API post new device custom_fields is and invalid keyword

[Atoms]

Issue type

[x] Bug report

Environment

• Python version: 3.4
• NetBox version: 2.1.3

Description

When using API trying to create new device with custom_fields got error:
<pre><strong>&lt;class &#39;TypeError&#39;&gt;</strong><br /> &#39;custom_fields&#39; is an invalid keyword argument for this function</pre>

Works in 2.1.2 version

[Atoms]

i think this commit introduced issue: c394985

[jeremystretch]

Could you provide the exact request you made please?

[Atoms]

the post request i'm making:
{ "tenant": "1", "platform": "8", "name": "test1", "device_type": "6", "site": "1", "device_role": "8", "custom_fields": { "ansible_groups": "xx,yyy,zzz" } }