Syntax error for permission.rb - ruby-on-rails

I am not able to solve this syntax error I have on permission.rb. It says it needs a extra "end" but when I do add it Safari is unable to load the page. I have tried several different methods on both files, none seem to work. Any ideas?
Error:
SyntaxError in UsersController#new
/Users/lexi87/dating/app/controllers/application_controller.rb:20: syntax error, unexpected keyword_end, expecting end-of-input
Rails.root: /Users/lexi87/dating
Application Trace | Framework Trace | Full Trace
app/controllers/users_controller.rb:1:in `<top (required)>'
permission.rb (without the extra 'end'):
class Permission < Struct.new(:user)
def allow?(controller, action)
if user.nil?
controller == "galleries" && action.in?(%w[index show])
elsif user.admin?
true
else
controller == "galleries" && action != "destroy"
end
end
application_controller:
class ApplicationController < ActionController::Base
protect_from_forgery
private
def current_user
#current_user ||= User.find(session[:user_id]) if session[:user_id]
end
helper_method :current_user
def current_permission
#current_permission || ::Permission.new(current_user)
end
end
def authorize
if !current_permission.allow?(params[:controller], params[:action])
redirect_to root_url, alert: "Not authorized."
end
end
end
UPDATE
Here's my users_controller:
class UsersController < ApplicationController
before_filter :authorize
def new
#user = User.new
end
def profile
#profile = User.profile
end
def create
#user = User.new(params[:user])
if #user.save
UserMailer.registration_confirmation(#user).deliver
session[:user_id] = #user.id
redirect_to root_url, notice: "Thank you for signing up!"
else
render "new"
end
end
def show
#user = User.find(params[:id])
end
def edit
#user = User.find(params[:id])
end
def index
#users = User.all
end
def destroy
User.find(params[:id]).destroy
flash[:success] = "User deleted."
redirect_to users_url
end
def update
#user = User.find(params[:id])
if #user.update_attributes(params[:user])
flash[:success] = "Account updated"
redirect_to #user
authorize! :update, #user
else
render 'edit'
end
end
end

It looks like you need another end in permission.rb and you need to move one in application_controller.rb:
class ApplicationController < ActionController::Base
protect_from_forgery
private
def current_user
#current_user ||= User.find(session[:user_id]) if session[:user_id]
end
helper_method :current_user
def current_permission
#current_permission || ::Permission.new(current_user)
end
end # this shouldn't be here
def authorize
if !current_permission.allow?(params[:controller], params[:action])
redirect_to root_url, alert: "Not authorized."
end
end
# it should be here

corrections
1.
You definetely need the end at the end of the permission.rb
2.
you do not need and end to end the private section of ApplicationController. Everything below the private keyword is considered 'private'. So you need to move the "authorize" method.
solution
So the complete code is (with moving one method into "public"):
permission.rb:
class Permission < Struct.new(:user)
def allow?(controller, action)
if user.nil?
controller == "galleries" && action.in?(%w[index show])
elsif user.admin?
true
else
controller == "galleries" && action != "destroy"
end
end
end
application_controller:
class ApplicationController < ActionController::Base
protect_from_forgery
def authorize
if !current_permission.allow?(params[:controller], params[:action])
redirect_to root_url, alert: "Not authorized."
end
end
private
def current_user
#current_user ||= User.find(session[:user_id]) if session[:user_id]
end
helper_method :current_user
def current_permission
#current_permission || ::Permission.new(current_user)
end
end

You don't have to close the private keyword.
The end after
def current_permission
is not necessary !

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App not creating sessions and #current_user not working

I have some code here that is supposed to create a session upon login, and create "#current_user". However, neither of these things are working, and after 2 days of speculating, I can't figure out why.
Users controller:
class UsersController < ApplicationController
def new
#user = User.new
end
def create
#user = User.new(user_params)
if #user.save
redirect_to login_path
flash[:success] = "Account created. You may now log in"
else
redirect_to '/signup'
flash[:warning] = "Something went wrong. Try again."
end
end
private
def user_params
params.require(:user).permit(:username, :jabber_id, :password)
end
end
Sessions controller:
class SessionsController < ApplicationController
def new
end
def create
#user = User.find_by_username(params[:session][:name])
if #user && #user.authenticate(params[:session][:password])
session[:user_id] = #user.id
redirect_to '/posts'
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session[:session_id] = nil
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end
end
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class ApplicationController < ActionController::Base
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end
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Hello guys so what i want to do is simple.
I want a before filter to check if the current user is admin, to automatically redirect him to the admin panel even if the admin accesses the index page(e.g localhost:3000 which is the root url for normal users)
for the admin users the path is localhost:3000/admin/
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private
def admin_users?
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here is users controller
class UsersController < ApplicationController
before_filter :admin_users? # application controller method
before_action :logged_in_user, only: [:index,:edit,:update] # is in Application Controller
before_action :correct_user, only: [:edit,:update]
before_action :admin_user, only: :destroy
def index
#users = User.paginate(page: params[:page])
end
def show
#user = User.find(params[:id])
#microposts = #user.microposts.paginate(page: params[:page])
end
def new
#user = User.new
end
def create
#user = User.new(user_params)
if #user.save
#user.send_activation_email
flash[:info] = "Please check your email to activate your account."
redirect_to root_url
else
render 'new'
end
end
def update
#user = User.find(params[:id])
if #user.update_attributes(user_params)
flash[:success] = "Profile updated"
redirect_to #user
else
render 'edit'
end
end
def edit
#user = User.find(params[:id])
end
def destroy
User.find(params[:id]).destroy
flash[:success] = "User deleted"
redirect_to users_url
end
private
def user_params
params.require(:user).permit(:name,:email,:password,:password_confirmation)
end
# before filters
def correct_user
#user = User.find(params[:id])
redirect_to(root_url) unless current_user?(#user)
end
def admin_user
redirect_to(root_url) unless current_user.admin?
end
end
any clues?
The issue is next. You have put your redirect inside application_controller.rb, that all other controller inherit from, even Admin controller.
You have to do next:
remove before_filter :admin_user from your ApplicationController, and put it only where you want to check if user is admin, all controllers except admin controller.
You have redirect loop because admin controller will redirect to admin_path, when you come to admin_path.

