Entered email override SecureRandom email? - ruby-on-rails

Question

Approach #1
Send email reminder to <%= email_field_tag :email, nil, placeholder: 'Enter Email', class: "send-email" %> # :email belongs to the users table
Approach #2
Send email reminder to <%= f.email_field :default_email, class: "send-email", placeholder: "Enter Email" %> # :default_email belongs to the challenges table. The point of this is to try something in the create process like current_user.email == #challenge.default_email
The user is then redirected to signup url
If a user signs up via Facebook a random email is generated so that he can get through the validation process: user.email = SecureRandom.hex + "#mailinator.com"
user.rb
def self.from_omniauth(auth)
# Sets 60 day auth token
oauth = Koala::Facebook::OAuth.new("125402372971231236229929", "ee917abf2e8f1c98274cdafssadffddffaebb1346f4")
new_access_info = oauth.exchange_access_token_info auth.credentials.token
new_access_token = new_access_info["access_token"]
new_access_expires_at = DateTime.now + new_access_info["expires"].to_i.seconds
where(provider: auth.provider, uid: auth.uid).first_or_initialize.tap do |user|
user.provider = auth.provider
user.image = auth.info.image
user.uid = auth.uid
user.name = auth.info.name
user.oauth_token = new_access_token # auth.credentials.token <- your old token. Not needed anymore.
user.oauth_expires_at = Time.at(auth.credentials.expires_at)
user.password = (0...8).map { (65 + rand(26)).chr }.join
user.email = SecureRandom.hex + "#mailinator.com" unless user.email.present?
user.activated = true
user.save!
end
end
But how can we make the email the user inputted in the challenges/create.html.erb form seen above override the SecureRandom email?
users_controller
def create
#user = User.new(user_params)
if #user.save
action = session.delete(:challenge_action)
deadline = session.delete(:challenge_deadline)
committed = session.delete(:challenge_committed)
date_started = session.delete(:challenge_date_started)
order = session.delete(:challenge_order)
days_challenged = session.delete(:challenge_days_challenged)
why = session.delete(:challenge_why)
conceal = session.delete(:challenge_conceal)
#user.challenges.create(action: action, deadline: deadline, why: why, conceal: conceal, date_started: date_started, committed: committed, days_challenged: days_challenged)
end
redirect_to root_url
else
render 'new'
end
end
challenges_controller
before_action :update_user_email, if: proc {|c| c.current_user.present? && c.params[:email].present? }
def create
#challenge = Challenge.new(challenge_params)
if params[:step] == '2'
if current_user == nil
# If there is no user, store values to the session.
session[:challenge_action] = challenge_params[:action]
session[:challenge_committed] = challenge_params[:committed]
session[:challenge_deadline] = [params["challenge"]["deadline(3i)"], params["challenge"]["deadline(2i)"], params["challenge"]["deadline(1i)"]].join('/')
session[:challenge_date_started] = [params["challenge"]["date_started(3i)"], params["challenge"]["date_started(2i)"], params["challenge"]["date_started(1i)"]].join('/')
session[:challenge_order] = challenge_params[:order]
session[:challenge_days_challenged] = challenge_params[:days_challenged]
session[:challenge_why] = challenge_params[:why]
session[:challenge_conceal] = challenge_params[:conceal]
redirect_to signup_path
else
#challenge = current_user.challenges.build(challenge_params)
#challenge.save
redirect_to root_path
end
else
respond_modal_with #challenge
end
end
private
def update_user_email
email = params[:email]
current_user.update_attribute(:email, email)
end
sessions_controller
class SessionsController < ApplicationController
def new
end
def facebook
user = User.from_omniauth(env["omniauth.auth"])
user.remember
cookies.permanent.signed[:user_id] = user.id
cookies.permanent[:remember_token] = user.remember_token
redirect_to root_url
end
def create
assign_email(cookies[:challenges_email])
user = User.find_by(email: params[:session][:email].downcase)
assign_email(cookies[:challenges_email])
if user && user.authenticate(params[:session][:password])
assign_email(cookies[:challenges_email])
log_in user
params[:session][:remember_me] == 'nil' ? forget(user) : remember(user)
redirect_to root_url
else
flash.now[:info] = 'Invalid email/password combination'
render 'new'
end
end
def destroy
log_out if logged_in?
redirect_to root_url
end
end

Answer 1

We talked about setting it as a cookie in another question. If you're taking that approach, you could pass the cookie to a method. Something like what is discussed in this question:
before_create :set_user_email
def assign_email(email)
#email = email
end
def set_user_email
self.email = #email
end
then in the controller action where you have access to the cookie:
assign_email(cookies[:challenge_email])

Answer 2

#joseph had answered it pretty simple but i think you can just get email in the field by setting it in the controller like;
User.new(:email => "email you want to show in the field")
no need to pass nil user object pass a new object.
And in the view file it will shown in email field with
Send email reminder to <%= f.email_field :email, class: "send-email", placeholder: "Enter Email" %>