Rails MVC Overview

• Explanation of Model, View, Controller (MVC) architecture in Rails.
• Details on how Rails handles web requests and routing.

Convention over Configuration

• Introduction to Rails' opinionated framework and default behaviors.

Saving State in Rails

• Explanation of how to store state data in Rails applications.

Rails Request Handling

• Explanation of HTTP verbs, routing, and controller methods in Rails.

Getting Started with a Customer App

• Fork and clone the repository, install gems, and set up a new Rails application.
• Generate scaffold for Customer model and set the root path.

Rails Debugging

• Introduction to Ruby's built-in debugger and how to use it in Rails.
• Debugging practice with a sample error.

Exception Handling

• Adding exception handling in the CustomersController.
• Displaying user-friendly error messages using flash alerts.

Model Validations

• Adding and testing validations for the Customer model.
• Introduction to the email-validator gem for email validation.

Error Handling in Controllers

• Implementing error handling in the create and update methods of the CustomersController.
• Displaying validation errors to users.

Additional Model Methods

• Adding a custom method in the Customer model and using it in the views.

Submitting Work

• Instructions on committing, pushing changes, and creating pull requests.

Rails MVC Overview

• Review the explanation of the Model, View, Controller (MVC) architecture.
• Understand how Rails handles web requests and routing.

Convention over Configuration

• Review Rails' opinionated framework and default behaviors.

Saving State in Rails

• Understand how to store state data in Rails applications.

Rails Request Handling

• Understand HTTP verbs, routing, and controller methods in Rails.

Getting Started with a Customer App

• Fork and clone the repository.
• Run bin/bundle install to install gems.
• Generate scaffold for Customer model: bin/rails generate scaffold Customer first_name:string last_name:string phone:string email:string.
• Run bin/rails db:migrate.
• Edit config/routes.rb to set root path: root to: 'customers#index'.

Rails Debugging

• Add debugger statement in customers_controller.rb before the failing line.
• Re-run the server and duplicate the error to practice debugging.
• Review and use debugger commands in the server console.

Exception Handling

• Add rescue_from ActiveRecord::RecordNotFound, with: :catch_not_found to customers_controller.rb.
• Implement catch_not_found method to handle exceptions.
• Test exception handling by accessing a non-existent customer.

Model Validations

• Add validations to Customer model.
• Add gem 'email_validator' to Gemfile and run bundle install.
• Test validations by creating and updating customers with invalid data.

Error Handling in Controllers

• Update create method in customers_controller.rb with error handling.
• Update update method in customers_controller.rb with error handling.
• Test error handling by creating and updating customers with invalid data.

Additional Model Methods

• Add full_name method to Customer model.
• Update views to use full_name method.
• Verify changes in the browser.

Submitting Work

• Commit and push changes to lesson8 branch.
• Create a pull request for the changes.
• Ensure all debugger statements are removed before pushing code.