Question

So I am trying to make a link to user’s profile! So I have this in User’s controller:

class UsersController < ApplicationController

  def new
    #defining the "@user" object for the form_for
    @user = User.new    
  end

  #defining a function for the "show" html file
  def show
    #get user id by URL address
    @user = User.find(params[:id])
  end

  #handling user login succes or failure
  def create
    @user = User.new(params[:user])
    if @user.save

        #using "flash" variable Ruby
        #flash[:success] = "Welcome to the Sample App!" <<< use this !!

        #render success page
        redirect_to @user
    else
        #render failure page (using error partial page)
        render 'new'
    end
  end

  #mine to show user profile
  def show_user

    render 'show'

  end
end

and in my routes.rb I got:

DemoApp::Application.routes.draw do

  get "intergration_test/authentication_pages"

  #Removed!
  #get "users/new"

  #ROOT page 
  root to: 'static_pages#home'

  #My routes
  match '/user_profile', to: 'users#show_user'

  #REST architecture for users
  resources :users

  #including the Sessions action
  resources :sessions, only: [:new, :create, :destroy]

  match '/signup',  to: 'users#new'
  match '/signin',  to: 'sessions#new'
  #Note the use of via: :delete for the signout route, which indicated that it should be invoked using an HTTP DELETE request
  match '/signout', to: 'sessions#destroy', via: :delete

end

So why does

  #mine to show user profile
  def show_user

    render 'show'

  end

returns me the error:

undefined method `email' for nil:NilClass

it is like the user is null! I am already logged in! so I should have a user active.
even if I use redirect_to @user it does not work! help?

Answer 1

I’m assuming the show template has access to ‘user’ via the @user instance variable. If so, then you need to set the instance variable:

def show_user
 @user = current_user // Or other method for getting the logged in user. 
 render 'show'
end