add chat model

chat_box/migrations/0001_initial.py

@@ -0,0 +1,30 @@
+# Generated by Django 2.2.9 on 2020-01-28 05:07
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('judge', '0100_auto_20200127_0059'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Message',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('time', models.DateTimeField(auto_now_add=True, verbose_name='posted time')),
+                ('body', models.TextField(max_length=8192, verbose_name='body of comment')),
+                ('author', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='judge.Profile', verbose_name='user')),
+            ],
+            options={
+                'verbose_name': 'message',
+                'verbose_name_plural': 'messages',
+                'ordering': ('-time',),
+            },
+        ),
+    ]