working_notes~

Notes:
ON DEPOT B
class Product < ActiveRecord::Base
  # this attr_accessible seems new
  attr_accessible :description, :image_url, :price, :title
  validates :title, :description, :image_url, presence: true
  # using 0.01 because database stores 0.001 as zero any
  validates :price, numericality: {greater_than_or_equal_to: 0.01}
  validates :title, uniqueness: true
  validates :image_url, allow_blank: true, format: {
	with: %r{\.(gif|jpg|png)$}i,
	message: 'must be a URL for GIF, JPG or PNG image.'
  }
end

ON DEPOT B
unit tests output does not show which tests are run, unlike in the book 
ON DEPOT B
base name of the YAML file must match the name of database table

DEPOT D
changing the root on config/routes.rb; need to delete the defauly public/index.html

root :to => 'store#index', as: 'store' (the latter tells Rails to create a store_path variable (we saw this with say_goodbye_path)

ON DEPOT E:
view-source:http://media.pragprog.com/titles/rails4/code/rails32/depot_e/app/views/layouts/application.html.erb

application.html.erb is a layout used for all views for all controllers that don't otherwise provide a layout

ON DEPOT E:
CSS selector notation: if starts with a number sign (#) match on id attributes; if . (dot) match on class attributes, else elements name

ON DEPOT E:

one final point before we move on: both validation and functional tests will
test the behavior of controllers only; they will not retroactively affect any
objects that already exist in the database or in fixtures. In the previous example,
two products contain the same title. Such data will cause no problems
and will go undetected up to the point where such records are modified and
saved.

SCSS commments  /*added by me*/

ON DEPOT F:
if a table has foreign keys, the corresponding  model should have a belongs_to for each


side note:

new ebook uses the order in store, while the 3.0 version uses default_scope in products.rb
class StoreController < ApplicationController
  def index
	@products = Product.order(:title)
  end
end

class Product < ActiveRecord::Base
default_scope :order => 'title'


ON DEPOT g:
error on line_items_controller_test.rb, see discussion on website (http://forums.pragprog.com/forums/148/topics/10565). This is due to mass assignment problem. also, update test is different in 
generated script that on site, those in # are from site

ON DEPOT g:

line_items.find_by_product_id(product_id)

But we don’t define a method with that name. However, Active Record notices the call to an undefined method and spots that it starts with the string find_by and ends with the name of a column.
It then dynamically constructs a finder method for us, adding it to our class

E2: handling errors
deal with errors and error reporting, Rails uses structure called flash. Flash info is accessible within views
Also, can't use instance var because we have now moved on to new requests. Flash is stored in session


error logs are in development.log in the log directory


PATH vs URL
use URL for redirection

ON F1:
you can pass a collection to the method that renders partial templates

ON DEPOT L:
add remote: true for Ajax calls
 error on book: $('#cart').html("<%= j(render(@cart)) %>"); NOT $('#cart').html("<%j render @cart %>");
see http://stackoverflow.com/questions/10148134/rails-3-2-2-not-executing-rjs and http://api.rubyonrails.org/classes/ActionView/Helpers/JavaScriptHelper.html#method-i-escape_javascript

ON DEPOT M:
highlighting works, but there is an issue with border being highlighted as well. solution is 
table { border-collapse:collapse } in application.css.scss

ON DEPOT N:
coffee script works, but mouse does not change like in links

ON DEPOT O:
bunch of fixes on occured while testing using rake:test, before the ajax testing. see git's commit with comment "before Task F Ajax test"

ON before iteration G: not sure how all the Ajax works, need to pick up jQuery and CoffeeScript


ON iteration G: did migration, no failure on rake:test. will change line_item model to have order_id as accessible

aside: command for sqlite3 console is sqlite3 db/development.sqlite3 OR sqlite3 -line db/development.sqlite3
. use .exit to quit

ON DEPOT O own testing after adding form and css on order:
changed order testing "should get new"  to  LineItem.create(cart_id: cart.id, product_id: products(:ruby).id)

ON DEPOT Q bundle install will also cross-check gem dependcies. Need to restart server when doing this.


ONE DEPOT Q running a script: rails runner script/load_orders.rb

To try later: remove the \/ button when placing an order, else cart disappers. Not sure if Rails can detect which page you are on.

ON DEPOT R: function testing email
removed   <td><%= button_to 'V', decrement_line_item_path(line_item), method: :post, remote: true %></td> on _line_items.html.erb because test is complaining of some forgery
also simplified the order_notifier_test to just "Ruby Programming Language"; removed text from shipped.text.rb

ON DEPOT R: Iter I authentication
 has_secure_password in model enables validation that the passwords typed match

ON DEPOT R: form_tag = This style
of form allows us to associate values in the params structure directly with form
fields—no model object is required

ON Iter K:
problems with starting apache, no need for listen 80 or namevirtualhost on apache2.conf.some other config files must have defined it. also, i am able to bind to port 80. httpd does not seem to be a service anymore in apache2. in the future, check  sites-enabled in the /etc/apache2 folder. to restart apache2 to do this: sudo /etc/init.d/apache2 restart.
needed to add RailsEnv development to the apache config
had to change sites-enabled from 80 to 8080 to make site work