Ruby on Rails Scaffold: Create Your App In Minutes

Ruby on Rails Scaffold: Create Your App In Minutes

Are you eager to dive into the world of web development and bring your app idea to life? Look no further than Ruby on Rails Scaffold – your ultimate shortcut to building a functional web application in a matter of minutes. 

This powerful feature within the Ruby on Rails framework empowers developers, both novice and experienced, to swiftly create the foundation of their applications, allowing you to focus on the unique features and functionality that make your app truly stand out.

Let’s dig into everything about Ruby on Rails scaffold.

Scaffolding Meaning

A scaffolding project can build some of an application’s key components quickly. 

Scaffolding is used to automatically generate a collection of models, views, and controllers for a new resource in a single process.

MVC frameworks enable scaffolding, a method that allows programmers to declare the possible uses for an application database. 

The pre-defined code templates are effectively used as a “scaffold” by the framework or compiler to create the final code that the application can use to execute CRUD (Create, Read, Update, and Delete) on database entries.

Scaffolding takes place during the design time and run time phases of the program lifecycle. 

Scaffolding during design time creates code files that the programmer can later edit. Run-time scaffolding generates code as-needed. 

It enables modifications to the template design to be instantly reflected throughout the application.

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What Is Ruby on Rails Scaffold?

What is Ruby on Rails Scaffold, you ask? Imagine a virtual construction assistant that assembles the basic framework of your web app, complete with models, views, controllers, and even database integration, sparing you the arduous process of setting up these components manually. 

The Rails framework helped popularize scaffolding.

Whether you’re envisioning a sleek e-commerce platform, a lively social network, or an informative blog, Ruby on Rails Scaffold streamlines your initial development stages, getting you up and running with minimal effort.

The process is straightforward and user-friendly. By entering just a few simple commands, you can generate all the essential files and code snippets required for a functional web app. 

A single command, and voilà – your models are defined, database tables are created, and the views to interact with your data are readily available. 

With a few more commands, your controllers are set up to manage the logic behind your application, effortlessly handling user requests and responses.

Rails will create the necessary data interfaces at runtime when the line scaffold :model_name is added to a controller.

Rails generate scaffold model_name is an external command that may be used to generate Ruby code for the scaffold in advance. 

The script’s output includes files with Ruby code that applications can use to communicate with databases.

As of Rails 2.0, dynamic scaffolding is no longer supported.

Features Of Rails Scaffold

Rails Scaffold is a programming approach provided by the MVC framework that programmers use to define the potential uses for application data. 

Applications construct the final code that performs various processes, such as CRUD, using a preset code template.


  • It happens twice, once during design and once during run.
  • Programmers can subsequently alter design time files.
  • Run time generates code as it goes.
  • The application updates promptly when the design templates are modified.

Let’s explore all the advantages of using Rails scaffold.

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Benefits Of Using Ruby on Rails Scaffold

Models Made Easy

Define your data structure effortlessly. With one command, Ruby on Rails Scaffold generates model classes along with the corresponding database migrations. 

Declare your data attributes, associations, and validations directly in these models – it’s like crafting the blueprint for your app’s database.

Views at Your Fingertips

Interact with your data right from the start. 

Ruby on Rails Scaffold generates basic view templates that display your app’s data, providing you with instant visual feedback and a foundation to build upon. 

Customize these views to match your app’s unique design and user experience.

Controllers On Demand

The brain of your app is just a command away. Ruby on Rails Scaffold creates controller files and actions, enabling you to define the logic behind user interactions. 

Seamlessly manage incoming requests, process data, and orchestrate responses – all without breaking a sweat.

Database Done Right

Say goodbye to manual database setup. Ruby on Rails Scaffold automates the creation of database tables, ensuring that your app’s data is efficiently organized and stored. 

Harness the power of ActiveRecord, Rails’ built-in ORM (Object-Relational Mapping), to interact with your database without writing complex SQL queries.

RESTful Routes in Seconds

Achieve structured and intuitive navigation. Ruby on Rails Scaffold sets up RESTful routes – Ruby on Rails Routes for your resources, enabling smooth and consistent user journeys throughout your application.

While Ruby on Rails Scaffold provides an incredible head start, remember that it’s just the beginning of your development journey.

As your app evolves, you can easily fine-tune, expand, and customize every aspect of your codebase to align with your vision.

