Rails app for a basic store with products, shopping cart, orders and users.

Gems:

1. Devise
2. CanCanCan
3. Carrierwave + Cloudinary

These are the steps I followed when working on this app:

1. Define data-model
2. Define screen flow

1. Product_type

• name:string

• description:text

• image:string

• has_many :products

2. Product

• name:string

• description:text

• image:string

• price:float

• belongs_to :product_type

• belongs_to :inventory

• has_many :line_items

3. Inventory

• quantity:integer

• has_many :products

4. Cart

• has_many :line_items

5. Line_item

• price (empty till checkout?)

• quantity

• belongs_to :cart

• belongs_to :product

• belongs_to :order

6. Order

• belongs_to :user

• has_many :line_items

• model method: availability_check()

7. User

• standard devise fields (email, password)

• has_one :profile

• has_many :orders

8. Profile

• name:string

• address:string

• image:string

• authorization_level

• belongs_to :user

-- Session:

• session[cart_id, user_id]

-- availability_check

• product with quantity 0 cannot be added to cart (button "AddToCart" disabled). Method in product model.
• Every time quantity in cart is changed, availability should be checked
• When you add the same product to the cart, availability should be checked

-- cart line items

• When the same product is added to cart, only the quantity should change

-- update Inventory

• git

-- cart management

• at checkout, line items are copied from cart to order
• at place order, cart is destroyed

1. Product page:

• AddToCart button on product calls method Order.add_to_cart(session, product)

  • add_to_cart method checks if a cart exist in the session.
  • If yes, it checks if the cart contains the product.
  • if no, it creates a new line item hash with product and quantity 1

  -> Entry point from wherever if cart is not empty (via some "go to cart" button)

  • Pre-populates a new order form (Orders#new) with session[cart] details

2. Order new page:

• Page has a 3 buttons: "Back to products" - "Update" - "Place order"
  • Back to products
    • just a link that re-directs you to the Products#index
  • Update
    • For now, just replaces the session[:cart] with whatever is in the form
    • And stays on the page with just a message "Cart updated"
  • Place order
    • Form data is posted to Orders table creating an order (Orders#create)
    • Takes you to Orders#show page for the newly created order

1. Homepage

• Menu with user/login
• Welcome header (image/jumbotron?)
• Thumbnail for each product_type (clickable)

2. Catalog page - one page for each product type

• Header with product type name, description and image
• Body with thumbnails for each product belonging to the type (clickable)

3. Product page - one page for each product

• Product name, description, image
• Button "Add to cart"

4. Shopping cart bar -- If not empty displayed on every page --

• List of line items with product, quantity, price, total_price_line and total_price_cart
• Button "Checkout"

5. Order

• Copy of cart with line_items
• Button "Place order" to complete flow