Reduce to_learn, callable, review into one status field

migrations/versions/f1a2b3c4d5e6_status_field.py

@@ -0,0 +1,74 @@
+"""replace callable/review/to_learn with status on tune_by_instrument
+
+Revision ID: f1a2b3c4d5e6
+Revises: e5f6a2b3c4d1
+Create Date: 2026-06-09
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.sql import table, column, select
+
+revision = "f1a2b3c4d5e6"
+down_revision = "e5f6a2b3c4d1"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Add new status column
+    op.add_column(
+        "tune_by_instrument",
+        sa.Column("status", sa.String(), nullable=True),
+    )
+
+    # Migrate existing data (priority: callable > review > to_learn)
+    conn = op.get_bind()
+    tbi = table(
+        "tune_by_instrument",
+        column("id",       sa.Integer),
+        column("callable", sa.Boolean),
+        column("review",   sa.Boolean),
+        column("to_learn", sa.Boolean),
+        column("status",   sa.String),
+    )
+    rows = conn.execute(select(tbi.c.id, tbi.c.callable, tbi.c.review, tbi.c.to_learn)).fetchall()
+    for row in rows:
+        id_, callable_, review_, to_learn_ = row
+        if callable_:
+            status = "callable"
+        elif review_:
+            status = "review"
+        elif to_learn_:
+            status = "to_learn"
+        else:
+            status = None
+        if status:
+            conn.execute(tbi.update().where(tbi.c.id == id_).values(status=status))
+
+    # Drop old columns
+    op.drop_column("tune_by_instrument", "callable")
+    op.drop_column("tune_by_instrument", "review")
+    op.drop_column("tune_by_instrument", "to_learn")
+
+
+def downgrade() -> None:
+    op.add_column("tune_by_instrument", sa.Column("callable",  sa.Boolean(), nullable=True))
+    op.add_column("tune_by_instrument", sa.Column("review",    sa.Boolean(), nullable=True))
+    op.add_column("tune_by_instrument", sa.Column("to_learn",  sa.Boolean(), nullable=True))
+    conn = op.get_bind()
+    tbi = table(
+        "tune_by_instrument",
+        column("id",       sa.Integer),
+        column("callable", sa.Boolean),
+        column("review",   sa.Boolean),
+        column("to_learn", sa.Boolean),
+        column("status",   sa.String),
+    )
+    rows = conn.execute(select(tbi.c.id, tbi.c.status)).fetchall()
+    for id_, status in rows:
+        conn.execute(tbi.update().where(tbi.c.id == id_).values(
+            callable =(status == "callable"),
+            review   =(status == "review"),
+            to_learn =(status == "to_learn"),
+        ))
+    op.drop_column("tune_by_instrument", "status")