Problem with non-ascii characters in forms: "incompatible character encodings: UTF-8 and ASCII-8BIT

Hi

First off, I’m using Ruby 1.9.1p378 and Rails 2.3.8.

I was creating a minimal application to test handling of Norwegian
special
characters when I bumped into this strange problem…

I have a simple Car model with fields maker:string and model:string.
For the controller I planned to just have an index action do all the
work:
class CarsController < ApplicationController
def index
if request.post?
@car = Car.new(params[:car])
@car.save
end
@cars = Car.find(:all)
end

def create

@car = Car.new(params[:car])

@car.save

redirect_to :action => :index

end

end

The corresponding view lists all car models and displays a form to
support
the addition of new car models:

Cars

<% @cars.each do |car| %>
maker model
<%= car.maker %> <%= car.model %> <% end %>

<% form_for(:car, :url => { :action => “index” }) do |f| %>

<%= f.label :maker %> <%= f.text_field :maker %>

<%= f.label :model %> <%= f.text_field :model %>

<%= f.submit 'Add' %>

<% end %>

Now, this works fine… until I submit special characters in one of
the
fields.
If I for example write “Dodge” and “Børnout” in the form fields, I get
an
error like this:
Encoding::CompatibilityError in Cars#index

Showing app/views/cars/index.html.erb where line #19 raised:

incompatible character encodings: UTF-8 and ASCII-8BIT

Extracted source (around line #19):

16:


17:


18: <%= f.label :model %>
19: <%= f.text_field :model %>
20:


21:


22: <%= f.submit ‘Add’ %>

But, the entry is added correctly to the database anyway, so if I just
reload http://localhost:3000/cars, I do see the new entry.
OK, I thought… I’ve read quite a few places that there have been (and
still are) various issues with support for Unicode in the different
Ruby/Rails version combinations, so I figured that I just didn’t have
the
best combination for this.
But then I temporarily built a new application by using generate
scaffold,
and it all works fine there.
After some trying and failing I discovered that if I (in my original
solution) changed the form_for :url option to :action => “create” and
added
a create action in the controller file (commented out in the above
controller source), it works with special characters and all.

So the only difference is that the form posts the data to the create
action
instead of the index action, and then it works.

I just don’t get it! :o/

Anyone has an explanation to offer?
Would be much appreciated! :o)

Kind regards,
Rolf

Hahaha!

Search the list, and you’ll notice that people have already fallen into
this trap.

Wait 'til Rails 3 AND Ruby 1.9.2 get released to jump to Rails+Ruby1.9

Stick to Rails 2.3.8 and Ruby 1.8.7 until then.

I did search the list, and I found people have similar problems with
Ruby
1.9.1, but not directly comparable to my issue.
In my simple case it DOES work, as long as I use two controller actions
instead of just the one…

Meanwhile… yes, do do stick to Ruby 1.8.7 until I know more :o)

Best regards,
Rolf

Fernando P. wrote:

Hahaha!

Search the list, and you’ll notice that people have already fallen into
this trap.

Wait 'til Rails 3 AND Ruby 1.9.2 get released to jump to Rails+Ruby1.9

Stick to Rails 2.3.8 and Ruby 1.8.7 until then.

On Sun, Aug 1, 2010 at 9:27 AM, Rolf P. [email protected] wrote:

Fernando P. wrote:

I would recommend the following setup:

Ruby 1.9.2 RC2
install => rvm install 1.9.2

Rails 3 RC
install => gem install rails --pre

MySQL 2 Adapter
install => gem install mysql2

Note: The MySQL 2 gem should resolve the MySQL encoding issues that
people
are seeing when using the regular MySQL gem and Ruby 1.9.2.

Next, if you’re planning to upgrade your application to Rails 3 and Ruby
1.9.2, I would
recommend that you begin the process now so that you can provide
feedback to
the
Rails team as well as the Ruby gem/plugin authors.

Good luck and happy coding,

-Conrad

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