class SampleGroup < ActiveRecord::Base auto_strip_attributes :name, :color, nullify: false validates :name, presence: true, length: { maximum: Constants::NAME_MAX_LENGTH } validates :color, presence: true, length: { maximum: Constants::COLOR_MAX_LENGTH } validates :organization, presence: true belongs_to :created_by, foreign_key: 'created_by_id', class_name: 'User' belongs_to :last_modified_by, foreign_key: 'last_modified_by_id', class_name: 'User' belongs_to :organization, inverse_of: :sample_groups has_many :samples, inverse_of: :sample_groups end