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Pointing out that dynamic_form plugin must be installed to be able to use error_messages and error_messages_for view helpers.

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Rodrigo Navarro 2011-02-27 10:03:50 -08:00
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railties/guides/source/active_record_validations_callbacks.textile
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@ -738,7 +738,20 @@ person.errors.size # => 0
h3. Displaying Validation Errors in the View
Rails provides built-in helpers to display the error messages of your models in your view templates.
Rails maintains an official plugin that provides helpers to display the error messages of your models in your view templates. You can install it as a plugin or as a Gem.
h4. Installing as a plugin
<shell>
$ rails plugin install git://github.com/rails/dynamic_form.git
</shell>
h4 Installing as a Gem
Add this line on your Gemfile:
<ruby>
gem "dynamic_form"
</ruby>
Now you will have access to these two methods in your view templates:
h4. +error_messages+ and +error_messages_for+