Creating belongs_to and has_many routes, controllers, and views? - ruby-on-rails

Question

I'm creating a project that allows users to sign in and refer other users once they are signed in. The users have_many referrals and the referrals belongs_to users. I would like to have a page that, once a current user signs in, they can input a referral with the params: name, and referral_email. But this is a collaborative project, and the person who set up the user authentication used devise. Currently, I'm getting the following error:
undefined method `resource' for #<ReferralsController:0x007fb75735aa00>
User Controller:
class UsersController < ApplicationController
def new
end
end
Referral Controller:
class ReferralsController < ApplicationController
def new
#referral = Referral.new
end
def create
#referral = current_user.referrals.new(referral_params)
if #referral.save
redirect_to #referral
else
render 'new'
end
end
def show
#referrals = current_user.find_by_user_id(params[:user_id]).referrals.all
end
def index
#referrals = current_user.referrals.all
end
def edit
#referral = Referral.find(params[:id])
end
def update
#referral = Referral.find(params[:id])
if #referral.update(referral_params)
redirect_to #referral
else
render 'edit'
end
end
def destroy
#referral = Referral.find(params[:id])
#referral.destroy
redirect_to referral_path
end
private
def referral_params
params.require(:referral).permit(:name, :email, :user_id)
end
end
User Model:
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
has_many :referrals
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
include RoleModel
# attr_accessible :email, :password, :password_confirmation, :school_name, :sport, :roles, :roles_mask
roles_attribute :roles_mask
roles :admin, :coach, :guest
end
Referral Model
class Referral < ActiveRecord::Base
belongs_to :user
end
User view:
<h2>Sign up</h2>
<%= form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
<%= devise_error_messages! %>
<div><%= f.label :email %><br />
<%= f.email_field :email, autofocus: true %></div>
<div><%= f.label :school_name %><br />
<%= f.text_field :school_name %></div>
<div><%= f.label :sport %><br />
<%= f.text_field :sport %></div>
<div><%= f.label :password %><br />
<%= f.password_field :password, autocomplete: "off" %></div>
<div><%= f.label :password_confirmation %><br />
<%= f.password_field :password_confirmation, autocomplete: "off" %></div>
<div><%= f.submit "Sign up" %></div>
<% end %>
<%= render "devise/shared/links" %>
Referral view:
<h2>Refer a coach </h2>
<%= form_for ([current_user, #referral]), :html => { :mulitpart => true } do |f| %>
<%= devise_error_messages! %>
<div><%= f.label :referral %><br />
<%= f.text_field :referral %></div>
<div><%= f.label :referral_email %><br />
<%= f.email_field :referral, autofocus: true %></div>
<div><%= f.submit "Refer This Coach" %></div>
<% end %>
Routes:
Blog::Application.routes.draw do
devise_for :users
resources :users do
resources :referrals
end
get 'sessions/new'
get 'users/new'
resources :articles do
resources :comments
end
root 'welcome#index'
end

Answer 1

The problem is coming from the devise_error_messages! in your referrals view - remove it. Only the user resource is set up to work with devise, nothing else.
As stated in the comments, you should reconsider having referrals be a nested resource under users - there isn't really any advantage to do so the way you are using it, and lots of room for error. Keep it simple!