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Rails – ModelのscopeとControllerのメソッドチェーンでAND検索をする例

Posted at
class User < ApplicationRecord
  scope :filter_name, ->(name) do
    return self if name.blank?
    where(name: name)
  end

  scope :filter_age, ->(age) do
    return self if age.blank?
    where(age: age)
  end
end
class UserController < ApplicationController
  def search
    users = User
              .all
              .filter_name(user_params[:name])
              .filter_age(user_params[:age])
    
    render json: { users: users }
  end

  private

  def user_params
    params.permit(:name, :age, :keyword)
  end
end

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