Implement searching for users

Author: nygrenh

app/controllers/users_controller.rb

@@ -6,6 +6,11 @@ class UsersController < ApplicationController
 
   after_action :remove_x_frame_options_header_when_bare_layout, only: [:new, :create, :show]
 
+  def index
+    respond_access_denied unless current_user.administrator?
+    @users = User.search(params[:search])
+  end
+
   def new
     add_breadcrumb 'Sign up', new_user_path
 

app/models/user.rb

@@ -253,6 +253,11 @@ def generate_password_reset_link
     url
   end
 
+  def self.search(query)
+    return User.none unless query
+    User.where('lower(email) LIKE ?', "%#{query.strip.downcase}%")
+  end
+
   private
 
   def course_ids_arel

app/views/layouts/_navigation.html.erb

@@ -12,6 +12,7 @@
       <ul class="navbar-nav">
         <% if signed_in? %>
           <% if current_user.administrator? %>
+            <li class="nav-item"><%= navigation_link 'Users', users_path %></li>
             <li class="nav-item"><%= navigation_link 'Course templates', course_templates_path %></li>
           <% end %>
         <% end %>

app/views/users/_user.html.erb

@@ -0,0 +1,4 @@
+<div>
+<%= link_to user.login, participant_path(user) %>
+<%= user.email %>
+</div>

app/views/users/index.html.erb

@@ -0,0 +1,15 @@
+<h1>All users</h1>
+
+<%= form_tag(users_path, method: :get) do %>
+  <div class="form-group">
+    <label for="search">Search by email</label>
+    <%= text_field_tag(:search, params[:search], class: "form-control", id: "search") %>
+  </div>
+  <%= submit_tag(:search, class: "btn btn-primary") %>
+<% end %>
+
+<br>
+
+<% if @users %>
+  <%= render @users %>
+<% end %>

config/routes.rb

@@ -237,6 +237,8 @@
   get '/users/:user_id/verify/:id', to: 'users#confirm_email', as: 'confirm_email'
   post '/users/:user_id/send_verification_email', to: 'users#send_verification_email', as: 'send_verification_email'
 
+  resources :users, only: [:index]
+
   post '/users/:user_id/send_destroy_email', to: 'users#send_destroy_email', as: 'send_destroy_email'
   get '/users/:user_id/destroy/:id', to: 'users#verify_destroying_user', as: 'verify_destroying_user'
   delete '/users/:user_id/destroy/:id', to: 'users#destroy_user', as: 'destroy_user'