Add Revision model

akb/migrations/0006_revision.py

@@ -0,0 +1,44 @@
+# Generated by Django 3.0.8 on 2020-08-06 13:03
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('akb', '0005_tag_description'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='object',
+            name='description',
+        ),
+        migrations.RemoveField(
+            model_name='object',
+            name='simbadid',
+        ),
+        migrations.RemoveField(
+            model_name='object',
+            name='tags',
+        ),
+        migrations.CreateModel(
+            name='Revision',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('date', models.DateTimeField(auto_now_add=True)),
+                ('description', models.TextField(blank=True)),
+                ('simbadid', models.CharField(blank=True, max_length=256)),
+                ('object', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='akb.Object')),
+                ('tags', models.ManyToManyField(related_name='tagged_revisions', to='akb.Tag')),
+            ],
+            options={
+                'ordering': ['object', '-date', '-id'],
+            },
+        ),
+        migrations.AddIndex(
+            model_name='revision',
+            index=models.Index(fields=['date'], name='akb_revisio_date_a7987f_idx'),
+        ),
+    ]

akb/models.py

@@ -14,11 +14,21 @@ class Meta:
 
 class Object(models.Model):
 	oid = models.BigIntegerField(unique = True, blank = False)
-	description = models.TextField(blank = True)
-	tags = models.ManyToManyField("Tag", related_name="tagged_objects")
-	simbadid = models.CharField(max_length = 256, blank = True)
 
 	class Meta:
 		indexes = [
 			models.Index(fields=['oid']),
 		]
+
+class Revision(models.Model):
+	date = models.DateTimeField(auto_now_add = True, blank = False)
+	object = models.ForeignKey(Object, on_delete=models.PROTECT)
+	description = models.TextField(blank = True)
+	tags = models.ManyToManyField(Tag, related_name="tagged_revisions")
+	simbadid = models.CharField(max_length=256, blank=True)
+
+	class Meta:
+		indexes = [
+			models.Index(fields=['date']),
+		]
+		ordering = ['object', '-date', '-id']

akb/serializers.py

@@ -8,11 +8,17 @@ class Meta:
 		fields = ('id', 'name', 'priority', 'description')
 
 class ObjectSerializer(serializers.ModelSerializer):
+	class Meta:
+		model = models.Object
+		fields = ('id', 'oid')
+
+class RevisionSerializer(serializers.ModelSerializer):
+	object = serializers.SlugRelatedField(many=False, slug_field='oid', queryset=models.Object.objects)
 	tags = serializers.SlugRelatedField(many=True, slug_field='name', queryset=models.Tag.objects, default=[])
 
 	class Meta:
-		model = models.Object
-		fields = ('id', 'oid', 'description', 'simbadid', 'tags')
+		model = models.Revision
+		fields = ('id', 'object', 'date', 'description', 'simbadid', 'tags')
 
 class UserSerializer(serializers.ModelSerializer):
 	class Meta:

akb/urls.py

@@ -21,8 +21,10 @@
 router = DefaultRouter()
 router.register(r'tags', views.TagViewSet)
 router.register(r'objects', views.ObjectViewSet)
+router.register(r'revisions', views.RevisionViewSet)
 
 urlpatterns = [
 	url(r'^', include(router.urls)),
+	url(r'^revisions/oid/(?P<oid>\d+)/$', views.RevisionObjectViewSet.as_view(), name='revisions_oid'),
 	url(r'^whoami/$', views.whoami, name="whoami"),
 ]

akb/views.py

@@ -1,5 +1,5 @@
 from akb import models, serializers
-from rest_framework import viewsets
+from rest_framework import generics, viewsets
 from rest_framework.settings import api_settings
 from rest_framework.response import Response
 from rest_framework.decorators import api_view, permission_classes
@@ -11,10 +11,23 @@ class TagViewSet(viewsets.ModelViewSet):
 	lookup_field = 'name'
 
 class ObjectViewSet(viewsets.ModelViewSet):
-	queryset = models.Object.objects.prefetch_related('tags').all()
+	queryset = models.Object.objects
 	serializer_class = serializers.ObjectSerializer
 	lookup_field = 'oid'
 
+class RevisionViewSet(viewsets.ModelViewSet):
+	queryset = models.Revision.objects.prefetch_related('tags').prefetch_related('object').all()
+	serializer_class = serializers.RevisionSerializer
+
+class RevisionObjectViewSet(generics.ListAPIView):
+	queryset = models.Revision.objects.prefetch_related('tags').prefetch_related('object').all()
+	serializer_class = serializers.RevisionSerializer
+
+	def get_queryset(self):
+		oid = self.kwargs['oid']
+		object = models.Object.objects.get(oid=oid)
+		return models.Revision.objects.filter(object=object)
+
 @api_view(['GET'])
 @permission_classes([IsAuthenticated])
 def whoami(request):