add blocker presets

backend/tests/test_db_migration.py

@@ -0,0 +1,85 @@
+"""Regression test for a schema-drift bug: a database created by an older
+build of the app still had a `completed_here NOT NULL` column on `tasks`
+that a later refactor dropped from the model. `create_all` never alters an
+existing table, so every task insert on such a database failed with
+
+    IntegrityError: null value in column "completed_here" ... violates
+    not-null constraint
+
+which, since task refresh runs from both the scheduler and `/api/tasks`
+endpoints, looked like "everything 500s". `app.db.init_db` now reconciles
+known-dead columns after `create_all`; this pins that behaviour down.
+"""
+
+from __future__ import annotations
+
+from sqlalchemy import text
+
+from app.db import SessionLocal, engine, init_db
+from app.models import TaskRecord
+
+
+def _simulate_pre_refactor_database() -> None:
+    """Recreate the exact drift: today's `tasks` table, plus the long-gone
+    `completed_here` column, `NOT NULL` and with no database-side default —
+    just like a database that has been running since before the column was
+    removed from the model.
+    """
+    with engine.begin() as conn:
+        conn.execute(text("DROP TABLE IF EXISTS tasks"))
+        conn.execute(
+            text(
+                """
+                CREATE TABLE tasks (
+                    id INTEGER PRIMARY KEY,
+                    source VARCHAR(32) NOT NULL,
+                    external_id VARCHAR(128) NOT NULL,
+                    title TEXT NOT NULL,
+                    description TEXT,
+                    url TEXT,
+                    project TEXT,
+                    status VARCHAR(64),
+                    priority VARCHAR(32),
+                    due_date DATE,
+                    start_date DATE,
+                    labels JSON,
+                    raw JSON,
+                    is_done BOOLEAN NOT NULL DEFAULT 0,
+                    completed_at DATETIME,
+                    completed_date DATE,
+                    completed_here BOOLEAN NOT NULL,
+                    estimated_pomodoros INTEGER,
+                    pinned BOOLEAN NOT NULL DEFAULT 0,
+                    first_seen_at DATETIME NOT NULL,
+                    last_seen_at DATETIME NOT NULL,
+                    stale BOOLEAN NOT NULL DEFAULT 0
+                )
+                """
+            )
+        )
+
+
+def test_init_db_drops_the_dead_not_null_column(session):
+    _simulate_pre_refactor_database()
+
+    init_db()
+
+    db = SessionLocal()
+    try:
+        # This is exactly what `tasks_service._upsert` + `refresh_tasks` do on
+        # a newly-seen task: insert a row without ever mentioning the column
+        # the model no longer has.
+        db.add(TaskRecord(source="jira", external_id="VPN-48", title="Renew VPN"))
+        db.commit()  # pre-fix: IntegrityError (null value in "completed_here")
+
+        stored = db.query(TaskRecord).filter_by(external_id="VPN-48").one()
+        assert stored.title == "Renew VPN"
+    finally:
+        db.close()
+
+
+def test_init_db_is_a_no_op_once_the_column_is_already_gone(session):
+    """Running it twice (every boot does) must not blow up when there is
+    nothing left to drop."""
+    init_db()
+    init_db()