add that

reflex/utils/compat.py

@@ -69,3 +69,21 @@ def pydantic_v1_patch():
 
 with pydantic_v1_patch():
     import sqlmodel as sqlmodel
+
+
+def sqlmodel_field_has_primary_key(field) -> bool:
+    """Determines if a field is a priamary.
+
+    Args:
+        field: a rx.model field
+
+    Returns:
+        If field is a primary key (Bool)
+    """
+    if getattr(field.field_info, "primary_key", None) is True:
+        return True
+    if getattr(field.field_info, "sa_column", None) is None:
+        return False
+    if getattr(field.field_info.sa_column, "primary_key", None) is True:
+        return True
+    return False