"""lesson_no_rule — "no rule fits" is a recorded answer (milestone 440 step 2,
#4631)

Revision ID: 0112
Revises: 0111
Create Date: 2026-10-01

One row per lesson that was judged to fall under no rule, with the reason. A
lesson with neither a confirmed link nor this row is UNJUDGED, which is what
`list_lessons(unjudged=true)` lists. CASCADE from the lesson. No backfill: no
lesson has been judged yet, and writing "no rule fits" for one nobody looked
at would assert a judgment nobody made.
"""
import sqlalchemy as sa
from alembic import op

revision = "0112"
down_revision = "0111"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "lesson_no_rule",
        sa.Column("lesson_id", sa.Integer(), sa.ForeignKey("notes.id", ondelete="CASCADE"), primary_key=True),
        sa.Column("why", sa.Text(), nullable=False),
        sa.Column("judged_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
    )


def downgrade() -> None:
    op.drop_table("lesson_no_rule")