change route

app/controllers/users/admins_controller.rb → app/controllers/admins_controller.rb

-class Users::AdminsController < ApplicationController
+class AdminsController < ApplicationController
   before_action :authenticate_user!, only: :index
 
   def index
@@ -14,7 +14,7 @@ class Users::AdminsController < ApplicationController
   def get_applied_jobs
     if params[:search_user]
       user = User.find_by(email: params[:search_user])
-      return redirect_to users_admin_path, notice: "User/job not found!" if user.blank?
+      return redirect_to admin_path, notice: "User/job not found!" if user.blank?
 
       applied_jobs = user.jobs
       applied_jobs.page(params[:page]).per(Settings.job.per_page)

app/models/user.rb

@@ -37,6 +37,6 @@ class User < ApplicationRecord
          :recoverable, :rememberable, :validatable
 
   def self.list_emails
-    @emails ||= self.all.pluck(:email)
+    @emails ||= all.pluck(:email)
   end
 end

app/views/users/admins/index.html.erb → app/views/admins/index.html.erb

 <h4>Search user's applied jobs:</h4>
 
-<%= form_tag(users_admin_path, method: :get) do |f| %>
+<%= form_tag(admin_path, method: :get) do |f| %>
   <%= select_tag :search_user, options_for_select(User.list_emails, params[:search_user]), include_blank: "Choose user's email" %>
   <%= submit_tag "Search" %>
 <% end %>

config/routes.rb

@@ -14,11 +14,11 @@ Rails.application.routes.draw do
   devise_for :users
   root "tops#index"
   namespace :users do
-    get "admin", to: "admins#index", as: :admin
     resource :my_page, only: :show do
       collection do
         get "jobs", action: :applied_jobs, as: :applied_jobs
       end
     end
   end
+  get "admin", to: "admins#index", as: :admin
 end