app/models/retrospective.rb
class Retrospective < ApplicationRecord
belongs_to :sprint
validates :sprint_report, length: { maximum: 1500 }
validates :positive_points, presence: true, length: { maximum: 500 }
validates :negative_points, presence: true, length: { maximum: 500 }
validates :improvements, presence: true, length: { maximum: 500 }
end