url_for_missing should be part of BrickPart, not RebrickablePart

bricktracker/part.py

@@ -2,6 +2,8 @@ import logging
 from typing import Any, Self, TYPE_CHECKING
 import traceback
 
+from flask import url_for
+
 from .exceptions import ErrorException, NotFoundException
 from .rebrickable_part import RebrickablePart
 from .sql import BrickSQL
@@ -169,3 +171,20 @@ class BrickPart(RebrickablePart):
             'part/update/missing',
             parameters=self.sql_parameters()
         )
+
+    # Compute the url for missing part
+    def url_for_missing(self, /) -> str:
+        # Different URL for a minifigure part
+        if self.minifigure is not None:
+            figure = self.minifigure.fields.figure
+        else:
+            figure = None
+
+        return url_for(
+            'set.missing_part',
+            id=self.fields.id,
+            figure=figure,
+            part=self.fields.part,
+            color=self.fields.color,
+            spare=self.fields.spare,
+        )

bricktracker/rebrickable_part.py

@@ -117,23 +117,6 @@ class RebrickablePart(BrickRecord):
             else:
                 return self.fields.image
 
-    # Compute the url for missing part
-    def url_for_missing(self, /) -> str:
-        # Different URL for a minifigure part
-        if self.minifigure is not None:
-            figure = self.minifigure.fields.figure
-        else:
-            figure = None
-
-        return url_for(
-            'set.missing_part',
-            id=self.fields.id,
-            figure=figure,
-            part=self.fields.part,
-            color=self.fields.color,
-            spare=self.fields.spare,
-        )
-
     # Compute the url for the original of the printed part
     def url_for_print(self, /) -> str:
         return url_for(