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# == A any? B blank?, build C cache_key, cache_key_with_version, cache_version, create, create!, create_or_find_by, create_or_find_by! D delete, delete_all, delete_by, destroy, destroy_all, destroy_by E eager_loading?, empty?, encode_with, explain F find_or_create_by, find_or_create_by!, find_or_initialize_by I initialize_copy, insert, insert!, insert_all, insert_all!, inspect J joined_includes_va

Declare an enum attribute where the values map to integers in the database, but can be queried by name. Example: class Conversation < ActiveRecord::Base enum :status, [ :active, :archived ] end # conversation.update! status: 0 conversation.active! conversation.active? # => true conversation.status # => "active" # conversation.update! status: 1 conversation.archived! conversation.archived? # => tru

Ruby on Rails main@da3f2c5 Module ActionController::StrongParameters actionpack/lib/action_controller/metal/strong_parameters.rb Strong Parameters¶ ↑ It provides an interface for protecting attributes from end-user assignment. This makes Action Controller parameters forbidden to be used in Active Model mass assignment until they have been explicitly enumerated. In addition, parameters can be marke

Allows you to choose which attributes should be permitted for mass updating and thus prevent accidentally exposing that which shouldn’t be exposed. Provides methods for filtering and requiring params: expect to safely permit and require parameters in one step. permit to filter params for mass assignment. require to require a parameter or raise an error. Examples: params = ActionController::Paramet

Rails::Engine allows you to wrap a specific Rails application or subset of functionality and share it with other applications or within a larger packaged application. Every Rails::Application is just an engine, which allows for simple feature and application sharing. Any Rails::Engine is also a Rails::Railtie, so the same methods (like rake_tasks and generators) and configuration options that are

Ruby on Rails main@dac26fd RDOC_MAIN.md railties/RDOC_MAIN.md Welcome to Rails¶ ↑ What’s Rails?¶ ↑ Rails is a web-application framework that includes everything needed to create database-backed web applications according to the Model-View-Controller (MVC) pattern. Understanding the MVC pattern is key to understanding Rails. MVC divides your application into three layers: Model, View, and Controlle