Please fork this project into your personal account and commit your changes on the fork. Give us the URL of your fork, so we can review your work. Thank you!

Please consider the hints at the end of this document. This task is not about implementing a performant fibonacci algorithm, it is about productive and structured coding.

Write an API action that returns the n-th value of the fibonacci series.

POST /fibonacci.json

Parameter:

• n: [integer] n-th value of the fibonacci series

If the paramter is missing the response should have status code 400 with an appropriate error message.

The successful response should be JSON in the following structure:

{
  "value": 3,
  "result": 5,
  "runtime": 67
}

• value: the value of the parameter n
• result: the n-th value of the fibonacci series
• runtime: time in milliseconds it took to compute the result

Save the computation results on each request to the database.

The data that should be stored:

• value: value of the paramter n
• result: the n-th value of the fibonacci series
• runtime: time in milliseconds it took to compute the result
• created_at: creation datetime of the record

Write an API action that returns the last 10 computation results from the database in JSON format.

GET /fibonacci.json

Parameters: none

The successful response should be JSON in the following structure:

[
  {
    "value": 3,
    "result": 5,
    "runtime": 67,
    "created_at": "2019-01-30T12:45:56Z"
  },
  {
    "value": 10,
    "result": 55,
    "runtime": 187,
    "created_at": "2019-01-30T12:43:34Z"
  }
]

The main purpose of these tasks is to see that you know the rails stack and get a glimpse of your coding style.

You can use the docker setup to start the server with:

make server

or

make server-rebuild

if you need to rebuild the docker image.

• tackle each mission one after another
• commit at least after each mission is completed
• use libraries whenever they fit
• write passing specs!
• keep it simple and focus on the task
• don't forget the edge cases
• make sure the endpoints are actually working as expected