Custom fields that contains dot in its name causes netbox to fail

[damiankaczkowski]

NetBox version

v3.0.11

Python version

3.9

Steps to Reproduce

1. Add custom field with a name "dcim.site_postcode" in content types "dcim | site".
2. Go to sites and add a site and fill "dcim.site_postcode" field with data.
3. Go to sites overview click on configure table and add "dcim.site_postcode" field to selected columns.
4. You will now spot that "dcim.site_postcode" column does not show any data. The data is only visible if you enter particular site details.
5. Also import of site data will fail with error: "Unexpected column header "cf_dcim" found."

Expected Behavior

Entered "dcim.site_postcode" data should be visible on site overview. Site data should import on site import request.

Observed Behavior

Entered "dcim.site_postcode" data is not visible on site overview. Site data won't import on site import request.

[jeremystretch]

To be clear, custom field names should not contain periods. We can implement better validation to prevent this, but the fix for this won't be to allow periods.

[damiankaczkowski]

Understood and agree. Forbidding user to input erroneous name in such field is valid behavior imo.