And Now, if you are wondering where to start your project, then we suggest you should get help from ruby on rails development company for proper guidance and great outcomes. 

Rails Scaffolding Example

Let’s establish a database called cookbook and a table called recipes to better understand scaffolding.

Developing a blank Rails web app

Go to the location where you want to build this recipe web application and open the command window. 

In order to establish a complete directory structure, issue the following command.

tp> rails new cookbook

Database Configuration

This is how you make a database:

mysql> create database cookbook;

Query OK, 1 row affected (0.01 sec)

mysql> grant all privileges on cookbook.*

to ‘root’@’localhost’ identified by ‘password’;

Query OK, 0 rows affected (0.00 sec)


Query OK, 0 rows affected (0.00 sec)

Edit the cookbook \ config \ database.yml configuration file and update the database name to cookbook to instruct Rails where to find the database.

Don’t enter a password. When finished, it ought to resemble this:


   adapter: mysql

   database: cookbook

   username: root

   password: [password]

   host: localhost


   adapter: mysql

   database: cookbook

   username: root

   password: [password]

   host: localhost


   adapter: mysql

   database: cookbook

   username: root

   password: [password]

   host: localhost

With Rails, you can use many databases when working in development, test, or production mode. For each, this program makes use of the same database.

Generated scaffolding code

Rails action uses the scaffold to produce all the necessary code on the fly. 

We can write all the code to disk and then analyze it and begin customizing it to meet our needs by executing scaffold as a script.

So let’s now restart manually creating the scaffold code using the scaffold helper script:

cookbook> rails generate scaffold recipe

The auto-files it produces are displayed below:


Let’s see the code written behind the controller. The scaffold generator generated the shown code.

You may find the following by opening app / controllers / recipes_controller.rb:

class RecipesController < ApplicationController

   before_action :set_recipe, only: [:show, :edit, :update, :destroy]

   # GET /recipes

   # GET /recipes.json

   def index

      @recipes = Recipe.all


   # GET /recipes/1

   # GET /recipes/1.json

   def show


   # GET /recipes/new

   def new

      @recipe =


   # GET /recipes/1/edit

   def edit


   # POST /recipes

   # POST /recipes.json

   def create

      @recipe =

      respond_to do |format|


            format.html { redirect_to @recipe, notice: ‘Recipe was successfully created.’ }

            format.json { render :show, status: :created, location: @recipe }


            format.html { render :new }

            format.json { render json: @recipe.errors, status: :unprocessable_entity }




   # PATCH/PUT /recipes/1

   # PATCH/PUT /recipes/1.json

   def update

      respond_to do |format|

         if @recipe.update(recipe_params)

            format.html { redirect_to @recipe, notice: ‘Recipe was successfully updated.’ }

            format.json { render :show, status: :ok, location: @recipe }


            format.html { render :edit }

            format.json { render json: @recipe.errors, status: :unprocessable_entity }




   # DELETE /recipes/1

   # DELETE /recipes/1.json

   def destroy


         respond_to do |format|

         format.html { redirect_to recipes_url, notice: ‘Recipe was successfully destroyed.’ }

         format.json { head :no_content }




   # Use callbacks to share common setup or constraints between actions.

   def set_recipe

      @recipe = Recipe.find(params[:id])


   # Never trust parameters from the scary internet, only allow the white list through.

   def recipe_params

      params.require(:recipe).permit(:tittle, :instructions)



A Rails application’s user can choose an action, such as “show,” and the controller will run any relevant code, such as “def show,” before automatically displaying the template “show.html.” Euroradio.” This default action can be changed.

The controller transfers data to and from the database tables by using ActiveRecord methods like find, find_all, new, save, update_attributes, and destroy. Note that rails does that automatically; you don’t need to create any SQL statements.

The database table will come to life with only one line of code. It will offer a straightforward interface to your data and operations:

  • Creating new records;
  • Editing current records;
  • Viewing current records;
  • Destroying current records.

In the process of creating or changing a record, Scaffold will handle all the tedious tasks for you, including designing and processing forms. 

Scaffold even offers smart form generation by supporting the following sorts of input data:

  • Simple text strings;
  • Text areas (or large blocks of text);
  • Date selectors;
  • Date and time selectors.

