i've some problem with the skip_before action:
class ApplicationController < ActionController::Base
protect_from_forgery with: :exception
before_action :require_login
before_action :inc_cookies
def inc_cookies
if cookies[:token] != nil
#name = cookies[:name]
#surname = cookies[:surname]
#user_roomate = cookies[:roomate]
end
end
def require_login
if cookies[:token] == nil
puts "No token"
redirect_to '/'
end
end
end
and my other controller:
class UsersController < ApplicationController
skip_before_action :require_login, :except => [:landing, :connect, :create]
end
I don't know why, but when I'm on the root (the :landing action from UsersController), Rails try to pass in the require_login...
I've misundertood something with this filter, or do I something wrong?
Thanks for any help!
This sounds normal to me - you've asked rails to skip your before action, except if the action is :landing, :connect or :create whereas it sounds as though you want the opposite. If you want those 3 actions not to execute the require_login then you should be doing
skip_before_action :require_login, :only => [:landing, :connect, :create]
Related
I have this in my application_controller
class ApplicationController < ActionController::Base
before_action :login_required, :only => 'users/login'
protect_from_forgery with: :exception
protected
def login_required
return true if User.find_by_id(session[:user_id])
access_denied
return false
end
def access_denied
flash[:error] = 'Oops. You need to login before you can view that page.'
redirect_to users_login_path
end
end
I want to use the login_required for each controller def method
Is there a better way instead of this?
class UsersController < ApplicationController
before_action :set_user, :login_required, :only => 'users/login'
#before_action only: [:show, :edit, :update, :destroy, :new]
def index
login_required
#users = User.all
end
def new
login_required
#user = User.new
end
end
Is there a better way to include login_required for all controllers methods since before_action doesn't seem to work?
I don't know the motivation of your logic, so I'll just focus on how you can solve this particular problem.
You can do something like this:
In your application controller:
class ApplicationController < ActionController::Base
before_action :login_required
private
def login_required
current_params = params["controller"] + "/" + params["action"]
if current_params == "users/new" or current_params == "users/index"
return true if User.find(session[:user_id])
access_denied
return false
end
end
def access_denied
flash[:error] = 'Oops. You need to login before you can view that page.'
redirect_to users_login_path
end
end
The login_required method will just run only on users controller's index and new action, for the rest, it'll just ignore. Also you can just use User.find() and no need to use User.find_by_id()
Now, in your users_controller.rb, you don't need to mention anything about login_required, everything will happen already in application_controller before coming here.
class UsersController < ApplicationController
before_action :set_user, :only => 'users/login'
#before_action only: [:show, :edit, :update, :destroy, :new]
def index
#users = User.all
end
def new
#user = User.new
end
end
Firstly, I'm going to suggest that you use devise for authentication, it's a lot more secure and should deal with this for you.
As for your problem, you should be able to specify the before_action like this:
before_action :set_user, :login_required, only: [:new]
Which you can put in your UserController. However if you want this globally, just put it in the ApplicationController, without the only: key.
If you want to require login for all pages except /users/login, then you almost have it right except you are specifying only: when you should be using except::
class ApplicationController < ActionController::Base
before_action :login_required, except: 'users/login'
...
end
This configuration will be applied to all sub-classes of ApplicationController as well.
I'm using Pundit to authorize actions in my controllers. My first try was to authorize the model in an after_action hoook:
class CompaniesController < InheritedResources::Base
after_action :authorize_company, except: :index
def authorize_company
authorize #company
end
This let me use the default controller actions which define #company so I wouldn't hit the database twice. But, this is bad for destructive actions because it's going to not authorize the action after I've already messed up the database.
So, I've changed to using a before_action hook:
class CompaniesController < InheritedResources::Base
before_action :authorize_company, except: :index
def authorize_company
#company = Company.find(params.require(:id))
authorize #company
end
Now, I'm not allowing unauthorized people to delete resources, etc... but I'm hitting the database twice. Is there anyway to access #company without hitting the database twice?
Since your asking for the "rails way" this is how you would set this up in "plain old rails" without InheritedResources.
class CompaniesController < ApplicationController
before_action :authorize_company, except: [:new, :index]
def new
#company = authorize(Company.new)
end
def index
#companies = policy_scope(Company)
end
# ...
private
def authorize_company
#company = authorize(Company.find(params[:id]))
end
end
If you really want to use callbacks you would do it like so:
class CompaniesController < ApplicationController
before_action :authorize_company, except: [:new, :index]
before_action :authorize_companies, only: [:index]
before_action :build_company, only: [:new]
# ...
private
def authorize_company
#company = authorize(Company.find(params[:id]))
end
def authorize_companies
#companies = policy_scope(Company)
end
def build_companies
#company = authorize(Company.new)
end
end
Yeah you could write a single callback method with three code branches but this has lower cyclic complexity and each method does a single job.
