[Rails] Re: Arguments Error
I have the exact same problem. same book. same code. same error. So, how did you finally solve the problem ? Thanks Angel -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-t...@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
[Rails] Re: Arguments Error
Freddy Andersen wrote: > Where does the cart_item come from? is that in the Store controller? > post the store controller... The view has the @cart object but also > needs the cart_item.. Is that from the session? cart_item.rb is the name of a model file, the one that starts with class CartItem from above. My store_controller.rb looks like this: class StoreController < ApplicationController def index @products = Product.find_products_for_sale end def add_to_cart @cart = find_cart product = Product.find(params[:id]) @cart.add_product(product) end private def find_cart session[:cart] ||=Cart.new end end -- Posted via http://www.ruby-forum.com/. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~--~~~~--~~--~--~---
[Rails] Re: Arguments Error
Where does the cart_item come from? is that in the Store controller? post the store controller... The view has the @cart object but also needs the cart_item.. Is that from the session? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~--~~~~--~~--~--~---
[Rails] Re: Arguments Error
> a Sorry I see now I was thinking that the CartItem class was an
> activerecord class ... The issue is this:
> Here you call a new object of CartItem with a product passed
> @items << CartItem.new(product)
> But here in the initialize you do not have a argument for
> initialize...
> class CartItem
> attr_reader :product, :quantity
> def initialize
> @product = product
> @quantity = 1
> end
> Change it to this
> class CartItem
> attr_reader :product, :quantity
> def initialize( product )
> @product = product
> @quantity = 1
> end
Interesting, tried that and it's spitting a "no method for cart_item
back at me:
NameError in Store#add_to_cart
Showing app/views/store/add_to_cart.rhtml where line #4 raised:
undefined local variable or method `cart_item' for
#<#:0x26028e8>
Extracted source (around line #4):
1: The shopping cart
2:
3: <% for item in @cart.items %>
4: <%= cart_item.quantity %> × <%= h(item.title) %>
5: <% end %>
6:
RAILS_ROOT: script/../config/..
Application Trace | Framework Trace | Full Trace
#{RAILS_ROOT}/app/views/store/add_to_cart.rhtml:4:in
`_run_rhtml_47app47views47store47add_to_cart46rhtml'
#{RAILS_ROOT}/app/views/store/add_to_cart.rhtml:3:in `each'
#{RAILS_ROOT}/app/views/store/add_to_cart.rhtml:3:in
`_run_rhtml_47app47views47store47add_to_cart46rhtml'
Any idea?
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[Rails] Re: Arguments Error
Looks like you have two open posts for the same issue... Here is the answer from the other post... a Sorry I see now I was thinking that the CartItem class was an activerecord class ... The issue is this: Here you call a new object of CartItem with a product passed @items << CartItem.new(product) But here in the initialize you do not have a argument for initialize... class CartItem attr_reader :product, :quantity def initialize @product = product @quantity = 1 end Change it to this class CartItem attr_reader :product, :quantity def initialize( product ) @product = product @quantity = 1 end I would NEVER store the cartitem(add product to cart) in a session object for a ecommerce application. Yes there are things that could/ should be stored in the session but not something like adding a product to your cart... Unless you have a session replication system for your back-end which then would store the session in either the database or memcache anywho... --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~--~~~~--~~--~--~---
[Rails] Re: Arguments Error
> Probably. > > You could always add a parameter to your CartItem#initialize method. > I'm > not sure that you're heading in the direction you want to be heading, > since > it appears that CartItem is not derived from ActiveRecord::Base -- it's > not > tied to a database. > > You might want to go back and study Rail's ideas regarding models, how > they > tie to database tables, and how you can initialize them. I following along from the book DHH wrote verbatim, but it's the second edition. It was my understanding that having a database table for the cart was unnecessary because it's session data and would be avaliable based on that user? -- Posted via http://www.ruby-forum.com/. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~--~~~~--~~--~--~---
[Rails] Re: Arguments Error
> > > CartItem#initialze > > -- expects 0 arguments, you passed 1 argument in via CartItem#new > > > I'm not really sure what do do with that -- what should I change? Are > you saying only my CartItem#initialze is wrong? > Probably. You could always add a parameter to your CartItem#initialize method. I'm not sure that you're heading in the direction you want to be heading, since it appears that CartItem is not derived from ActiveRecord::Base -- it's not tied to a database. You might want to go back and study Rail's ideas regarding models, how they tie to database tables, and how you can initialize them. --wpd --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~--~~~~--~~--~--~---
[Rails] Re: Arguments Error
> StoreController#add_to_cart > -- doesn't expect any methods, but this is called by the Rails framework > as > an action, and Rails doesn't pass any arguments to the action methods > Cart#add_product > -- expects 1 argument, you're calling it with 1 argument in > StoreController#add_to_cart > CartItem#new > -- calls CartItem#initialize with however many arguments it was passed > -- is called with 1 argument in Cart#add_product > CartItem#initialze > -- expects 0 arguments, you passed 1 argument in via CartItem#new I'm not really sure what do do with that -- what should I change? Are you saying only my CartItem#initialze is wrong? -- Posted via http://www.ruby-forum.com/. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~--~~~~--~~--~--~---
[Rails] Re: Arguments Error
Your error message is: wrong number of arguments (1 for 0) That means that somewhere, you are calling a method that doesn't expect any arguments and you are passing an argument to it. The stack trace give you a clue: ArgumentError in StoreController#add_to_cart app/models/cart.rb:13:in `initialize' app/models/cart.rb:13:in `new' app/models/cart.rb:13:in `add_product' app/controllers/store_controller.rb:10:in `add_to_cart' One of the methods listed (#add_to_cart, #initialize, #new, or #add_product) is being called with an argument where it wasn't expecting one. StoreController#add_to_cart -- doesn't expect any methods, but this is called by the Rails framework as an action, and Rails doesn't pass any arguments to the action methods Cart#add_product -- expects 1 argument, you're calling it with 1 argument in StoreController#add_to_cart CartItem#new -- calls CartItem#initialize with however many arguments it was passed -- is called with 1 argument in Cart#add_product CartItem#initialze -- expects 0 arguments, you passed 1 argument in via CartItem#new --wpd --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~--~~~~--~~--~--~---
[Rails] Re: Arguments Error
Also, my add_to_cart.rhtml view looks like this: The shopping cart <% for item in @cart.items %> <%= cart_item.quantity %> × <%= h(item.title) %> <% end %> -- Posted via http://www.ruby-forum.com/. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~--~~~~--~~--~--~---
