From 8513e2fdc82bfe37191c81ec4cefe47ddbfe90d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sybren=20A=2E=20St=C3=BCvel?= <sybren@blender.org>
Date: Thu, 26 Sep 2024 22:38:17 +0200
Subject: [PATCH] Manager: replace GORM 'now' function with our own
 implementation

GORM implicitly sets 'created at', 'updated at' and 'deleted at' timestamps
to 'now' by calling a 'now function'. This is now implemented by Flamenco
directly, instead of relying on GORM.

Ref: #104305
---
 internal/manager/persistence/db.go            | 42 ++++++++++---------
 internal/manager/persistence/jobs.go          | 28 ++++++-------
 .../manager/persistence/jobs_blocklist.go     |  2 +-
 internal/manager/persistence/jobs_test.go     | 26 ++++++------
 internal/manager/persistence/last_rendered.go |  2 +-
 .../manager/persistence/task_scheduler.go     |  2 +-
 .../persistence/task_scheduler_test.go        |  4 +-
 internal/manager/persistence/test_support.go  |  1 -
 internal/manager/persistence/timeout_test.go  |  2 +-
 .../persistence/worker_sleep_schedule.go      |  6 +--
 .../persistence/worker_sleep_schedule_test.go |  4 +-
 internal/manager/persistence/worker_tag.go    |  4 +-
 internal/manager/persistence/workers.go       | 10 ++---
 internal/manager/persistence/workers_test.go  |  2 +-
 14 files changed, 69 insertions(+), 66 deletions(-)

diff --git a/internal/manager/persistence/db.go b/internal/manager/persistence/db.go
index 2cd34262..6ba0048f 100644
--- a/internal/manager/persistence/db.go
+++ b/internal/manager/persistence/db.go
@@ -18,7 +18,8 @@ import (
 
 // DB provides the database interface.
 type DB struct {
-	gormDB *gorm.DB
+	gormDB  *gorm.DB
+	nowfunc func() time.Time
 
 	// See PeriodicIntegrityCheck().
 	consistencyCheckRequests chan struct{}
@@ -88,22 +89,15 @@ func openDB(ctx context.Context, dsn string) (*DB, error) {
 	dblogger := NewDBLogger(log.Level(globalLogLevel))
 
 	config := gorm.Config{
-		Logger:  dblogger,
-		NowFunc: nowFunc,
+		Logger: dblogger,
 	}
 
 	return openDBWithConfig(dsn, &config)
 }
 
 func openDBWithConfig(dsn string, config *gorm.Config) (*DB, error) {
-	dialector := sqlite.Open(dsn)
-	gormDB, err := gorm.Open(dialector, config)
-	if err != nil {
-		return nil, err
-	}
-
 	db := DB{
-		gormDB: gormDB,
+		nowfunc: time.Now,
 
 		// Buffer one request, so that even when a consistency check is already
 		// running, another can be queued without blocking. Queueing more than one
@@ -111,6 +105,15 @@ func openDBWithConfig(dsn string, config *gorm.Config) (*DB, error) {
 		consistencyCheckRequests: make(chan struct{}, 1),
 	}
 
+	config.NowFunc = db.now
+
+	dialector := sqlite.Open(dsn)
+	gormDB, err := gorm.Open(dialector, config)
+	if err != nil {
+		return nil, err
+	}
+	db.gormDB = gormDB
+
 	// Close the database connection if there was some error. This prevents
 	// leaking database connections & should remove any write-ahead-log files.
 	closeConnOnReturn := true
@@ -155,12 +158,6 @@ func openDBWithConfig(dsn string, config *gorm.Config) (*DB, error) {
 	return &db, nil
 }
 
-// nowFunc returns 'now' in UTC, so that GORM-managed times (createdAt,
-// deletedAt, updatedAt) are stored in UTC.
-func nowFunc() time.Time {
-	return time.Now().UTC()
-}
-
 // vacuum executes the SQL "VACUUM" command, and logs any errors.
 func (db *DB) vacuum() {
 	tx := db.gormDB.Exec("vacuum")
@@ -231,10 +228,17 @@ func (db *DB) queriesWithTX() (*queriesTX, error) {
 	return &qtx, nil
 }
 