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Error:
ERROR["test_layout_links", SiteLayoutTest, 0.888518]
test_layout_links#SiteLayoutTest (0.89s)
ActionView::Template::Error: ActionView::Template::Error: undefined local variable or method `current_user' for #<#<Class:0x007fcd97c44cf0>:0x007fcd97c4c4a0>
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app/views/layouts/_header.html.erb:8:in `_app_views_layouts__header_html_erb__1982327839123609485_70260496954760'
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test/integration/site_layout_test.rb:6:in `block in <class:SiteLayoutTest>'
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app/views/layouts/_header.html.erb:8:in `_app_views_layouts__header_html_erb__1982327839123609485_70260496954760'
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sessions_controller
class SessionsController < ApplicationController
def new
end
def create
user = User.find_by(email: params[:session][:email].downcase)
if user && user.authenticate(params[:session][:password])
log_in user
params[:session][:remember_me] == '1' ? remember(user) : forget(user)
redirect_back_or user
else
flash.now[:danger] = 'Invalid email/password combination' #Not quite right!
render 'new'
end
end
def destroy
log_out if logged_in?
redirect_to root_url
end
end
users_controller
class UsersController < ApplicationController
before_action :logged_in_user, only: [:edit, :update]
before_action :correct_user, only: [:edit, :update]
def show
#user = User.find(params[:id])
end
def new
#user = User.new
end
def create
#user = User.new(user_params)
if #user.save
log_in #user
flash[:success] = "Welcome to the Sample App!"
redirect_to #user
else
render 'new'
end
end
def edit
end
def update
if #user.update_attributes(user_params)
flash[:success] = "Profile updated"
redirect_to #user
else
render 'edit'
end
end
private
def user_params
params.require(:user).permit(:name, :email, :password,
:password_confirmation)
end
# Before filters
# Confirms a logged-in user.
def logged_in_user
unless logged_in?
store_location
flash[:danger] = "Please log in."
redirect_to login_url
end
end
# Confirms the correct user.
def correct_user
#user = User.find(params[:id])
redirect_to(root_url) unless current_user?(#user)
end
end
sessions_helper
module SessionsHelper
#logs in the given user.
def log_in(user)
session[:user_id] = user.id
end
#Remembers a user in a persistent session.
def remember(user)
user.remember
cookies.permanent.signed[:user_id] = user.id
cookies.permanent[:remember_token] = user.remember_token
end
#Returns the user corresponding to the remember token cookie.
def current_user?(user)
user == current_user
end
#returns true if the user is logged in, false otherwise.
def logged_in?
!current_user.nil?
end
#Forgets a persistent session.
def forget(user)
user.forget
cookies.delete(:user_id)
cookies.delete(:remember_token)
end
#logs out the current user.
def log_out
forget(current_user)
session.delete(:user_id)
#current_user = nil
end
# Redirects to stored location (or to the default).
def redirect_back_or(default)
redirect_to(session[:forwarding_url] || default)
session.delete(:forwarding_url)
end
# Stores the URL trying to be accessed.
def store_location
session[:forwarding_url] = request.url if request.get?
end
end
sessions_helper_test
require 'test_helper'
class SessionsHelperTest < ActionView::TestCase
def setup
#user = users(:michael)
remember(#user)
end
test "current_user returns right user when session is nil" do
assert_equal #user, current_user
assert is_logged_in?
end
test "current_user returns nil when remember digest is wrong" do
#user.update_attribute(:remember_digest, User.digest(User.new_token))
assert_nil current_user
end
end
I think you may be missing the current_user method. It's defined here.
Though the name is similar, current_user is a completely different method to current_user?. The question mark is a convention that typically means the method will return either true or false.
You're missing a current_user method in your sessions_helper.rb. Check back in Chapter 8.57

