BookDataModel: add merged_into field

bookwyrm/activitypub/book.py

@@ -22,6 +22,7 @@ class BookData(ActivityObject):
     aasin: Optional[str] = None
     isfdb: Optional[str] = None
     lastEditedBy: Optional[str] = None
+    mergedInto: Optional[str] = None
 
 
 # pylint: disable=invalid-name

bookwyrm/migrations/0196_merged_into.py

@@ -0,0 +1,33 @@
+# Generated by Django 3.2.24 on 2024-02-22 09:05
+
+import bookwyrm.models.fields
+from django.db import migrations
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("bookwyrm", "0195_alter_user_preferred_language"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="author",
+            name="merged_into",
+            field=bookwyrm.models.fields.ForeignKey(
+                null=True,
+                on_delete=django.db.models.deletion.PROTECT,
+                to="bookwyrm.author",
+            ),
+        ),
+        migrations.AddField(
+            model_name="book",
+            name="merged_into",
+            field=bookwyrm.models.fields.ForeignKey(
+                null=True,
+                on_delete=django.db.models.deletion.PROTECT,
+                to="bookwyrm.book",
+            ),
+        ),
+    ]

bookwyrm/models/book.py

@@ -1,4 +1,5 @@
 """ database schema for books and shelves """
+
 from itertools import chain
 import re
 from typing import Any
@@ -71,6 +72,11 @@ class BookDataModel(ObjectMixin, BookWyrmModel):
         on_delete=models.PROTECT,
         null=True,
     )
+    merged_into = fields.ForeignKey(
+        "self",
+        on_delete=models.PROTECT,
+        null=True,
+    )
 
     @property
     def openlibrary_link(self):
@@ -190,9 +196,13 @@ class Book(BookDataModel):
         """properties of this edition, as a string"""
         items = [
             self.physical_format if hasattr(self, "physical_format") else None,
-            f"{self.languages[0]} language"
-            if self.languages and self.languages[0] and self.languages[0] != "English"
-            else None,
+            (
+                f"{self.languages[0]} language"
+                if self.languages
+                and self.languages[0]
+                and self.languages[0] != "English"
+                else None
+            ),
             str(self.published_date.year) if self.published_date else None,
             ", ".join(self.publishers) if hasattr(self, "publishers") else None,
         ]
@@ -252,6 +262,11 @@ class Work(OrderedCollectionPageMixin, Book):
             edition.save()
         return super().save(*args, **kwargs)
 
+    @property
+    def editions(self):
+        """exclude editions that have been merged"""
+        return self.editions.filter(merged_into__isnull=True)
+
     @property
     def default_edition(self):
         """in case the default edition is not set"""