Default value for required custom_fields overwrite existing data

[bdlamprecht]

Issue type

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

Environment

• Python version: 3.6.4
• NetBox version: 2.2.9

Description

I didn't do a complete test to see if this was limited only to the device model, but that is where I originally saw the error.

When doing a bulk update to devices, you are presented with the following window:

As you can see, the default value is pre-populated for the custom_fields that are required.
My example uses N/A for both template_name and template_version.

If you change any field here (platform or status or type), it will overwrite any accurate information stored in those custom_fields.

In my opinion, this is undesired outcome as most likely you won't want to have to remove the pre-populated values every time you do a bulk edit.

[bdlamprecht]

I just verified that this was not the case in v2.2.8 (default and required values for custom_fields weren't pre-populated).

[jeremystretch]

I don't think this changed in v2.2.9. It seems to happen in v2.2.8 as well, though I didn't check any further back. At any rate, this should be fixed in 594ef71. If you still have problems comment here and I'll re-open this for further investigation.