Ruby on Rails View Record from Database

by Online Tutorials Library July 14, 2022

Rails View Record from Database

We will see an example to view data in an application.

Step 1 Create a new Rails application.

Step 2 Change your directory to save.

Step 3 Create a controller from the console.

Step 4 Create a model from the console.

 rails g model product name:string price:decimal short_description:text full_description:text 

Step 5 Go to app/controllers/products_controller.rb and write the following code.

 class ProductsController < ApplicationController       # GET method to get all products from database    def index      @products = Product.all    end       # GET method to get a product by id    def show      @product = Product.find(params[:id])    end       # GET method for the new product form    def new      @product = Product.new    end       # POST method for processing form data    def create      @product = Product.new(product_params)      if @product.save        flash[:notice] = ‘Product added!’        redirect_to root_path      else        flash[:error] = ‘Failed to edit product!’        render :new      end    end     def destroy      @product = Product.find(params[:id])      if @product.delete        flash[:notice] = ‘Product deleted!’        redirect_to root_path      else        flash[:error] = ‘Failed to delete this product!’        render :destroy      end    end       def product_params      params.require(:product).permit(:name, :price, :old_price, :short_description, :full_description)    end     end  

Step 6 Run the following command:

Step 7 Go to app/views/products/index.html.erb file.

 <h3>STOCK LIST</h3>             <div>          <%= link_to ‘Add Product’, new_product_path %>        </div>        <br>            <table class=”table table-bordered table-striped”>         <tr>          <th>Name</th>          <th>Price</th>          <th>Description</th>                 </tr>              <% @products.each do |product| %>            <tr>              <td><%= product.name %></td>              <td><%= product.price %></td>              <td><%= truncate(product.short_description, :length => 75) %></td>                  <td><%= link_to ‘Delete’, product_path(product), method: :delete %></td>                          </tr>        <% end %>      </table> 

Step 8 Go to app/views/products/new.html.erb file.

 <%= form_for @product, url: {action: :create} do |f| %>                 <h3>Add a Product</h3>           <div class=”field”>              <%= f.label :name %>                <%= f.text_field :name %>          </div>           <div class=”field”>               <%= f.label :price %>               <%= f.text_field :price %>          </div>           <div class=”field”>             <%= f.label :short_description %>                <%= f.text_field :short_description %>          </div>   </p>        </div>        <div class=”actions”>          <%= link_to ‘Back’, { controller: ‘products’, action: ‘index’} %>          <%= f.submit ‘Create Product’ %>        </div>    <% end %>  </div> 

Step 9 Start the server.

Step 10 Run it on localhost.

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