Ruby on Rails
- Getting started with Ruby on Rails
- Awesome Book
- Awesome Community
- Awesome Course
- Awesome Tutorial
- Awesome YouTube
- ActionCable
- ActionController
- ActionMailer
- Active Jobs
- Active Model Serializers
- ActiveJob
- ActiveModel
- ActiveRecord
- ActiveRecord Associations
- ActiveRecord Locking
- ActiveRecord Migrations
- Add a new column to a table
- Add a new column with an index
- Add a reference column to a table
- Add a self reference
- Add an unique column to a table
- Add column with default value
- Adding a NOT NULL constraint to existing data
- Adding multiple columns to a table
- Change an existing column’s type
- Changing Tables
- Checking migration status
- Create a hstore column
- Create a join table
- Create a new table
- Create an array column
- Forbid null values
- Redo migrations
- Remove an existing column from a table
- Rollback migrations
- Run specific migration
- Running migrations
- Running migrations in different environments
- ActiveRecord Query Interface
- ActiveRecord Transactions
- ActiveRecord Transactions
- ActiveRecord Validations
- ActiveSupport
- Add Admin Panel
- Adding an Amazon RDS to your rails application
- Asset Pipeline
- Authenticate Api using Devise
- Authorization with CanCan
- Caching
- Change a default Rails application enviornment
- Change default timezone
- Class Organization
- Configuration
- Configuration
- Configure Angular with Rails
- Debugging
- Decorator pattern
- Deploying a Rails app on Heroku
- Elasticsearch
- Factory Girl
- File Uploads
- Form Helpers
- Friendly ID
- Gems
- I18n - Internationalization
- Import whole CSV files from specific folder
- Integrating React.js with Rails Using Hyperloop
- Model states: AASM
- Mongoid
- Multipurpose ActiveRecord columns
- Naming Conventions
- Nested form in Ruby on Rails
- Payment feature in rails
- Prawn PDF
- Rails 5
- Rails 5 API Authetication
- Rails API
- Rails Best Practices
- Rails Cookbook - Advanced rails recipes/learnings and coding techniques
- Rails Engine - Modular Rails
- Rails -Engines
- Rails frameworks over the years
- Rails generate commands
- Rails logger
- Rails on docker
- React with Rails using react-rails gem
- Reserved Words
- Routing
- RSpec and Ruby on Rails
- Safe Constantize
- Securely storing authentication keys
- Shallow Routing
- Single Table Inheritance
- Testing Rails Applications
- Tools for Ruby on Rails code optimization and cleanup
- Turbolinks
- Upgrading Rails
- User Authentication in Rails
- Using GoogleMaps with Rails
- Views
Ruby on Rails ActiveRecord Migrations Forbid null values
Example
To forbid null values in your table columns, add the :null parameter to your migration, like this:
class AddPriceToProducts < ActiveRecord::Migration
def change
add_column :products, :float, null: false
end
end
