Details of the technical test for potential Backend engineers.

We have provided a partially complete django instance, missing some key elements such as models and views.

We would like you to add the necessary components to implement a REST API to get and set details of a blood test.

These details should include a name, unique code, unit of measurement, lower range and upper range of expected results.

On the API response, there should also be a read only field called "ideal_range" that uses the values of upper and lower to build a human readable string.

We have included a testing file in bloodtests/tests/test_bloodtests.py, this will test for some of the functionality outlined in this document and we'd like to see the tests pass once you have completed the implementation. In addition the testing file should provide some information about expected status codes/formats/model names etc, that you can use in addition to the spec below.

1. Please use Python 3.6 so make sure that is installed, we have provided a requirements.txt file to use with pip install to install all the necessary python packages for this task, please don't change the versions of any packages used.
2. Create a virtual environment, and activate it.
3. Install the necessary packages with:

pip install -r requirements.txt

5. Make your changes.

6. Django can then be run with:

python manage.py runserver

This will make available the API by default on 127.0.0.1:8000

7. Django can then be tested with:

pytest bloodtests/tests/test_bloodtests.py

Note that steps 6 and 7 will only work after you have made changes. If you run them before making changes you'll likely see errors or failed tests.

code - varchar up to 4 characters in length name - varchar up to 100 characters in length unit - varchar up to 10 characters in length lower - positive float upper - positive float lower or upper can be null but not both. If both are non null then require upper > lower.

1. The API has GET and POST methods.
2. It is to be requested with a code parameter on the url e.g. api/bloodtests/test/CHO where CHO is the code.
3. The API supports JSON.
4. The JSON output looks as follows:

{
  "ideal_range": "21.0 <= value <= 45.0",
  "code": "CHO",
  "name": "Cholesterol",
  "unit": "mmol/L",
  "lower": 21,
  "upper": 45
}

We would like you to ...

1. Implement the neccessary missing components to create this API.
2. Ensure that the testing file in bloodtests/tests/test_bloodtests.py, when run, passes all tests. Note that if you run the test file before implementing your changes it will either fail the tests or raise errors, but once you've implemented your changes the tests should alll pass.
3. Please create a repo on a hosting service like github, bitbucket and commit and push the whole project there. Including the files we provide and the ones you create/update. Please do this as you'd normally work, committing as often as you normally would etc.
4. Share this link with us so we can see what you've done and pull it down and run it.