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0182_set_initial_value_is_private_flag.py
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0182_set_initial_value_is_private_flag.py
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from django.db import migrations
from django.db.backends.base.schema import BaseDatabaseSchemaEditor
from django.db.migrations.state import StateApps
from django.db.models import F
def set_initial_value_of_is_private_flag(
apps: StateApps, schema_editor: BaseDatabaseSchemaEditor
) -> None:
UserMessage = apps.get_model("zerver", "UserMessage")
Message = apps.get_model("zerver", "Message")
if not Message.objects.exists():
return
i = 0
# Total is only used for the progress bar
total = Message.objects.filter(recipient__type__in=[1, 3]).count()
processed = 0
print("\nStart setting initial value for is_private flag...", flush=True)
while True:
range_end = i + 10000
# Can't use [Recipient.PERSONAL, Recipient.HUDDLE] in migration files
message_ids = list(
Message.objects.filter(recipient__type__in=[1, 3], id__gt=i, id__lte=range_end)
.values_list("id", flat=True)
.order_by("id")
)
count = UserMessage.objects.filter(message_id__in=message_ids).update(
flags=F("flags").bitor(UserMessage.flags.is_private)
)
if count == 0 and range_end >= Message.objects.last().id:
break
i = range_end
processed += len(message_ids)
if total != 0:
percent = round((processed / total) * 100, 2)
else:
percent = 100.00
print(f"Processed {processed}/{total} {percent}%", flush=True)
class Migration(migrations.Migration):
atomic = False
dependencies = [
("zerver", "0181_userprofile_change_emojiset"),
]
operations = [
migrations.RunPython(
set_initial_value_of_is_private_flag,
reverse_code=migrations.RunPython.noop,
elidable=True,
),
]