ror.md

Ruby On Rails

Controller

bin/rails generate controller Articles index [--skip-routes]

Model

bin/rails generate model Article title:string body:text

Model names are singular, because an instantiated model represents a single data record. To help remember this convention, think of how you would call the model's constructor: we want to write Article.new(...), not Articles.new(...). source

Add field

Delete field

Edit field

Migration

Migrate

bin/rails db:migrate

Add record

bin/rails console

#Play with entity
entity = EntityClass.new(propertyOne: "value")
entity.save
entity
EntityClass.find(1)
EntityClass.all

Show all records

EntityClass.all

Seed database

#db/seeds.rb

# frozen_string_literal: true

EntityClass.destroy_all

EntityClass.create!(
  [
    { name: 'Foo' },
    { name: 'Bar' }
  ]
)

puts "Created #{EntityClass.count} entities"

rails db:seed

Migration

N2N with has_and_belongs_to_many

If you don't need to do anything with the relationship model, it may be simpler to set up a has_and_belongs_to_many relationship (though you'll need to remember to create the joining table in the database). source

Models

# models
# /!\ Do no forget plural
class Foo < ApplicationRecord
  has_and_belongs_to_many :bars
end

class Bar < ApplicationRecord
  has_and_belongs_to_many :foos
end

Migration's script

class SweetNameForMigration < ActiveRecord::Migration[7.0]
  def change
    # if needed
    create_table :foo do |t|
      # declare columns
    end

    # if needed
    create_table :bar do |t|
      # declare columns
    end

    create_table :modelas_modelbs, id: false do |t|
      t.belongs_to :foo
      t.belongs_to :bar
    end
  end
end

How to insert a dependant data in console

# Get entities for each associtation
foo = Foo.create({})
bar = Bar.create({})

bar.foos << foo
# or
foo.bars << bar

How display data of the association as nested data

render json: foo, include: :bar

bin/rails dbconsole

-- Play with database
SELECT * FROM table;

Routes

Show all routes

bin/rails routes

Filter routes by controller

rails routes -c[--controller]=controller_name

General

Show all commands

rails -T

Show all commands with a filter

rails -T test