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uninitialized constant Grape::Validations::Base (NameError)が発生

Posted at

結論

grapeのバージョンv1.6.2 で grape-kaminariのバージョン0.4.1 を使うと
railsコマンド使用時にタイトルのエラーが発生する。

原因

grape-kaminari-0.4.1/lib/grape/kaminari/max_value_validator.rb
module Grape
  module Kaminari
    class MaxValueValidator < Grape::Validations::Base
      def validate_param!(attr_name, params)
        attr = params[attr_name]
        return unless attr.is_a?(Integer) && @option && attr > @option

        raise Grape::Exceptions::Validation.new(
          params: [@scope.full_name(attr_name)],
          message: "must be less than or equal #{@option}",
        )
      end
    end
  end
end

3行目の継承元が Grape::Validations::Base となっていること。

grapeのバージョンが1.5.3だと問題ないが
1.6.2だと
Grape::Validations::Validators::Base
としないといけなくなっている。

先ほどぶち当たった問題なので、急ぎ投稿しておく。

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