app/models/colony.rb
class Colony < ApplicationRecord
MAXIMUM_NAME_COLONY_LENGTH = 20
MAXIMUM_BIO_LENGTH = 512
has_many :cats
has_and_belongs_to_many :users
has_many :assignments
has_many :tasks, through: :assignments
validates :name, presence: true
validates :location, presence: true
validates :name, length: {maximum: MAXIMUM_NAME_COLONY_LENGTH}
validates :bio, length: {maximum: MAXIMUM_BIO_LENGTH}
end