warn if pk of editable row contains chars invalid css identifiers

Author: ElLorans

flask_admin/model/widgets.py

@@ -1,3 +1,4 @@
+import re
 import typing as t
 import warnings
 
@@ -95,6 +96,14 @@ def __call__(self, field: Field, **kwargs: t.Any) -> str:
         field_name = escape(field.name)
         pk_esc = escape(pk)
 
+        if re.search(r"[^\w-]", pk_esc):
+            warnings.warn(
+                f"Primary key {str(pk)!r} contains characters that are invalid "
+                f"in CSS identifiers. Inline editing will not work for this record.",
+                UserWarning,
+                stacklevel=1,
+            )
+
         return Markup(f"""
         <span
             id="editable-{field_name}-{pk_esc}"