Update progress with comments

bookwyrm/models/status.py

@@ -14,6 +14,7 @@ from .activitypub_mixin import ActivitypubMixin, ActivityMixin
 from .activitypub_mixin import OrderedCollectionPageMixin
 from .base_model import BookWyrmModel
 from .fields import image_serializer
+from .readthrough import ProgressMode
 from . import fields
 
 
@@ -229,6 +230,13 @@ class Comment(Status):
         "Edition", on_delete=models.PROTECT, activitypub_field="inReplyToBook"
     )
 
+    # this is it's own field instead of a foreign key to the progress update
+    # so that the update can be deleted without impacting the status
+    progress = models.IntegerField(validators=[MinValueValidator(0)], null=True, blank=True)
+    mode = models.CharField(
+        max_length=3, choices=ProgressMode.choices, default=ProgressMode.PAGE, null=True, blank=True
+    )
+
     @property
     def pure_content(self):
         """ indicate the book in question for mastodon (or w/e) users """