"""source.display_name — what a source is called on its platform.

#4481. A Discord source's URL is a server id and a channel id, so the
Subscriptions page could only show two numbers. The Discord ingester already
loads the server and channel names to walk them; it now keeps them here,
refreshed on every walk. NULL until a walk has read it.

Revision ID: 0115
Revises: 0114
Create Date: 2026-09-28

"""
import sqlalchemy as sa
from alembic import op

revision = "0115"
down_revision = "0114"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.add_column("source", sa.Column("display_name", sa.Text(), nullable=True))


def downgrade() -> None:
    op.drop_column("source", "display_name")