similar to: Problem updating child row from parent model

line_items.yml: one: product_id: 1 cart_id: 1 quantity: 1 carts.yml: one: {} product.rb: has_many :line_items cart.rb: has_many :line_items, dependent: :destroy line_item.rb: belongs_to :product belongs_to :cart line_item_controller.rb: def destroy @line_item = LineItem.find(params[:id]) @cart = @line_item.cart @line_item.destroy respond_to do |format| format.html

What is the best way to get the running total of a number field in child records. Let say I have an Order model, which has_many :line_items, and each LineItem has an amount field. I would like to get the grand total of a specific Order. Is it a good idea to add a ''total'' column in the ''orders'' table and update it every time a line_item is

Hi, I have a real simple association setup here that''s just trying to: - Create a new PayjunctionOrder - Create some LineItem objects and assign them to the PayjunctionOrder - Save everything I''m using Rails Edge. ---- class PayjunctionOrder < ActiveRecord::Base has_many :line_items end ------------------ ---- class LineItem < ActiveRecord::Base belongs_to :order,

I''ve just started working through ''Agile'' chapter 12 ''Testing''. I''ve followed the steps carefully, setting up a fixture and unit test to check the creation of an order. When I run the test I get the following: Loaded suite test/unit/order_test Started F Finished in 0.108008 seconds. 1) Failure: test_create(OrderTest)

Hi everyone, I am relatively new to rspec and I am running into a wall in testing my views. I have a RESTful resource Contracts with a nested resource of Line_items. I am trying to figure out how to test the "edit" form of the Line_items. What complicates this is the nested routing and how to account for it, and that there is a partial form (_form.haml) that both the edit.haml and

Hello, I am trying to write a sample application. I have class LineItem< ActiveRecord::Base belongs_to : order end && class Order < ActiveRecord::Base has_one :line_item end Now in the controller i am trying : def add @ord = Order.new(params[:ord]) @ord.line_item = LineItem.new(params[:lineitem]) if @ord.save redirect_to :action => ''list'' else render

Hello, I am implementing a classic invoice application. On the create new invoice page I want to allow users to add new line items using AJAX: ----------------------------------------------------------------------------- Invoice Date [ ] Client [ ] Line Items 1. [ ] $[ ] <add new line item> <save> <cancel>

I''ve encountered a perplexing problem whilst following along the demo app in the "Agile Web Development with Rails" book. Any help would be greatly appreciated. Here is a brief time line of my tale of woe:- 0. Been programming (business apps) and designing/building DBs for two decades - but new to both Ruby and Rails (so I apologise in advance if I''ve made some

I''m having trouble with a validation that depends on an attribute of a belongs_to parent. If the child is added to an unsaved parent (parent.children << new child), the has_many collection parent.children includes the unsaved child. However the belongs_to attribute child.parent appears to be nil until the parent has been saved. Without access to the parent attributes, the validation

I''m following instructions in the Agile book, page 146 for testing an object update to the database. Here''s my code: def test_update assert_equal "jack@smiths.com", @user.email @user.email = "jack@smiths.org" assert @user.save, @user.errors.full_messages.join("; ") @user.reload assert_equal @user.email,

ciao a tutti.     come al solito, sto andando avanti a piccoli passi nel creare l''applicazione depot del libro "Sviluppare Applicazioni Web con Rails". Ora mi trovo nella fase di creazione dei test automatizzati. Ma c''è una cosa che proprio non capisco: Ho la seguente classe in ~/depot/test/unit/product_test.rb require File.dirname(__FILE__) +

Hello everyone, I''m fairly new to Rails (writing my first real app) and brand new to this mailing list. I''ve got a rails/sql error I just can''t seem to solve. It''s probably really simple, but I''m been googling and reading for a day and have made zero progress on it. Hopefully someone on this list can shine some light on my problem, or point me in the

Hello, I am exploring the "Testing" part of Rails, but It seems some things work differently than I thought it would. Consider the following model: class Client < ActiveRecord::Base has_one :project def after_create Project.new(:name => self.name, :is_client => true, :client_id => self.id).save end def after_update

What is the most elegant way to save new one-many associations? order = Order.new(:name => "My Order") order.line_items << LineItem.new(:product_id => 1, :quantity => 2) order.line_items << LineItem.new(:product_id => 2, :quantity => 5) order.save The above - which is by far the most elegant way of putting it - doesn''t work for me - the line_items

I have unit tests set up with "self.use_transactional_fixtures = true", so each test should roll back. Run individually, all my tests succeed. But running "rake test:units", I get the below error in 5 test cases. I''m not sure how to solve this since I''m not sure how to debug tasks run thru rake. Any ideas are appreciated. 1) Error: test_delete(OrderTest):

Hi all - I''m working my way through the "depot" tutorial. I''m having a problem with the section where the cart contents are displayed on the order page. The cart contents display fine after I add an item to the cart, but simply does not show up on the order page. Any help would be appreciated. I''m running Locomotive 1.0.0c on Tiger with MySQL from

I am getting an undefined method error in my cart.rb class when trying to find in an array. I cannot see what my error is. Perhaps a view more eyes can help me with this: #--------------------------------------------------------------- 1 class Cart 2 3 attr_reader :items 4 attr_reader :total_price 5 6 def initialize 7 @items = [] 8

I am trying to create unit tests for my users model but when I add a test that destroys a user, that user is not available in any of the other test. If I remove the test that destroys the user all my other tests work again. All the fixtures are suppose be reloaded between tests right? Here is my testcase : require File.dirname(__FILE__) + ''/../test_helper'' class UserTest

I am struggling with how to add dynamically add form elements to a form based on user action. Now here is my situation: I have model Project that has_many line_items On the form to create a project I initially display form elements (some drop downs and text boxes) for adding just one line_item. There is also a button or a link on the page (not sure if this should be in the main form or

In the Agile Rails tutorial I am revisiting building a cart. I have followed the steps given in the book to create the class ''Cart'' thus: class Cart attr_reader :items attr_reader :total_price def add_product(product) @items << LineItem.for_product(product) @total_price += product.price end def initialize @items = [] @total_price = 0.0 end