method

add_on_empty

v4.2.1 - Show latest stable - Class: ActiveModel::Errors

add_on_empty(attributes, options = {})

public

Will add an error message to each of the attributes in attributes that is empty.

person.errors.add_on_empty(:name)
person.errors.messages
# => {:name=>["can't be empty"]}

# File activemodel/lib/active_model/errors.rb, line 314
    def add_on_empty(attributes, options = {})
      Array(attributes).each do |attribute|
        value = @base.send(:read_attribute_for_validation, attribute)
        is_empty = value.respond_to?(:empty?) ? value.empty? : false
        add(attribute, :empty, options) if value.nil? || is_empty
      end
    end

add_on_empty

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