Add a data migration to populate Member.role

hc/accounts/migrations/0041_fill_role.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.2.4 on 2021-07-22 13:25
+
+from django.db import migrations
+
+
+def fill_member_role(apps, schema_editor):
+    Member = apps.get_model("accounts", "Member")
+    Member.objects.filter(rw=False).update(role="r")
+    Member.objects.filter(rw=True).update(role="w")
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("accounts", "0040_auto_20210722_1244"),
+    ]
+
+    operations = [
+        migrations.RunPython(fill_member_role, migrations.RunPython.noop),
+    ]

hc/accounts/models.py

@@ -428,9 +428,7 @@ class Member(models.Model):
     project = models.ForeignKey(Project, models.CASCADE)
     transfer_request_date = models.DateTimeField(null=True, blank=True)
     rw = models.BooleanField(default=True, null=True)
-    role = models.CharField(
-        max_length=1, default=Role.REGULAR, choices=Role.choices, blank=True, null=True
-    )
+    role = models.CharField(max_length=1, default=Role.REGULAR, choices=Role.choices)
 
     class Meta:
         constraints = [