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Rails よく使うメソット集

Rails

Last updated at 2014-04-15Posted at 2014-04-06

  request.request_uri
  # => "/entries"

  request.path_info
  # => "/entries"

  request.url
  # => "http://localhost:3000/entries"

  collection_select デフォルト表示
  :prompt => "デフォルト表示"

Rails 定数の呼び出し

Rails.root.to_s
=> インストールされているpath

Rails 日付や時間の取り扱い

Date.tomorrow
# => 明日
Date.yesterday
# => 昨日

console

Model.methods
# => そのModelの持っているMethod一覧を表示する。

scope

■joinしたときにwhere文
Shop.joins(:charge).where(charges: {user_id: 1})
# => SELECT `shops`.* FROM `shops` INNER JOIN `charges` ON `charges`.`shop_id` = `shops`.`id` WHERE `shops`.`deleted_at` IS NULL AND `charges`.`user_id` = 1

controller

before_filter
# => ActionMethodを呼び出す前に読み込む ActionMethod
around_filter
# => ActionMethodを呼び出す前後に読み込む ActionMethod

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