I am using this line on my index.rhtml page to capture the quantity
required of a particular item for a basic shopping cart app:
<%= text_field ''line_item'', ''quantity'',
{:size=>3} %> </td>
but my next screen (a cart screen) doesn''t reflect what was entered in
that text field when the item is added to the cart. That is,
<td><%= item.quantity %></td>
shows 0 no matter what is entered on index.rhtml (I removed the code
that was setting it to 1 in the line_item model.)
How should I pass the quantity the client wants to order to the shopping
cart?
My db table is named line_items and has an integer field named
quantity.. this is basically an exercise to extend the cart app in Agile
TIA..
--
Posted via http://www.ruby-forum.com/.
What does your code look like that populates the line items from the form data?> From: "Vince W." <vince71-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> > Reply-To: <rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org> > Date: Wed, 14 Dec 2005 23:27:08 +0100 > To: <rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org> > Subject: [Rails] Passing quantity in a shopping cart > > I am using this line on my index.rhtml page to capture the quantity > required of a particular item for a basic shopping cart app: > > <%= text_field ''line_item'', ''quantity'', {:size=>3} %> </td> > > but my next screen (a cart screen) doesn''t reflect what was entered in > that text field when the item is added to the cart. That is, > <td><%= item.quantity %></td> > > shows 0 no matter what is entered on index.rhtml (I removed the code > that was setting it to 1 in the line_item model.) > > How should I pass the quantity the client wants to order to the shopping > cart? > > My db table is named line_items and has an integer field named > quantity.. this is basically an exercise to extend the cart app in Agile > > TIA.. > > -- > Posted via http://www.ruby-forum.com/. > _______________________________________________ > Rails mailing list > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > http://lists.rubyonrails.org/mailman/listinfo/rails
Hunter''s Lists wrote:> What does your code look like that populates the line items from the > form > data?class LineItem < ActiveRecord::Base belongs_to :product belongs_to :order def self.for_product(product) item = self.new item.product = product item.unit_price = product.price item end end This is the controller for the line_item.. I couldn''t define item.quantity since quantity is already a field in the line_items table. Maybe I''ve got quantity in the wrong table? My other tables are products, orders, and users. There is also a qty_available in products but that reflects stock level and not the quantity that is being ordered. -- Posted via http://www.ruby-forum.com/.
This looks like the model, not the controller. You should have code in your controller that basically takes the stuff from the form and puts it in an instance of LineItem.> From: "Vince W." <vince71-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> > Reply-To: <rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org> > Date: Thu, 15 Dec 2005 00:42:19 +0100 > To: <rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org> > Subject: [Rails] Re: Passing quantity in a shopping cart > > Hunter''s Lists wrote: >> What does your code look like that populates the line items from the >> form >> data? > > class LineItem < ActiveRecord::Base > > belongs_to :product > belongs_to :order > def self.for_product(product) > item = self.new > item.product = product > item.unit_price = product.price > item > end > end > > > This is the controller for the line_item.. I couldn''t define > item.quantity since quantity is already a field in the line_items table. > Maybe I''ve got quantity in the wrong table? My other tables are > products, orders, and users. There is also a qty_available in products > but that reflects stock level and not the quantity that is being > ordered. > > -- > Posted via http://www.ruby-forum.com/. > _______________________________________________ > Rails mailing list > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > http://lists.rubyonrails.org/mailman/listinfo/rails
Hunter''s Lists wrote:> This looks like the model, not the controller. > > You should have code in your controller that basically takes the stuff > from > the form and puts it in an instance of LineItem.The code in my controller looks like this: def add_to_cart product = Product.find(params[:id]) @cart = find_cart @cart.add_product(product) redirect_to(:action => ''display_cart'') rescue logger.error("Attempt to access invalid product #{params[:id]}") redirect_to_index(''Invalid Product'') end Would I add a line that says @cart.add_quantity(line_item) ? -- Posted via http://www.ruby-forum.com/.
