class Expense < ApplicationRecord
    scope :today, -> { where(created_at: Time.current.all_day) }
    scope :this_week, -> { where(created_at: Time.current.all_week) }
    scope :this_month, -> { where(created_at: Time.current.all_month) }

  validates :amount, presence: true, numericality: { greater_than_or_equal_to: 0 }
  validates :date, presence: true
end