Hi there,
it’s an afternoon that i’m destroying my head on this, and i’ve decided
to ask to you all .
I’ve got to do some check box lists for a modified substruct version i’m
doing, right now, i’m interested to insert a list of categories of
interests into a customer sheet
i’m using the substruct plugin version, wich stays in the plugin/vendor
version.
the category.rb stays in the myapp/app/models , while the order_user.rb
stays in myapp/vendor/plugins/substruct/app/models .
this is my models
class Category < ActiveRecord::Base
has_and_belongs_to_many :order_users
end
class OrderUser < ActiveRecord::Base
include CheckboxSelectable
has_and_belongs_to_many :categories
#many other things down below
end
this are my controller
def updateCust
@customer = OrderUser.find(params[:id])
@customer.update_attributes(params[:customer])
@customer.update_check_list(params, ‘Category’)
if @customer.save
flash[:notice] = 'Customer was successfully updated.'
redirect_to :action => 'customers'
else
flash[:notice] = 'Something went wrong,please review your
data’
redirect_to :action => ‘customers’
end
end
and the view
<%= checkbox_select(‘customer’, ‘categories’, @categories, ‘name’) %>
As you can see, i’m using the Checkbox select rails plugin (
http://scoop.cheerfactory.co.uk/2007/11/05/checkbox-select-rails-plugin/
).
I’ve already tried the version in the railscast
(#17 HABTM Checkboxes - RailsCasts) but in both cases, the first time i
try to load the page, i get this error:
substruct_development.categories_order_users’ doesn’t exist: SELECT
categories.id FROM categories INNER JOIN categories_order_users
ON categories.id = categories_order_users.category_id
, so i reload and all goes fine!ad the boxes too, they appears!
but if i try to check a box and then to save a record, i get this error:
ActiveRecord::AssociationTypeMismatch in
Admin/usersController#updateCust
Category(#18224400) expected, got Category(#18557480)
or something similar, only numbers change!
Now, AssociationTypeMismatch is when you want to cope wrong types of
data together, but this is not the case 
what i’ve to do? please help me!
