chore: cyndi replacement os display sort and dev data

common/peewee_model.py

@@ -6,6 +6,7 @@
 from datetime import datetime
 from enum import Enum
 
+from peewee import SQL
 from peewee import AutoField
 from peewee import BooleanField
 from peewee import CharField
@@ -16,6 +17,7 @@
 from peewee import Model
 from peewee import TextField
 from peewee import UUIDField
+from peewee import fn
 from playhouse.postgres_ext import ArrayField
 from playhouse.postgres_ext import BinaryJSONField
 
@@ -131,6 +133,23 @@ class OperatingSystem(BaseModel):
     cves_unpatched_moderate = IntegerField(null=False)
     cves_unpatched_low = IntegerField(null=False)
 
+    @classmethod
+    def display_os_format(cls):
+        """Expression for OS display string ('Name Major.Minor'), null handled as 'N/A'."""
+        # OS Name baseline
+        name_base = fn.COALESCE(cls.name, SQL("'N/A'"))
+        # Join Name and Major SPACE
+        name_major = fn.CONCAT_WS(" ", name_base, cls.major)
+        # Join result and Minor DOT
+        full_os_sql_string = fn.CONCAT_WS(".", name_major, cls.minor)
+
+        return full_os_sql_string
+
+    @classmethod
+    def sort_columns(cls):
+        """Columns for sorting by OS, first by name then by major last by minor)"""
+        return [cls.name, cls.major, cls.minor]
+
     class Meta:
         """operating_system table metadata"""