In order to be considered for the Ruby on Rails position, you must complete the task below. This challenge will demonstrate your abilities with the framework, testing, APIs, and frontend design.

Note: This task should take no longer than 1-2 hours at most to complete.

Your task is to scaffold a Ruby on Rails 4 application that can crawl for and create offers (coupons) from CJ Affiliate's API and display them in a simple view using TDD.

To begin, fork this repository.

Fork this repository and create a source directory. Within the source directory, create a new Rails 4 application. Please use SQLite as the database technology.

The Offer model should mimic the JSON data structure below:

{
"id": 9923,
"merchant_id": 2,
"title": "Kaspersky $20 off promo",
"description": "Save $20 on top Kaspersky products",
"url": "http://usa.kaspersky.com/sem/search-aff-4prod-offer",
"expires_at": "2014-02-20 00:00:00 -0800"
}

while for the Merchant model:

{
"id": 2,
"name": "Kaspersky"
}

in which an Offer belongs to a Merchant. You are free to add any additional attributes that you need.

Implement a method within the Offer model to crawl for and create offers. The API endpoint and request parameters you will be using is:

https://linksearch.api.cj.com/v2/link-search?website-id=5742006&records-per-page=20

The documentation for this endpoint can be found here. You will be provided with an API key from us. Use your best judgement to translate the API fields into Offer fields. For example, the API field promotion-end-date is probably best for expires_at. The Merchant association should be created from the API fields advertiser-name and advertiser-id. Also, crawling should be idempotent. That is, crawling the API multiple times should not create duplicate offers.

Build a simple view that can be accessed via /offers. Clicking on the "Crawl!" button should crawl and create offers and then display the offers. Please mimic the mockup below:

Unit Tests

1. It should crawl the API and create offers in the database.
2. It should be able to crawl the API multiple times and not create duplicate offers.

Integration Tests

3. It should crawl for and create offers when clicking on the button and then display them. Reloading the page should still show the offers.

Commit and push code to your forked repository and then send us a pull request with your name in the title. We'll then review your code and get back to you!