fix migrations

mentoring/pairing/migrations/0002_auto_20210122_1621.py

@@ -0,0 +1,31 @@
+# Generated by Django 3.1.2 on 2021-01-22 16:21
+
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('participants', '0001_initial'),
+        ('pairing', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='pair',
+            name='learner',
+            field=models.ForeignKey(limit_choices_to={'role': 'L'}, on_delete=django.db.models.deletion.RESTRICT, related_name='learner_pairing', to='participants.participant'),
+        ),
+        migrations.AlterField(
+            model_name='pair',
+            name='mentor',
+            field=models.ForeignKey(limit_choices_to={'role': 'M'}, on_delete=django.db.models.deletion.RESTRICT, related_name='mentor_pairing', to='participants.participant'),
+        ),
+        migrations.AlterField(
+            model_name='pair',
+            name='start_date',
+            field=models.DateTimeField(default=django.utils.timezone.now, help_text='Date this pairing began'),
+        ),
+    ]

mentoring/pairing/models.py

@@ -5,6 +5,7 @@ from textwrap import dedent
 
 from django.conf import settings
 from django.db import models
+from django.utils import timezone
 
 from ..participants.models import Participant
 
@@ -32,7 +33,7 @@ class Pair(models.Model):
 
     start_date = models.DateTimeField(
         null=False,
-        default=lambda: datetime.datetime.now(pytz.UTC),
+        default=timezone.now,
         help_text=dedent('''Date this pairing began''')
     )