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ActiveRecord Validationの書き方メモ

Rails

Last updated at 2013-02-21Posted at 2012-12-26

カラムを軸とした場合のvalidationの書き方の例

validates :column,
  :presence => true,  # 必須
  :uniqueness => true, # ユニーク制約
  :uniqueness => {:scope => :column2}, # 複数カラムでのユニーク制約
  :numericality => only_integer, # 整数のみ
  :length => { :in => 10..100 },  # 長さ制約(〜以上、〜以下)
  :length => { :maximum => 100 } # 長さ制約(〜以下)
  :format => { :with => /regex/ } #正規表現マッチ

独自定義のメソッドで検証

validate :validate_example

def validate_example
  errors_add
end

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