-// now returns the result of `nowFunc()` wrapped in a sql.NullTime.
-func (db *DB) now() sql.NullTime {
+// now returns 'now' as reported by db.nowfunc.
+// It always converts the timestamp to UTC.
+func (db *DB) now() time.Time {
+	return db.nowfunc().UTC()
+}
+
+// nowNullable returns the result of `now()` wrapped in a sql.NullTime.
+// It is nullable just for ease of use, it will never actually be null.
+func (db *DB) nowNullable() sql.NullTime {
 	return sql.NullTime{
-		Time:  db.gormDB.NowFunc(),
+		Time:  db.now(),
 		Valid: true,
 	}
 }
diff --git a/internal/manager/persistence/jobs.go b/internal/manager/persistence/jobs.go
index 7c74adc7..a6851c41 100644
--- a/internal/manager/persistence/jobs.go
+++ b/internal/manager/persistence/jobs.go
@@ -167,7 +167,7 @@ func (db *DB) StoreAuthoredJob(ctx context.Context, authoredJob job_compilers.Au
 
 	// Create the job itself.
 	params := sqlc.CreateJobParams{
-		CreatedAt:               db.gormDB.NowFunc(),
+		CreatedAt:               db.now(),
 		UUID:                    authoredJob.JobID,
 		Name:                    authoredJob.Name,
 		JobType:                 authoredJob.JobType,
@@ -246,7 +246,7 @@ func (db *DB) storeAuthoredJobTaks(
 	}
 
 	// Give every task the same creation timestamp.
-	now := db.gormDB.NowFunc()
+	now := db.now()
 
 	uuidToTask := make(map[string]TaskInfo)
 	for _, authoredTask := range authoredJob.Tasks {
@@ -442,7 +442,7 @@ func (db *DB) RequestJobDeletion(ctx context.Context, j *Job) error {
 	queries := db.queries()
 
 	// Update the given job itself, so we don't have to re-fetch it from the database.
-	j.DeleteRequestedAt = db.now()
+	j.DeleteRequestedAt = db.nowNullable()
 
 	params := sqlc.RequestJobDeletionParams{
 		Now:   j.DeleteRequestedAt,
@@ -479,7 +479,7 @@ func (db *DB) RequestJobMassDeletion(ctx context.Context, lastUpdatedMax time.Ti
 
 	// Update the selected jobs.
 	params := sqlc.RequestMassJobDeletionParams{
-		Now:   db.now(),
+		Now:   db.nowNullable(),
 		UUIDs: uuids,
 	}
 	if err := queries.RequestMassJobDeletion(ctx, params); err != nil {
@@ -529,7 +529,7 @@ func (db *DB) SaveJobStatus(ctx context.Context, j *Job) error {
 	queries := db.queries()
 
 	params := sqlc.SaveJobStatusParams{
-		Now:      db.now(),
+		Now:      db.nowNullable(),
 		ID:       int64(j.ID),
 		Status:   string(j.Status),
 		Activity: j.Activity,
@@ -547,7 +547,7 @@ func (db *DB) SaveJobPriority(ctx context.Context, j *Job) error {
 	queries := db.queries()
 
 	params := sqlc.SaveJobPriorityParams{
-		Now:      db.now(),
+		Now:      db.nowNullable(),
 		ID:       int64(j.ID),
 		Priority: int64(j.Priority),
 	}
@@ -670,7 +670,7 @@ func (db *DB) SaveTask(ctx context.Context, t *Task) error {
 	}
 
 	param := sqlc.UpdateTaskParams{
-		UpdatedAt: db.now(),
+		UpdatedAt: db.nowNullable(),
 		Name:      t.Name,
 		Type:      t.Type,
 		Priority:  int64(t.Priority),
@@ -709,7 +709,7 @@ func (db *DB) SaveTaskStatus(ctx context.Context, t *Task) error {
 	queries := db.queries()
 
 	err := queries.UpdateTaskStatus(ctx, sqlc.UpdateTaskStatusParams{
-		UpdatedAt: db.now(),
+		UpdatedAt: db.nowNullable(),
 		Status:    string(t.Status),
 		ID:        int64(t.ID),
 	})
@@ -723,7 +723,7 @@ func (db *DB) SaveTaskActivity(ctx context.Context, t *Task) error {
 	queries := db.queries()
 
