fix redirect link after signin, check is_applied_job in detail job

app/controllers/jobs_controller.rb

@@ -9,5 +9,6 @@ class JobsController < ApplicationController
 
   def show
     @job = Job.find_by(id: params[:id])
+    @is_not_applied = user_signed_in? ? current_user.applied_jobs.find_by(job_id: @job.id).blank? : true
   end
 end

app/controllers/users/sessions_controller.rb

@@ -26,6 +26,6 @@ class Users::SessionsController < Devise::SessionsController
   # end
 
   def after_sign_in_path_for(resource)
-    my_page_path #your path
+    stored_location_for(resource) || my_page_path
   end
 end

app/views/jobs/show.html.erb

@@ -31,15 +31,16 @@
     <%= @job.description.html_safe %>
   </div>
   <div class="col-2">
-    <% is_not_applied = user_signed_in? ? current_user.applied_jobs.find_by(job_id: @job.id).blank? : true %>
-    <%= link_to_if is_not_applied, 'Apply Now', new_applied_job_path(job_id: @job.id), class: 'btn btn-outline-success btn-lg' do %>
+    <%= link_to_if @is_not_applied, 'Apply Now', new_applied_job_path(job_id: @job.id), class: 'btn btn-outline-success btn-lg' do %>
       <%= link_to 'Apply Now', '#', class: 'btn btn-outline-secondary btn-lg disabled' %>
     <% end %>
   </div>
 </div>
 <div class="row my-3">
   <div class="col-6 text-right">
-    <%= link_to 'Apply Now', new_applied_job_path(job_id: @job.id), class: 'btn btn-outline-success btn-lg' %>
+    <%= link_to_if @is_not_applied, 'Apply Now', new_applied_job_path(job_id: @job.id), class: 'btn btn-outline-success btn-lg' do %>
+      <%= link_to 'Apply Now', '#', class: 'btn btn-outline-secondary btn-lg disabled' %>
+    <% end %>
   </div>
   <div class="col-6 text-left">
     <%= link_to 'Favorite', '#', class: 'btn btn-outline-danger btn-lg' %>

config/routes.rb

 Rails.application.routes.draw do
-  devise_for :users, controllers: { sessions: 'users/sessions', registrations: 'users/registrations' }
   root to: 'home#index'
+  devise_for :users, controllers: { sessions: 'users/sessions', registrations: 'users/registrations' }
+  
   get 'cities', to: 'locations#index'
   get 'industries', to: 'industries#index'
   get 'detail/:id', to: 'jobs#show', as: :job
   get 'jobs/:model/:slug', to: 'jobs#index', as: :jobs
+
   get 'my', to: 'users#my_page', as: :my_page
   resources :users, only: :show
+
   get 'apply', to: 'applied_jobs#new', as: :new_applied_job
   post 'confirm', to: 'applied_jobs#confirm', as: :confirm_applied_job
   post 'finish', to: 'applied_jobs#finish', as: :finish_applied_job