introduce story round and participants, extend models with additional information, replace initial migration

No need for backwards compatibility at this point, so just replace the migration

stories/writingtogether/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 3.1.7 on 2021-03-30 19:23
+# Generated by Django 3.1.7 on 2021-03-30 23:08
 
 from django.conf import settings
 from django.db import migrations, models
@@ -14,12 +14,29 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
+        migrations.CreateModel(
+            name='Participant',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('order_by', models.IntegerField()),
+            ],
+        ),
         migrations.CreateModel(
             name='Story',
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('name', models.CharField(blank=True, max_length=256, null=True)),
-                ('created', models.DateTimeField()),
+                ('created', models.DateTimeField(auto_now_add=True)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='StoryRound',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=256)),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('number_of_rounds', models.IntegerField()),
+                ('participants', models.ManyToManyField(through='writingtogether.Participant', to=settings.AUTH_USER_MODEL)),
             ],
         ),
         migrations.CreateModel(
@@ -28,7 +45,28 @@ class Migration(migrations.Migration):
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('text', models.TextField()),
                 ('part_of', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='writingtogether.story')),
+                ('previous_part', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='writingtogether.storypart')),
                 ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
             ],
         ),
+        migrations.AddField(
+            model_name='story',
+            name='part_of_round',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='writingtogether.storyround'),
+        ),
+        migrations.AddField(
+            model_name='story',
+            name='started_by',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.AddField(
+            model_name='participant',
+            name='story_round',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='writingtogether.storyround'),
+        ),
+        migrations.AddField(
+            model_name='participant',
+            name='user',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
+        ),
     ]

stories/writingtogether/models.py

@@ -1,15 +1,36 @@
 from django.contrib.auth import get_user_model
 from django.db import models
 from django.db.models import CASCADE
+from django.urls import reverse
 
 User = get_user_model()
 
+
+class StoryRound(models.Model):
+    name = models.CharField(max_length=256)
+    participants = models.ManyToManyField(User, through='Participant')
+    created = models.DateTimeField(auto_now_add=True)
+    number_of_rounds = models.IntegerField()
+
+    def get_absolute_url(self):
+        return reverse('writing:detail', kwargs={'pk': self.pk})
+
+
+class Participant(models.Model):
+    user = models.ForeignKey(User, on_delete=CASCADE)
+    story_round = models.ForeignKey(StoryRound, on_delete=CASCADE)
+    order_by = models.IntegerField()
+
+
 class Story(models.Model):
     name = models.CharField(max_length=256, null=True, blank=True)
-    created = models.DateTimeField()
+    created = models.DateTimeField(auto_now_add=True)
+    part_of_round = models.ForeignKey(StoryRound, on_delete=CASCADE)
+    started_by = models.ForeignKey(User, on_delete=CASCADE)
 
 
 class StoryPart(models.Model):
     user = models.ForeignKey(User, on_delete=CASCADE)
+    previous_part = models.ForeignKey('StoryPart', on_delete=CASCADE, null=True, blank=True)
     text = models.TextField()
     part_of = models.ForeignKey('Story', on_delete=CASCADE)