Depot app from 'Agile Web Development with Rails'

Rails
1

In the book 'Agile web development with Rails", the authors are building
a store-like app. At some point they add dynamic adding a product with
ajax call.

<!-- store_controller#index -->
<% form_remote_tag :url => { :action => 'add_to_cart', :id => product }
do %>
  <%= submit_tag "Add to Cart" %>
<% end %>
# store_controller.rb
def add_to_cart
product = Product.find(params[:id])
@cart = find_cart
@current_item = @cart.add_product(product)

# render xhr request
# model cart.rb / no DB table
def add_to_cart(product)
   current_item = @items.find {|item| item.product == product}
    if current_item
      current_item.increment_quantity
    else
      current_item = CartItem.new(product)
      @items << current_item
    end
    current_item
  end

Is there a way to add a text field which will represent the quantity of
the product to add in the cart ? Customer enter quantity in text field,
click Add to cart and the product and quantity is added to the
model/cart.

Thanks in advance

2

surely , but i warn you that that tutorial is very old, there are better
way
to do everything now.

<!-- store_controller#index -->
<% form_remote_tag :url => { :action => 'add_to_cart', :id => product }
do %>
 <%= text_field_tag :quantity%>
 <%= submit_tag "Add to Cart" %>
<% end %>
# store_controller.rb
def add_to_cart
product = Product.find(params[:id])
@cart = find_cart
@current_item = @cart.add_product(product)

# render xhr request
# model cart.rb / no DB table
def add_to_cart(product)
  current_item = @items.find {|item| item.product == product}
   if current_item
    params[:quantity].blank? ? current_item.increment_quantity :
current_item.quantity = params[:quantity]
   else
     current_item = CartItem.new(product)
     unless  params[:quantity].blank? current_item.quantity =
params[:quantity]
     @items << current_item
   end
   current_item
 end
3

forgot to add the ‘end’

 current_item = CartItem.new(product)

 unless  params[:quantity].blank?

 current_item.quantity = params[:quantity]
4

“Are you saying they aren’t using the 'better ways” of doing things in
the
latest tutorial that is in their latest book for Rails 3? (Just curious
because I’m using it as a guide for my learning as well.) "

the book for rails 3 is not out , it will be out in January 2011

http://pragprog.com/titles/rails4/agile-web-development-with-rails

5

On Sun, Sep 19, 2010 at 8:21 AM, radhames brito [email protected]
wrote:

surely , but i warn you that that tutorial {in the book 'Agile web
development with Rails"} is very old, there are better way to do everything
now.

Are you saying they aren’t using the 'better ways" of doing things in
the
latest tutorial that is in their latest book for Rails 3? (Just curious
because I’m using it as a guide for my learning as well.)

6

Yes but only if you buy it from pragmatic bookshelf ( i didnt : / ) its
UD$53, but at amazon they have it for US$29.

anyway i assumed he has the 3 edition.

7

On 19 September 2010 22:03, radhames brito [email protected] wrote:

“Are you saying they aren’t using the 'better ways” of doing things in the
latest tutorial that is in their latest book for Rails 3? (Just curious
because I’m using it as a guide for my learning as well.) "

the book for rails 3 is not out , it will be out in January 2011

http://pragprog.com/titles/rails4/agile-web-development-with-rails

The Beta version of the book is available now (as advertised on the
link you gave).

Colin