 	err := queries.UpdateTaskActivity(ctx, sqlc.UpdateTaskActivityParams{
-		UpdatedAt: db.now(),
+		UpdatedAt: db.nowNullable(),
 		Activity:  t.Activity,
 		ID:        int64(t.ID),
 	})
@@ -740,7 +740,7 @@ func (db *DB) TaskAssignToWorker(ctx context.Context, t *Task, w *Worker) error
 	queries := db.queries()
 
 	err := queries.TaskAssignToWorker(ctx, sqlc.TaskAssignToWorkerParams{
-		UpdatedAt: db.now(),
+		UpdatedAt: db.nowNullable(),
 		WorkerID: sql.NullInt64{
 			Int64: int64(w.ID),
 			Valid: true,
@@ -935,7 +935,7 @@ func (db *DB) UpdateJobsTaskStatuses(ctx context.Context, job *Job,
 	queries := db.queries()
 
 	err := queries.UpdateJobsTaskStatuses(ctx, sqlc.UpdateJobsTaskStatusesParams{
-		UpdatedAt: db.now(),
+		UpdatedAt: db.nowNullable(),
 		Status:    string(taskStatus),
 		Activity:  activity,
 		JobID:     int64(job.ID),
@@ -959,7 +959,7 @@ func (db *DB) UpdateJobsTaskStatusesConditional(ctx context.Context, job *Job,
 	queries := db.queries()
 
 	err := queries.UpdateJobsTaskStatusesConditional(ctx, sqlc.UpdateJobsTaskStatusesConditionalParams{
-		UpdatedAt:        db.now(),
+		UpdatedAt:        db.nowNullable(),
 		Status:           string(taskStatus),
 		Activity:         activity,
 		JobID:            int64(job.ID),
@@ -976,7 +976,7 @@ func (db *DB) UpdateJobsTaskStatusesConditional(ctx context.Context, job *Job,
 func (db *DB) TaskTouchedByWorker(ctx context.Context, t *Task) error {
 	queries := db.queries()
 
-	now := db.now()
+	now := db.nowNullable()
 	err := queries.TaskTouchedByWorker(ctx, sqlc.TaskTouchedByWorkerParams{
 		UpdatedAt:     now,
 		LastTouchedAt: now,
@@ -1004,7 +1004,7 @@ func (db *DB) AddWorkerToTaskFailedList(ctx context.Context, t *Task, w *Worker)
 	queries := db.queries()
 
 	err = queries.AddWorkerToTaskFailedList(ctx, sqlc.AddWorkerToTaskFailedListParams{
-		CreatedAt: db.now().Time,
+		CreatedAt: db.nowNullable().Time,
 		TaskID:    int64(t.ID),
 		WorkerID:  int64(w.ID),
 	})
diff --git a/internal/manager/persistence/jobs_blocklist.go b/internal/manager/persistence/jobs_blocklist.go
index 444022a0..925e6c02 100644
--- a/internal/manager/persistence/jobs_blocklist.go
+++ b/internal/manager/persistence/jobs_blocklist.go
@@ -41,7 +41,7 @@ func (db *DB) AddWorkerToJobBlocklist(ctx context.Context, job *Job, worker *Wor
 	queries := db.queries()
 
 	return queries.AddWorkerToJobBlocklist(ctx, sqlc.AddWorkerToJobBlocklistParams{
-		CreatedAt: db.now().Time,
+		CreatedAt: db.nowNullable().Time,
 		JobID:     int64(job.ID),
 		WorkerID:  int64(worker.ID),
 		TaskType:  taskType,
diff --git a/internal/manager/persistence/jobs_test.go b/internal/manager/persistence/jobs_test.go
index 389b9554..b81fd05b 100644
--- a/internal/manager/persistence/jobs_test.go
+++ b/internal/manager/persistence/jobs_test.go
@@ -125,7 +125,7 @@ func TestSaveJobStorageInfo(t *testing.T) {
 
 	startTime := time.Date(2023, time.February, 7, 15, 0, 0, 0, time.UTC)
 	mockNow := startTime
-	db.gormDB.NowFunc = func() time.Time { return mockNow }
+	db.nowfunc = func() time.Time { return mockNow }
 
 	authoredJob := createTestAuthoredJobWithTasks()
 	err := db.StoreAuthoredJob(ctx, authoredJob)
@@ -269,8 +269,8 @@ func TestRequestJobDeletion(t *testing.T) {
 	authoredJob2 := duplicateJobAndTasks(authoredJob1)
 	persistAuthoredJob(t, ctx, db, authoredJob2)
 
