Ruby on Rails: Search for database items (students) - ruby-on-rails

Question

I have 2 questions.
I want to add a search to my database. All items of my database are shown at the main page, there's a list where you can see all of the students. Can anyone tell me how I can add a function to my search? Where should I start, what should I create? And can you also tell me what any of that steps are doing? And how can I display the search results?
<p class="lead">Student management at a glance.
<form class="form-inline my-2 my-lg-0">
<!-- Search should be here -->
</form>
</div>
</div>
</div>
<!-- Student Summary -->
<div class="row justify-content-md-center">
<div class="col-12">
<div class="card">
<div class="card-header">
<i class="fas fa-graduation-cap"></i> Students
<div class="btn-group float-right">
<%= link_to new_student_path, :class => "btn btn-outline-dark btn-sm" do %>
<i class="fa fa-plus fa-fw"></i>
New
<% end %>
</div>
</div>
<table class="table table-hover">
<thead class="thead">
<tr>
<th scope="col"><div class="btn btn-fhg-0"><i class="fas fa-hashtag"></div></i></th>
<th scope="col"><div class="btn btn-fhg-0"><%= sort_link "surname", "Name, Surname" %></div></th>
<th scope="col"><div class="btn btn-fhg-0"><%= sort_link "room_id", "Room" %></div></th>
<th scope="col"><div class="btn btn-fhg-0"><%= sort_link "harddrive_id", "Hard Drive" %></div></th>
<th scope="col"><div class="btn btn-fhg-0"><%= sort_link "key_id", "Key" %></div></th>
<th scope="col"><div class="btn btn-fhg-0"><%= sort_link "os", "OS" %></div></th>
<th scope="col"><div class="btn btn-fhg-0"><%= sort_link "manager" %></div></th>
<th scope="col"><div class="btn btn-fhg-0"><%= sort_link "pawn" %></div></th>
<th scope="col"><div class="btn btn-fhg-0"><%= sort_link "eol", "EOL" %></div></th>
<th scope="col"><div class="btn btn-fhg-0"><%= sort_link "comment" %></div></th>
<th scope="col"><div class="btn btn-fhg-0"><i class="fas fa-bars"></i></div></i></th>
</tr>
</thead>
<tbody>
<% counter = 1 %>
<% #students.each do |student| %>
<tr>
<td class="align-middle"><%= counter %></td>
<td class="align-middle"><%= student.to_s %></td>
<td class="align-middle"><%= Room.find(student.room_id).to_s %></td>
<td class="align-middle"><%= student.harddrive %></td>
<td class="align-middle"><%= student.key %></td>
<td class="align-middle"><%= student.os.capitalize %></td>
<td class="align-middle"><%= student.manager %></td>
<td class="align-middle"><%= student.pawn ? 'Paid' : 'Not paid' %></td>
<td class="align-middle"><%= student.eol.strftime("%d.%m.%Y") %></td>
<td class="align-middle" data-toggle="popover" title="<%= student.to_s %>" data-content="<%= student.comment %>"><%= truncate(student.comment, length: 30, separator: ' ') %></td>
<td>
I also want to list the amount of items of a category I have saved in my database. As example:
There are 50 students, 60 hard drives, 70 keys and 80 rooms.
Is it possible to list the exact amount of items on my page? Something like
<h1>There are <%= amount of students %> total queries.</h1>
Thanks!

Answer 1

You should create a StudentsController and add a search method in it to search for the students.
eg. below search method will search students on the basis of name
class StudentsController < ApplicationController
def search
#students = Student.where(name: params[:name])
end
end
And in routes
resources :students do
collection do
get :search
end
end