Will add an error message to each of the attributes in
attributes that is blank (using Object#blank?).
# File activemodel/lib/active_model/errors.rb, line 251
def add_on_blank(attributes, options = {})
[attributes].flatten.each do |attribute|
value = @base.send(:read_attribute_for_validation, attribute)
add(attribute, :blank, options) if value.blank?
end
end
