#아무말 #주절주절

꼼수) Controller 내에서 redirect_to를 사용하여 임의로 다른 컨트롤러로 redirection 시키는 경우현재 request 정보를 redirect 된 페이지에서 사용하고 싶을 때 다음과 같이 flash message 등으로 전달해주면 된다. (화면에 보여지는 것을 원치 않을경우 전달받을 컨트롤러의 뷰에서 해당 flash를 display:none; 해주는 것을 잊지말 것) redirect_to post_url(@post), status: 301, flash: { fullpath: request.fullpath }

pluck can be used to query single or multiple columns from the underlying table of a model.It accepts a list of column names as argument and returns an array of values of the specified columns with the corresponding data type. Client.where(active: true).pluck(:id)# SELECT id FROM clients WHERE active = 1# => [1, 2, 3] Client.distinct.pluck(:role)# SELECT DISTINCT role FROM clients# => ['admin', ..

Rails mysql postgresql sqlite :binary blob bytea blob :boolean tinyint(1) boolean boolean :date date date date :datetime datetime timestamp datetime :decimal decimal decimal decimal :float float float float :integer int(11) integer integer :string varchar(255) * varchar(255) :text text text text :time time time datetime :timestamp datetime timestamp datetime

https://github.com/amatsuda/kaminari Gem for pagination링크로 들어가면 자세한 사용법도 나와있음 아래는 Kaminari 간단한 사용법 Gemfile에 다음을 추가 > gem 'kaminari' bundle install model에 class User < ActiveRecord::Base paginates_per 50 end controller에 @users = User.order(:name).page params[:page] view에

2.6 The has_and_belongs_to_many AssociationA has_and_belongs_to_many association creates a direct many-to-many connection with another model, with no intervening model. For example, if your application includes assemblies and parts, with each assembly having many parts and each part appearing in many assemblies, you could declare the models this way:class Assembly < ActiveRecord::Base has_and_be..