.email
end
end
In app/views/user_mailer/send_password.html.erb, put the following code:
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# app/views/user_mailer/send_password.html.erb
<p>
<%= @greeting %>, your password is <%= @password %>
</p>
Next, add a callback method that will run after the successful creation of a user.
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# app/models/user.rb
after_create :send_password
def password_required?
return false if new_record?
super
end
def send_password
pass = SecureRandom.hex(6)
update(password: pass)
UserMailer.send_password(self, pass).deliver_now
end
Now run the following command:
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rails g devise:views
Remove password-related fields from app/views/devise/registrations/new.html.erb, then run.
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rails s
Now the mailer should work properly.