ProgressUpdate doesn't need its own date field

Just use the base model's created_date

bookwyrm/migrations/0012_progressupdate.py

@@ -21,7 +21,6 @@ class Migration(migrations.Migration):
                 ('remote_id', models.CharField(max_length=255, null=True)),
                 ('progress', models.IntegerField()),
                 ('mode', models.CharField(choices=[('PG', 'page'), ('PCT', 'percent')], default='PG', max_length=3)),
-                ('date', models.DateTimeField(auto_now_add=True)),
                 ('readthrough', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='bookwyrm.ReadThrough')),
                 ('user', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL)),
             ],

bookwyrm/models/status.py

@@ -339,7 +339,6 @@ class ProgressUpdate(BookWyrmModel):
     readthrough = models.ForeignKey('ReadThrough', on_delete=models.PROTECT)
     progress = models.IntegerField()
     mode = models.CharField(max_length=3, choices=ProgressMode.choices, default=ProgressMode.PAGE)
-    date = models.DateTimeField(auto_now_add=True)
 
     def save(self, *args, **kwargs):
         ''' update user active time '''

bookwyrm/templates/book.html

@@ -95,7 +95,7 @@
                     Progress Updates:
                     <dl class="progress-updates">
                         {% for progress_update in readthrough.progress_updates %}
-                        <dt>{{ progress_update.date | naturalday }}:</dt>
+                        <dt>{{ progress_update.created_date | naturalday }}:</dt>
                         <dd>{{ progress_update.progress }} of {{ book.pages }}</dd>
                         {% endfor %}
                     </dl>

bookwyrm/views.py

@@ -564,7 +564,7 @@ def book_page(request, book_id):
 
         for readthrough in readthroughs:
             readthrough.progress_updates = \
-                readthrough.progressupdate_set.all().order_by('date')
+                readthrough.progressupdate_set.all().order_by('updated_date')
 
     rating = reviews.aggregate(Avg('rating'))
     tags = models.Tag.objects.filter(