Rails3, Datamapper and select

Rails
1

Hi all,
I’m testing rails3 with Datamapper on a simple project.

I’ve 2 classes :
class Societe
include DataMapper::Resource

property :id, Serial
property :nom, String
property :adresse, Text

has n, :clients
end

class Client
include DataMapper::Resource

property :id, Serial
property :prenom, String
property :nom, String
property :telephone, String
property :courriel, String
property :adresse, Text
property :view_only, Boolean

belongs_to :societe
end

I created them using rails generate scaffold (except belongs/ has of
course).

I’ve then have in the folder “view” 5 erb templates per class, and
especially one (_form) used by “new” and “edit” templates.
In order to select the society, I have added in client’s _form a
select:

<%= form_for(@client) do |f| %>
<%= f.error_messages %>
…

<%= f.label :societe %>
<%= f.select(:societe_id, @societes.map{|s| [s.nom, s.id]}) %>
<%= f.submit %>
<% end %>

In creation mode, everything is allright and the customer is created
with the link to its society
But when I edit, I have the following error:

Showing /home/…/app/views/clients/_form.html.erb where line #30
raised:

undefined method `societe_id’ for #Client:0xa51833c

Extracted source (around line #30):

27:
28:


29: <%= f.label :societe %>

30: <%= f.select(:societe_id, @societes.map{|s| [s.nom, s.id]}) %>
31:

32:

33: <%= f.submit %>

Any idea why it’s working with empty “client” and not with existing
one?

Thanks in advance,

Sylvain