Prefix length error while adding child prefixes

[JSystem1]

Issue type

[ ] Feature request
[X ] Bug report
[ ] Documentation

Environment

• Python version: 2.7
• NetBox version: 2.3.2

When trying to POST a child prefix to the following endpoint api/ipam/prefixes/(parent-prefix)/available-prefixes

You get the following error complaining about prefix length:
<pre><strong>&lt;type &#39;exceptions.KeyError&#39;&gt;</strong><br /> u&#39;prefix_length&#39;</pre>

The following is the json I am passing

{ "prefix": "ip/29", "status": { "value": 1, "label": "Active" } }

Description

[jeremystretch]

The point of the /available-prefixes/ endpoint is that it will automatically provision the next available prefix: You just have to specify the size (prefix_length) in the request. If you want to provision a specific prefix, use the /api/ipam/prefixes/ endpoint. (Also, you only need "status": 1 for the status field.)

That said, the API should return a validation error rather than an exception if prefix_length is missing from the POSTed data.