TypeError raised when WritableNestedSerializer receives a non-integer value

[jeremystretch]

Environment

• Python version: 3.5.6
• NetBox version: 2.4.2

Steps to Reproduce

Example API request:

curl -X POST \
-H "Authorization: Token <TOKEN>" \
-H "Content-Type: application/json" \
-H "Accept: application/json; indent=4" \
http://localhost:8000/api/dcim/sites/ \
--data '{"name": "Test Site 2", "slug": "test-site-2", "region": {"name": "foo"}}'

Expected Behavior

The above request should generate a validation error, which can be handled elegantly by the client.

Observed Behavior

A TypeError exception is raised.