Refactor DCIM forms

netbox/dcim/forms/fields.py

@@ -0,0 +1,25 @@
+from django import forms
+from netaddr import EUI
+from netaddr.core import AddrFormatError
+
+__all__ = (
+    'MACAddressField',
+)
+
+
+class MACAddressField(forms.Field):
+    widget = forms.CharField
+    default_error_messages = {
+        'invalid': 'MAC address must be in EUI-48 format',
+    }
+
+    def to_python(self, value):
+        value = super().to_python(value)
+
+        # Validate MAC address format
+        try:
+            value = EUI(value.strip())
+        except AddrFormatError:
+            raise forms.ValidationError(self.error_messages['invalid'], code='invalid')
+
+        return value