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def logged_in?
#current_user ||= User.find(session[:user_id])
end
Sessions Controller
class SessionsController < ApplicationController
def new
end
def create
user = User.find_by(email: params[:email])
if user && user.authenticate(params[:password])
session[:user_id] = user.id
flash[:success] = "You are logged in"
redirect_to root_path
else
render action: 'new'
flash[:error] = "There was a problem logging in. Please check your email and password"
end
end
end
def index
#users = User.all
end
def show
end
def new
#user = User.new
end
def edit
end
def create
#user = User.new(user_params)
if #user.save
session[:user_id] = #user.id
flash[:notice] = "You have registered, please login"
redirect_to login_path
else
render :new
end
end
def update
respond_to do |format|
if #user.update(user_params)
format.html { redirect_to #user, notice: 'User was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: #user.errors, status: :unprocessable_entity }
end
end
end
def destroy
#user.destroy
respond_to do |format|
format.html { redirect_to users_url }
format.json { head :no_content }
end
end
private
def set_user
#user = User.find(params[:id])
end
def user_params
params.require(:user).permit(:first_name, :last_name, :email, :password, :password_confirmation)
end
end
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class ArticlesController < ApplicationController
http_basic_authenticate_with name: "dhh", password: "secret", except: [:index, :show]
def new
#article = Article.new
end
def index
#article = Article.all
end
def create
#article = Article.new(article_params)
if #article.save
redirect_to #article
else
render 'new'
end
end
def edit
#article = Article.find(params[:id])
end
def update
#article = Article.find(params[:id])
if #article.update(article_params)
redirect_to #article
else
render 'edit'
end
end
def show
#article = Article.find(params[:id])
end
def destroy
#article = Article.find(params[:id])
#article.destroy
redirect_to articles_path
end
private
def article_params
params.require(:article).permit(:title, :text, :image)
end
end
Application Helper
module ApplicationHelper
def logged_in?
#current_user ||= User.find(session[:user_id])
end
end
The problem you're facing is that session[:user_id] is nil. Usually a method which sets current user is called current_user. The logged_in? is not a good name for a method setting an user instance, because one would expect that a method ending with a question mark would return a true or false. And not an user instance.
Also, setting the current user is usually done with a before_filter. Additionally, you want to skip such before filter for action where you're setting the current user (i.e the current_user doesn't exist yet)
Finally, I would rather fail gracefully, if user is not found. You can achieve this by changing your code to User.find_by_id(session[:user_id])
While the user is not loggued, session[:user_id] is nil, and so User.find(session[:user_id]) generates the error. The method should be like this:
def logged_in?
#current_user ||= User.find(session[:user_id]) if session[:user_id].present?
end
Why would the logged_in? helper method try to assign a value to #current_user? I think that is a bad logic, it should just return a boolean result without modifying such a central instance. This is a proper way to do that:
def logged_in?
#current_user.nil? ? false : true
end
The responsibility of setting the #current_user falls to a method that you should place in application_controller.rb and make it a before_action so that it's executed before any controller action is triggered, that is:
# app/controllers/applicaton_controller.rb
class ApplicationController < ActionController::Base
protect_from_forgery
before_action :authenticate_user
# Your actions here
..
..
#
private
def authenticate_user
#current_user ||= User.find(session[:user_id]) if session[:user_id].present?
end
end

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def c(value, t_array)
t_array.min{|a,b| (value-a).abs <=> (value-b).abs }
end
def show
peeps = User.find(:all, :conditions => ["id != ?", current_user.id])
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user_a.push user.rating
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current_user is working in the view just fine however returns nil in the controller.
Here is my SessionsHelper.
module SessionsHelper
def sign_in(user)
cookies.permanent[:remember_token] = user.remember_token
self.current_user = user
end
def current_user=(user)
#current_user = user
end
def current_user
#current_user ||= User.find_by_remember_token(cookies[:remember_token])
end
def signed_in?
!current_user.nil?
end
end
The SessionsHelper is included by ApplicationController
class ApplicationController < ActionController::Base
protect_from_forgery
include SessionsHelper
end
Here is my SessionsController
class SessionsController < ApplicationController
def new
end
def create
user = User.find_by_email(params[:email])
if user && user.authenticate(params[:password])
sign_in user
redirect_to root_url, notice: "Logged in!"
else
flash.now.alert = "Email or password is invalid"
render "new"
end
end
def destroy
cookies[:remember_token] = nil
redirect_to root_url, notice: "Logged out!"
end
end
put your code in application controller and mark it as helper_method in this way you can use that method in both helper as well as controller
helper_method :current_user
def current_user=(user)
#current_user = user
end
I think helpers are only available to the view. Try putting this near the top of your controller:
include SessionsHelper

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