Rails

Commands	Descriptions
Initialization
rails new <app_name> -T -d <database>	Creates a new rails application with tests files skipped, and database settings preconfigured with selected database
rails new <app_name> --api -T -d <database>	Creates a new rails application preconfigured with smaller stacks for API only apps, test files skipped, and database settings preconfigured with selected database
rails db:create	Creates database
Database
rails db:migrate	Migrate the database
rails db:setup	Creates the database, load the schema and initialize it with the seed data.
Server
rails s	Starts up Rails application
rails s -p <port>	Starts up Rails application with specified port. Eg. rails s -p 5000
Generators
rails g scaffold <Resource> <field:type>	Creates a scaffold for a resource. Scaffold creates the model, database migration for the model, controller, view, and test suite of the resource. Eg. rails g scaffold Blog title:string body:text
rails g controller <Name> <action ...>	Creates a controller with actions specified. Eg. rails g controller Pages home about contact
rails g model <Name> <field:type>	Creates a model with migration. Eg. rails g model Skill title:string percent:integer
rails g resource <Resource> <field:type>	Similar to scaffolds, but a skinnier version of it. It doesn't include the actions in controller, no views being created, etc Eg. rails g resource Portfolio title:string body:text
rails g migration Create<TableName> <field:type>	Generates a migration with the name. Eg. rails g migration CreateUsers name:string age:integer will create a table users with name and age column.
rails g migration Add<Field>To<Table> <field:type>	Generates a migration that adds a field to the table. Eg. rails g migration AddAddressToUsers address:text will create a migration that adds the address column to the users table.
rails g migration Remove<Field>From<Table> <field:type>	Generates a migration that removes a field from the table. Eg. rails g migration RemoveAddressFromUsers address:text will create a migration that removes the address column from the users table.
rails g migration Add<Column>RefTo<Table> <column>:references	Generates a migration that adds a reference to the table for the specified column. Eg. rails g migration AddCategoryRefToBlogs category:references will create a migration that adds a reference to the blogs table for category
Credentials
rails credentials:edit	Edit credentials
rails credentials:show	Show credentials
Etc
rails c	This command lets you interact with your Rails application from the command line
rails c --sandbox	The --sandbox will allow you to test out some code without changing any data. Any modifications you make will be rolled back on exit.
rails routes	List all defined routes