Rails 3 Display Error Messages
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Rails Display Errors In Views
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Rails Error_messages_for
embedded form? up vote 10 down vote favorite 1 I'm new to rails & trying to set up my first embedded form. The form itself works, but I can't determine how to send validation error messages to the view. I assumed f.object.errors would provide access, but while the method is said to exist, f.object.errors.count always returns 0, and f.object.errors.any? returns false. Apart from not showing the actual error
Rails Display Validation Errors
messages, the form is working as expected - that is, failing to insert invalid data and returning to the form which failed validation. Model, controller & view listed below - any help much appreciated. ... <%= form_for([@board, @board.boardthreads.build]) do |f| %>
<%= f.text_field :title %>
Validations Active Record Callbacks Active Record Associations Active Record Query Interface Views Layouts and Rendering in Rails Action View Form Helpers Controllers rails form errors inline Action Controller Overview Rails Routing from the Outside In Digging Deeper
Rails Error Messages In View
Active Support Core Extensions Rails Internationalization API Action Mailer Basics Active Job Basics Testing Rails Applications undefined method `error_messages' Securing Rails Applications Debugging Rails Applications Configuring Rails Applications Rails Command Line Tools and Rake Tasks Asset Pipeline Working with JavaScript in Rails Autoloading and Reloading Constants Caching http://stackoverflow.com/questions/3803180/rails-3-how-to-display-error-messages-in-embedded-form with Rails: An Overview Using Rails for API-only Applications Action Cable Overview Extending Rails Rails on Rack Creating and Customizing Rails Generators Contributing to Ruby on Rails Contributing to Ruby on Rails API Documentation Guidelines Ruby on Rails Guides Guidelines Maintenance Policy Maintenance Policy Release Notes Upgrading Ruby on Rails Ruby on Rails 5.0 Release Notes http://guides.rubyonrails.org/active_record_validations.html Ruby on Rails 4.2 Release Notes Ruby on Rails 4.1 Release Notes Ruby on Rails 4.0 Release Notes Ruby on Rails 3.2 Release Notes Ruby on Rails 3.1 Release Notes Ruby on Rails 3.0 Release Notes Ruby on Rails 2.3 Release Notes Ruby on Rails 2.2 Release Notes Contribute Credits Guides Index Getting Started with Rails Active Record Basics Active Record Migrations Active Record Validations Active Record Callbacks Active Record Associations Active Record Query Interface Layouts and Rendering in Rails Action View Form Helpers Action Controller Overview Rails Routing from the Outside In Active Support Core Extensions Rails Internationalization API Action Mailer Basics Active Job Basics Testing Rails Applications Securing Rails Applications Debugging Rails Applications Configuring Rails Applications Rails Command Line Tools and Rake Tasks Asset Pipeline Working with JavaScript in Rails Autoloading and Reloading Constants Caching with Rails: An Overview Using Rails for API-only Applications Action Cable Overview Rails on Rack Creating and Customizing Rails Generators Contributing to Ruby on Rails API Documentation G
one of the first things that came out and bit me is that the error_message_on helper method, which was previously used to display error messages next to the form fields that had caused them, has been http://hibbard.eu/inline-error-messages-with-rails-3/ deprecated. It took me a little while to figure out how to reinstate this functionality. Here's how I did it. First off, we should probably note, that although this method has been removed from Rails, it is now available as a plugin named dynamic_form. This means that you could just add ‘dynamic_form' to your gem file, run bundler and everything would be the same as before. However, as Ryan Bates notes in error messages Railscast 211 (Validations in Rails 3), the reason that this and a couple of other methods (such as error_messages_for) have been removed, is that the display of error messages often needs to be customized and doing this through the old methods was a little bit cumbersome. Instead we now have access to @resource.errors which is an instance of the class ActiveModel::Errors containing all errors for a particular resource, where each key is the rails form error attribute name and the value is an array of strings with all errors. That means that we can now write: <% if @resource.errors[:field_name] %> <%= @resource.errors[:field_name][0] %> <% end %> and have our errors reappear back inline. Note, that it is necessary to write [:field_name][0], as @resource.errors[:field_name] is an array containing all available error messages and it is probably not a good idea to display all of these to your users in one go. Now, this is all a bit verbose, so it is a good idea to move this code into a helper method. def error_message_for(field, options = {:prepend_text => ""}) error_message = @resource.errors[field][0] if error_message raw "#{options[:prepend_text]} #{error_message}" end end Now you can just write: <%= error_message_for(:field_name, :prepend_text => "Whatever ") %> References: Rails 3 - show error messages next to field Rails 3 - inline errors Working with Validation Errors Tags: rails | ruby This post currently has one response Nick says: January 29, 2014 at 9:48 pm Perfect ! Exactly what i was looking for ! Comments are closed! Open external links in new tab I'm on Twitter: Follow @jchibbard Tags ajax batch files browser browser console cache canvas cd burning cookies devise dreamweaver email forms fxruby git gui programming HTML javascript jquery lightbox linux MAMP mysql php pik promise