This is a small and basic shopping cart application. It is implemented by Ruby and ActiveRecord. The default databse is Sqlite3, which can be modified on environment.rb.

It has following functions:

• show all the products
• show the purchase history
• show the detailed information of the shopping cart
• add products to shopping cart
• remove products from shopping cart
• buy all the products in the shopping cart without causing the inventory be lower than 0

1. clone the file $git clone https://github.com/Eraince/shopping_cart.git
2. install the gem(specified in Gemfile) $bundle install
3. create the database and migrate $bundle exec rake db:create $bundle exec rake db:migration
4. seed the database(optional, you can check the seeds.rb file first) $bundle exec rake db:seed

We can review the tasks that we have available by running $bundle exec rake -T(specified in Rakefile); all of the tasks related to databse are provided.

$bundle exec ruby runner.rb products

View all the products with the detailed information. If you seed the database first, you should see a bunch of product.

$bundle exec ruby runner.rb history

View all the histories about purchase. You are supposed to buy something first, otherwise, the history record is empty.

$bundle exec ruby runner.rb carts

View all the products with detailed information in your shopping cart. You are supposed to add something first, otherwise, the shopping cart would be empty.

$bundle exec ruby runner.rb add 3 3

Add the product with id=3 with the amount of 3. You can change the number based on your preference. Also, it is not allowed to add the amount which is larger than the available inventory. This is to avoid the inventory go below 0. Also, if you type the id that doesn't exsit in products, it won't make any changes.

$bundle exec ruby runner.rb remove 3 1

Remove the products with the amount you provide. If it is bigger than the number in tha cart, the cart will remove the whole products directly. Also, if you type the id that doesn't exsit in your cart, it won't make any changes.

$bundle exec ruby runner.rb buy

It will check the available inventory first and buy all the products in your shopping cart. Also, if buying succesfully, it will automatically update the inventory and history.

$bundle exec ruby runner.rb help

View all the available command.

Thanks for checking my small application. Feel free to contact me at: [email protected] whenever you have questions about it. I'm happy to accept any advice.