Rails Save Record into Database

We can save data into database using Ruby on Rails. Let's see an example to save data of a form into database.

Step 1 Create a new Rails application.

Step 2 Change your directory to login.

Step 3 Create scaffold from the console.

Step 4 Migrate your database.

Step 5 Go to Gemfile and uncomment the following line.

Step 6 Run the following command:

Step 7 Go to app/controllers/users_controller.rb and write the following code in create method.

def create 
    @user = User.new(user_params) 

    respond_to do |format| 
      if @user.save 
        format.html { redirect_to users_url, notice: 'User was successfully created.' } 
        format.json { render :show, status: :created, location: @user } 
      else 
        format.html { render :new } 
        format.json { render json: @user.errors, status: :unprocessable_entity } 
      end 
    end 
  end

Step 8 Go to app/views/users/index.html.erb file.

<h1>Listing Users</h1> 

<% if notice %> 
<p id="notice"> <%= notice %> 
</p>
<%= link_to 'New User', new_user_path %>

Step 9 Go to app/views/users/new.html.erb file.

<h1>New User</h1> 

<%= render 'form', user: @user %> 

<%= link_to 'Back', users_path %> 

Step 10 Go to app/views/users/_form.html.erb file.

<%= form_for(user) do |f| %> 
  <% if user.errors.any? %> 
    <div id="error_explanation"> 
      <h2><%= pluralize(user.errors.count, "error") %> prohibited this user from being saved:</h2> 

      <ul> 
      <% user.errors.full_messages.each do |message| %> 
        <li><%= message %></li> 
      <% end %> 
      </ul> 
    </div> 
  <% end %> 

  <div class="field"> 
    <%= f.label :name %> 
    <%= f.text_field :name %> 
  </div> 

  <div class="field"> 
    <%= f.label :password %> 
    <%= f.password_field :password %> 
  </div> 

  <div class="field"> 
    <%= f.label :password_confirmation %> 
    <%= f.password_field :password_confirmation %> 
  </div> 

  <div class="actions"> 
    <%= f.submit %> 
  </div> 
<% end %> 

Step 11 Start the Rails server.

Step 12 Run it on localhost.