Closes #1983: Enable regular expressions when bulk renaming device components

netbox/dcim/forms.py

@@ -58,6 +58,22 @@ class BulkRenameForm(forms.Form):
     """
     find = forms.CharField()
     replace = forms.CharField()
+    use_regex = forms.BooleanField(
+        required=False,
+        initial=True,
+        label='Use regular expressions'
+    )
+
+    def clean(self):
+
+        # Validate regular expression in "find" field
+        if self.cleaned_data['use_regex']:
+            try:
+                re.compile(self.cleaned_data['find'])
+            except re.error:
+                raise forms.ValidationError({
+                    'find': "Invalid regular expression"
+                })
 
 
 #