Use attachment database table

bookwyrm/migrations/0012_attachment.py

@@ -0,0 +1,28 @@
+# Generated by Django 3.0.7 on 2020-11-24 00:41
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookwyrm', '0011_auto_20201113_1727'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Attachment',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('created_date', models.DateTimeField(auto_now_add=True)),
+                ('updated_date', models.DateTimeField(auto_now=True)),
+                ('remote_id', models.CharField(max_length=255, null=True)),
+                ('image', models.ImageField(blank=True, null=True, upload_to='status/')),
+                ('status', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='items', to='bookwyrm.Status')),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]

bookwyrm/migrations/0012_status_images.py

@@ -1,19 +0,0 @@
-# Generated by Django 3.0.7 on 2020-11-23 20:44
-
-import bookwyrm.utils.fields
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('bookwyrm', '0011_auto_20201113_1727'),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name='status',
-            name='images',
-            field=bookwyrm.utils.fields.ArrayField(base_field=models.ImageField(upload_to='status/'), default=list, size=None),
-        ),
-    ]

bookwyrm/models/status.py

@@ -5,7 +5,6 @@ from django.db import models
 from model_utils.managers import InheritanceManager
 
 from bookwyrm import activitypub
-from bookwyrm.utils.fields import ArrayField
 from .base_model import ActivitypubMixin, OrderedCollectionPageMixin
 from .base_model import ActivityMapping, BookWyrmModel, PrivacyLevels
 from .base_model import tag_formatter
@@ -18,10 +17,6 @@ class Status(OrderedCollectionPageMixin, BookWyrmModel):
     mention_users = models.ManyToManyField('User', related_name='mention_user')
     mention_books = models.ManyToManyField(
         'Edition', related_name='mention_book')
-    images = ArrayField(
-        models.ImageField(upload_to='status/'),
-        default=list
-    )
     local = models.BooleanField(default=True)
     privacy = models.CharField(
         max_length=255,
@@ -150,6 +145,16 @@ class Status(OrderedCollectionPageMixin, BookWyrmModel):
         super().save(*args, **kwargs)
 
 
+class Attachment(BookWyrmModel):
+    ''' an image (or, in the future, video etc) associated with a status '''
+    status = models.ForeignKey(
+        'Status',
+        on_delete=models.CASCADE,
+        related_name='items'
+    )
+    image = models.ImageField(upload_to='status/', null=True, blank=True)
+
+
 class GeneratedNote(Status):
     ''' these are app-generated messages about user activity '''
     @property