Turns out rails controllers have a resource if the model exists and build_resource for actions like new.
class CompaniesController < InheritedResources::Base
before_action :authorize_company, except: :index
private
def authorize_company
authorize resource
rescue ActiveRecord::RecordNotFound
authorize build_resource
end
end
I want to use the before_action in application_controller.rb and then some skip_before_actions to prevent some sites from being called before a user is logged in.
But the defined function in my application_controller.erb is not called ...
application_controller.erb
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use :null_session instead.
protect_from_forgery with: :exception
layout "application"
before_action :user_logged_in, :set_locale
private
def set_locale
I18n.locale = params[:locale] || I18n.default_locale
end
# Prüft ob ein Nutzer eingeloggt ist.
def user_logged_in
puts "HA"
if session[:user_id].nil?
flash[:error] = "error"
redirect_to :controller => :startsites, :action => :index
else
flash[:error] = "ok"
redirect_to :controller => :startsites, :action => :index
end
end
end
The puts "HA" in user_logged_in is not printed in my server console. So I think the function is not called yet .. but why?
And in some controllers I tried to use this:
class MoviesController < ActionController::Base
skip_before_action :user_logged_in, only: [:index, :show]
also not working ... why?
Thank you very much for your help.
You are trying to call through ActionController. Its not possible that way, as you built it.
ActionController::Base
-ApplicationController #your method in this controller
ActionController::Base
-MoviesController #yr trying to skip it right here
To skip it, you have to inherit like below:
ActionController::Base
-ApplicationController #yr method is here
--MoviesController #it will find that method and skip it.
Controllers
# application_controller.rb
class ApplicationController < ActionController::Base
end
# movies_controller.rb
class MoviesController < ApplicationController
end
I wan't to use the before_action in application_controller.rb
and then some skip_before_actions ...
bit the defined function is not called ...
application_controller.rb
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use :null_session instead.
protect_from_forgery with: :exception
layout "application"
before_action :user_logged_in, :set_locale
private
def set_locale
I18n.locale = params[:locale] || I18n.default_locale
end
# Prüft ob ein Nutzer eingeloggt ist.
def user_logged_in
puts "HA"
if session[:user_id].nil?
flash[:error] = "error"
redirect_to :controller => :startsites, :action => :index
else
flash[:error] = "ok"
redirect_to :controller => :startsites, :action => :index
end
end
end
The puts "HA" in user_logged_in is not shown ...
and in some controllers I tried to use this:
class MoviesController < ActionController::Base
skip_before_action :user_logged_in, only: [:index, :show]
also not working ... why?
Where are you looking for the puts? If you were to call the Rails logger instead, it would work.
Try to insert a binding.pry instead of the puts and see what happens (you obviously need to have pry installed on your machine)
I am new to RoR. So far in my project, I worked with Devise gem for authentication. All work's fine. But I want to get json unauthentic access for API on index. I tried little bit for that.
In my Application Controller.
class ApplicationCotroller < Action Controller::Base
protect_from_forgery_with :exception, :null_session => true
before_action :authenticate_user!, except: :index
end
This is my Product Controller index.
class ProductsController < ApplicationController
skip_before_action :authenticate_user!, only: :index, if: -> { request.format.json? }
before_action :set_product, only: [:show, :edit, :update, :destroy]
def index
#products = Product.all
respond_to do |format|
format.html
format.json { render json: #products}
end
end
When I request to get json
http://localhost:3000/products.json
It works fine. even this will load also the UI index page.
I need only to check if it is JSON request comes.
How to achieve this?
Try this:
class ProductsController < ApplicationController
skip_before_action :authenticate_user!, if: :skip_authenticate_user
def index
...
end
protected
def skip_authenticate_user
action_name=='index' && (request.format.json? || request.format.xml?)
end
end
Try adding skip_before_action in your ProductsController:
class ProductsController < ApplicationController
skip_before_action :authenticate_user!, only: :index
def index
...
end
end
This will ensure that the authentication_user! method is skipped for ProductsController index action.