Table creation and maintenance are both possible with Rails Migrations.

rake db:migrate RAILS_ENV=development

Now use the command below to launch the web server from the cookbook directory:

cookbook> rails server

Table creation and maintenance are both possible with Rails Migrations.

rake db:migrate RAILS_ENV=development

Now use the command below to launch the web server from the cookbook directory:

cookbook> rails server

Go to in your browser now. 

You will then be presented with a screen where you can add new entries to the prescription table. The image below is a screenshot.

Your entry will be added to the recipe table once you click the “Create” button to add a new recipe, and the following outcome will be displayed:

You can see the options for editing, displaying, and erasing records. So experiment with these choices.

Using the URL, you may also view a complete list of all the recipes that are present in the recipe table.

Enhance the model

You get a ton of error handling for free with Rails. Add some validation criteria to the blank recipe model to better comprehend this.

After making the following changes to app / models / recipe.rb, test your application:

class Recipe < ActiveRecord::Base

   validates_length_of :title, :within => 1..20

   validates_uniqueness_of :title, :message => “already exists”


These submissions will automatically validate:

  • validates_length_of — verifies that the field is not excessively lengthy or empty.
  • validates_uniqueness_of — checks the originality of; repeated values are blocked. Here, we provided our own message rather than the standard Rails error message.
  • validates_length_of — this indicates that the field is not excessively lengthy or empty.

An alternative method of creating scaffolding

Make the application as illustrated above, and the scaffold code generated as illustrated below.

rails g scaffold Recipe tittle:string instructions:text

The aforementioned code creates automatic sqlite3 database files with a header and an instruction column, as seen in the image below.

The database must be moved using the following syntax.

$ rake db:migrate RAILS_ENV=development

Last but not least, launch the program by using the following command line:

rails server

The outcome will be as seen in the images above.

The scaffold command generates every view, which is then made available in the app / views / recipes directory along with the controller methods that go with it.

With all this, if you want to update and maintain your existing project, then definitely you should contact someone like us, RORBits – Ruby on Rails Maintenance & Support Services.

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Rails Scaffolding With Extra Fields

The boilerplate code for a model, view, and controller will now be generated by the aforementioned code. 

However, there are instances when employing scaffolding additional fields in the model that are not present in the default scaffold may be required. 

The table’s characteristics with automatically generated timestamps, such as the created_at and updated_at fields, are known as default fields. We can simply add more fields while creating the scaffold if we need to.

For instance, one can use the following command to create a new Task resource with extra fields like description, title, and completed in addition to the typical parameters like timestamps:

rails generate scaffold Task title: the string completed: boolean description: text

Three attributes/fields will be present in the model created by the aforementioned command:

  • title
  • completed
  • description

Now that the new fields have been added, we can migrate the database to include them. We’ll also update the views and controllers to reflect the new fields.

Nested Scaffold

For Rails 4.2 and 5, the command “Nested Scaffold” creates a collection of flawlessly functional nested resources.


  • Uses a single command to create a resource with a nested child.
  • Creates a set of flawlessly functional code.
  • Automatically produces suitable model associations for ActiveRecord.
  • Haml-ready.


The following command should be used to install nested scaffold.

gem ‘nested_scaffold’  


In conclusion, Ruby on Rails Scaffold is your time-saving ally, enabling you to create a functional web app foundation in minutes. 

Whether you’re a seasoned developer looking to accelerate your workflow or a newcomer excited to bring your app idea to life, Ruby on Rails Scaffold empowers you to focus on what truly matters – building innovative features and crafting an exceptional user experience. 

So, why wait? Dive into the world of Ruby on Rails Scaffold and embark on your web development adventure today! Hire ruby on rails consulting to get better guidance and assistance on web development.


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Hire RoR Developers on Hourly or Monthly Basis

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Frequently Asked Questio ns (FAQs)

Can immediately present themselves to users for feedback and can study the generated code to learn how Rails works.

Use the rake db: rollback command to first execute a rollback.

While Dynamic Scaffolding generates the whole content at run time, Static Scaffolding requires user insertion commands to create data fields.

Mitul Patel
Mitul Patel

Mitul Patel, Founded RORBits, one of the Top Software Development Company in 2011 offer mobile app development services across the globe. His visionary leadership and flamboyant management style have yield fruitful results for the company.

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