method

on

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What's this?

on(attribute) public

Returns nil, if no errors are associated with the specified attribute.
Returns the error message, if one error is associated with the specified attribute.
Returns an array of error messages, if more than one error is associated with the specified attribute.

# File activerecord/lib/active_record/validations.rb, line 99
    def on(attribute)
      if @errors[attribute.to_s].nil?
        nil
      elsif @errors[attribute.to_s].length == 1
        @errors[attribute.to_s].first
      else
        @errors[attribute.to_s]
      end
    end

August 8, 2014 - (v3.0.0 - v4.0.2)

0 thanks

Deprecated in favour of []

In Rails 3+

company.errors[:name]

In Rails 2.3 and below:

company.errors.on(:name)

on

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Deprecated in favour of []