ycchen / data-importer

README¶ ↑

This README would normally document whatever steps are necessary to get the application up and running.

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• Ruby version

• System dependencies

• Configuration

• Database creation

• Database initialization

• How to run the test suite

• Services (job queues, cache servers, search engines, etc.)

• Deployment instructions

• …

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## Download and install

Using git to clone the repository to your local drive

# git clone github.com/ycchen/data-engineering

# cd to data-engineering folder and run bundle install

## Database setup

# rake db:migrate

## Run the webserver

# rails server

## View the webpage

# localhost:3000/

## run the test

# rake db:migrate RAILS_ENV=test

# rspec

## following steps are how I did this application

1. create purchaser model

$ rails g scaffold purchaser name:string

1. create item model

$ rails g scaffold item description:string price:float

1. create merchant model

$ rails g scaffold merchant name:string address:string

1. create sale model

$ rails g scaffold sale purchaser:references item:references merchant:references count:integer item_cost:decimal

1. use devise to create user model

$ rails g devise:install

$ rails g devise User

$ rails g devise:views

1. create import model

$ rails g scaffold import record_count:integer total_gross_revenue:decimal completed:boolean file:attachment

1. update config/routes.rb to set the root ‘importers#index’

2. rake db:migrate

3. update models/import.rb with paperclip

has_attached_file :file validates_attachment :file, :presence => true, :content_type => { :content_type => %w(image/jpeg image/jpg image/png text/tab)}, :size => { :in => 0..100.kilobytes}

1. create process_file method to parsing file, also include reqire ‘csv’ in configapplication.rb

require ‘csv’

1. create import_detail model

$ rails g scaffold import_detail purchaser_name:string merchant_name:string merchant_address:string item_description:string item_price:decimal purchase_count:integer import:references

12.

rescue_from ActiveRecord::RecordNotFound, :with => :not_found
rescue_from AbstractController::ActionNotFound, :with => :not_found
rescue_from ActionController::RoutingError, :with => :not_found

13 start testiing with rspec

$ rails g rspec:install