Rails : A proper validation #rails #validation

visibility_filtering.rb

def appropriate_visibilities
    unless (self.visibilities - self.user.roles).empty?
      errors.add(:visibilities, "invalid visibilities assignment")
    end

    # Below is a bad one, change the visibilities silently. this is not a right behavior of validation
    # self[:visibilities] = BIT_MASKER.mask(
    #   # This is assuming that self.visibilities, at least, must have :regular as its member
    #   # or we will end up getting visibilities = [].
    #   # See the comment on visibilities() above
    #   self.visibilities.reject{ |role| !self.user.roles.include?(role) && role != :regular }
    # )

  end