This code looks up a product based on the passed in id, finds the cart, adds the product that it found to the cart and redirects. Nowhere in this code is it pulling anything from any form (except for the id). Based on this, it seems strange that this would be fired by submitting a form. This looks like an action that would fire attached to a hyperlink on a screen listing products, to add them to your cart.> From: "Vince W." <vince71-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> > Reply-To: <rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org> > Date: Thu, 15 Dec 2005 05:18:34 +0100 > To: <rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org> > Subject: [Rails] Re: Re: Passing quantity in a shopping cart > > Hunter''s Lists wrote: >> This looks like the model, not the controller. >> >> You should have code in your controller that basically takes the stuff >> from >> the form and puts it in an instance of LineItem. > > The code in my controller looks like this: > > def add_to_cart > product = Product.find(params[:id]) > @cart = find_cart > @cart.add_product(product) > redirect_to(:action => ''display_cart'') > rescue > logger.error("Attempt to access invalid product #{params[:id]}") > redirect_to_index(''Invalid Product'') > end > > > Would I add a line that says @cart.add_quantity(line_item) ? > > -- > Posted via http://www.ruby-forum.com/. > _______________________________________________ > Rails mailing list > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org > http://lists.rubyonrails.org/mailman/listinfo/rails
Hunter''s Lists wrote:> This code looks up a product based on the passed in id, finds the cart, > adds > the product that it found to the cart and redirects. > > Nowhere in this code is it pulling anything from any form (except for > the > id). > > Based on this, it seems strange that this would be fired by submitting a > form. This looks like an action that would fire attached to a hyperlink > on a > screen listing products, to add them to your cart.Sorry but I am very new to Ruby and OO programming general. I looked up forms and it said that it could be called or just embedded like I have it in my index.rhtml file: <%= text_field ''line_item'', ''quantity'', {:size=>3} %> </td> With that, I am guessing I need to add a model to my cart.rb that defines a method for add_quantity and then call that method in my store controller at the same time I call the add_to_cart since that only adds products at this point. Does that sound right or am I way off? -- Posted via http://www.ruby-forum.com/.
Vince,
I exetended the line_item example like this:
the important thing is the qty=1 in the self.for_product definition.
when you call it you do this:
shipment <<
ShipmentItem.for_product(@product,@params[:lineitem]["quantity"])
or whatever variation works for you.
Shawn
class ShipmentItem < ActiveRecord::Base
set_table_name "transaction_items"
belongs_to :product
belongs_to :shipment, :foreign_key => "shipment_id", :dependent
=> true
acts_as_list :scope => :shipment
def self.for_product(product,qty=1)
item = self.new
item.sku = product.sku
item.quantity = qty
item.product = product
item.unit_price = product[price_field]
item.unit_price = product.price
item.recalc_subtotal
item
end
def quantity=(value)
write_attribute("quantity",value)
self.recalc_subtotal
end
def price=(value)
write_attribute("price",value)
self.recalc_subtotal
end
def recalc_subtotal
if @qty.nil? or @unit_price.nil?
write_attribute(:subtotal,0)
else
write_attribute(:subtotal,@qty * @unit_price)
end
end
end
On 12/15/05, Vince W. <vince71-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Hunter''s Lists wrote:
> > This code looks up a product based on the passed in id, finds the
cart,
> > adds
> > the product that it found to the cart and redirects.
> >
> > Nowhere in this code is it pulling anything from any form (except for
> > the
> > id).
> >
> > Based on this, it seems strange that this would be fired by submitting
a
> > form. This looks like an action that would fire attached to a
hyperlink
> > on a
> > screen listing products, to add them to your cart.
>
> Sorry but I am very new to Ruby and OO programming general. I looked up
> forms and it said that it could be called or just embedded like I have
> it in my index.rhtml file: <%= text_field ''line_item'',
''quantity'',
> {:size=>3} %> </td>
>
> With that, I am guessing I need to add a model to my cart.rb that
> defines a method for add_quantity and then call that method in my store
> controller at the same time I call the add_to_cart since that only adds
> products at this point.
>
> Does that sound right or am I way off?
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
I made a boo-boo, ignore that line that says item.unit_price product[price_field], just remove it ;) Thats a little something I''m working on for custom prices for different customer types. Shawn
Ok, so maybe I should proof read code that I''m working on before I post
it.
come on, flame me you know you want to. ;)
Corrected Code Here:
class ShipmentItem < ActiveRecord::Base
set_table_name "transaction_items"
belongs_to :product
belongs_to :shipment, :foreign_key => "shipment_id", :dependent
=> true
acts_as_list :scope => :shipment
def self.for_product(product,qty=1,price_field="price")
item = self.new
item.sku = product.sku
item.quantity = qty
item.product = product
item.unit_price = product.price
item.recalc_subtotal
item
end
def quantity=(value)
write_attribute("quantity",value)
self.recalc_subtotal
end
def price=(value)
write_attribute("unit_price",value)
self.recalc_subtotal
end
def recalc_subtotal
if @quantity.nil? or @unit_price.nil?
write_attribute(:subtotal,0)
else
write_attribute(:subtotal,@quantity * @unit_price)
end
end
end
On 12/15/05, Shawn Mathews
<stuckinrealtime-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> I made a boo-boo, ignore that line that says item.unit_price >
product[price_field], just remove it ;)
>
> Thats a little something I''m working on for custom prices for
> different customer types.
>
> Shawn
>