CRUD operations through models in Ruby on Rails - Mini Project: Build & Apply

CRUD Operations Through Models in Rails

📖 Scenario: You are building a simple Rails app to manage a list of books in a library. Each book has a title and an author.

🎯 Goal: Learn how to create, read, update, and delete book records using Rails models.

📋 What You'll Learn

Create a Book model with title and author attributes

Add a variable to hold a sample book's title

Use the Book model to create a new book record

Update the book's author and then delete the book record

💡 Why This Matters

🌍 Real World

Managing data records like books, users, or products is common in web apps. Rails models make it easy to create, read, update, and delete these records.

💼 Career

Understanding CRUD operations through models is essential for backend Rails developers to handle database interactions cleanly and efficiently.

1

Create the Book model with attributes

Create a Rails model called Book with string attributes title and author using rails generate model Book title:string author:string.

Ruby on Rails

# Run the rails generate command to create the Book model
# Your code here

Need a hint?

Use the Rails generator to create a model with the exact attribute names title and author.

2

Add a variable for a sample book title

In the Rails console or a Ruby file, create a variable called sample_title and set it to the string 'The Great Gatsby'.

Ruby on Rails

# Create a variable sample_title with value 'The Great Gatsby'
# Your code here

Need a hint?

Assign the exact string 'The Great Gatsby' to the variable sample_title.

3

Create a new Book record using the model

Use the Book.create method to create a new book with title set to sample_title and author set to 'F. Scott Fitzgerald'.

Ruby on Rails

sample_title = 'The Great Gatsby'

# Create a new Book record with title sample_title and author 'F. Scott Fitzgerald'
# Your code here

Need a hint?

Use Book.create with a hash of attributes for title and author.

4

Update and delete the Book record

Update the author of the book variable to 'Francis Scott Fitzgerald' using update. Then delete the book record using destroy.

Ruby on Rails

sample_title = 'The Great Gatsby'

book = Book.create(title: sample_title, author: 'F. Scott Fitzgerald')

# Update book author to 'Francis Scott Fitzgerald'
# Then delete the book record
# Your code here

Need a hint?

Use update on the book object to change the author, then call destroy to remove it.