class CustomField < ActiveRecord::Base validates :name, presence: true, length: { maximum: 50 }, uniqueness: { scope: :organization, case_sensitive: true}, exclusion: {in: ["Assigned", "Sample name", "Sample type", "Sample group", "Added on", "Added by"]} validates :user, :organization, presence: true belongs_to :user, inverse_of: :custom_fields belongs_to :organization, inverse_of: :custom_fields belongs_to :last_modified_by, foreign_key: 'last_modified_by_id', class_name: 'User' has_many :sample_custom_fields, inverse_of: :custom_field end