Hi,
I have tried 1.5 but I'm still seeing the issue.
Let me firstly say that I am a beginner at (J)Ruby / Rails /
Datamapper so quite possibly this is my own fault. :-)
What I'm trying to do is get a sample app to run on Google App Engine.
When I try and add a new cartitem, the error appears in the console
and the product is always null.
I have models like this:
#cart.rb
class Cart
include DataMapper::Resource
property :id, Serial
timestamps :at
has n, :cartItems
def add_product(product)
# @cartItems = CartItem.all(:cart => self)
# if current_item.nil?
# self.cartItems.create(:product => product, :quantity => 1)
# self.save
# else
#current_item.increment_quantity
#current_item.save
self.cartItems.create(:product => product, :quantity => 1)
# self.save
# end
end
end
#cart_item.rb
class CartItem
include DataMapper::Resource
property :id, Serial
property :quantity, Integer
has 1, :product
belongs_to :cart
timestamps :at
end
#product.rb
class Product
include DataMapper::Resource
property :id, Serial
property :title, String, :required => true, :length => 500
property :description, Text, :required => true, :lazy => false
property :image_url, String, :required => true, :length => 500
property :price, BigDecimal, :scale => 2, :precision => 8
timestamps :at
belongs_to :cartItem
validates_is_unique :title
validates_with_method :price, :method => :price_must_be_at_least_a_cent
validates_format :image_url,
:with => %r{\.(gif|jpg|png)$}i,
:message => 'must be a URL for GIF, JPG ' + 'or PNG image.'
protected
def price_must_be_at_least_a_cent
if (is_a_number?(price) && price < BigDecimal.new("0.01"))
[false, "Price must be at least 0.01" ]
else
return true
end
end
def is_a_number?(s)
s.to_s.match(/\A[+-]?\d+?(\.\d+)?\Z/) == nil ? false : true
end
def self.find_products_for_sale
all(:order => [:title])
end
end
And a controller that tries to add a new item to the cart like this:
def add_to_cart
product = Product.find(params[:id])
@cart = find_cart
@cart.add_product(product)
@cart.save
end
Sorry about all the commented out sections, but I've tried a lot of
combinations of things trying to get it working.
Can you or anyone else see anything obvious I'm doing wrong?
Many thanks for your help.
Regards,
Andrew.
On 3 May 2010 08:22, Andrew Myers <[email protected]> wrote:
> Hi Charles,
>
> Thanks - I was using 1.4.0 so I'll try upgrading.
>
> Regards,
> Andrew.
>
> On 3 May 2010 03:14, Charles Oliver Nutter <[email protected]> wrote:
>> This error should no longer happen in JRuby 1.5. The "bug" isn't
>> *gone* per se, but every case of this in the wild appeared to be
>> unaffected.
>>
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