-	mockNow := time.Now()
-	db.gormDB.NowFunc = func() time.Time { return mockNow }
+	mockNow := time.Now().UTC()
+	db.nowfunc = func() time.Time { return mockNow }
 
 	err := db.RequestJobDeletion(ctx, job1)
 	require.NoError(t, err)
@@ -297,28 +297,28 @@ func TestRequestJobMassDeletion(t *testing.T) {
 	defer close()
 
 	origGormNow := db.gormDB.NowFunc
-	now := db.gormDB.NowFunc()
+	now := db.now()
 
 	// Ensure different jobs get different timestamps.
-	db.gormDB.NowFunc = func() time.Time { return now.Add(-3 * time.Second) }
+	db.nowfunc = func() time.Time { return now.Add(-3 * time.Second) }
 	authoredJob2 := duplicateJobAndTasks(authoredJob1)
 	job2 := persistAuthoredJob(t, ctx, db, authoredJob2)
 
-	db.gormDB.NowFunc = func() time.Time { return now.Add(-4 * time.Second) }
+	db.nowfunc = func() time.Time { return now.Add(-4 * time.Second) }
 	authoredJob3 := duplicateJobAndTasks(authoredJob1)
 	job3 := persistAuthoredJob(t, ctx, db, authoredJob3)
 
-	db.gormDB.NowFunc = func() time.Time { return now.Add(-5 * time.Second) }
+	db.nowfunc = func() time.Time { return now.Add(-5 * time.Second) }
 	authoredJob4 := duplicateJobAndTasks(authoredJob1)
 	job4 := persistAuthoredJob(t, ctx, db, authoredJob4)
 
 	// Request that "job3 and older" gets deleted.
 	timeOfDeleteRequest := origGormNow()
-	db.gormDB.NowFunc = func() time.Time { return timeOfDeleteRequest }
+	db.nowfunc = func() time.Time { return timeOfDeleteRequest }
 	uuids, err := db.RequestJobMassDeletion(ctx, job3.UpdatedAt)
 	require.NoError(t, err)
 
-	db.gormDB.NowFunc = origGormNow
+	db.nowfunc = origGormNow
 
 	// Only jobs 3 and 4 should be updated.
 	assert.Equal(t, []string{job3.UUID, job4.UUID}, uuids)
@@ -348,7 +348,7 @@ func TestRequestJobMassDeletion_noJobsFound(t *testing.T) {
 	defer close()
 
 	// Request deletion with a timestamp that doesn't match any jobs.
-	now := db.gormDB.NowFunc()
+	now := db.now()
 	uuids, err := db.RequestJobMassDeletion(ctx, now.Add(-24*time.Hour))
 	assert.ErrorIs(t, err, ErrJobNotFound)
 	assert.Zero(t, uuids)
@@ -364,7 +364,7 @@ func TestFetchJobsDeletionRequested(t *testing.T) {
 	defer close()
 
 	now := time.Now()
-	db.gormDB.NowFunc = func() time.Time { return now }
+	db.nowfunc = func() time.Time { return now }
 
 	authoredJob2 := duplicateJobAndTasks(authoredJob1)
 	job2 := persistAuthoredJob(t, ctx, db, authoredJob2)
@@ -382,7 +382,7 @@ func TestFetchJobsDeletionRequested(t *testing.T) {
 		now.Add(-5 * time.Second),
 	}
 	currentTimestampIndex := 0
-	db.gormDB.NowFunc = func() time.Time {
+	db.nowfunc = func() time.Time {
 		now := timestamps[currentTimestampIndex]
 		currentTimestampIndex++
 		return now
@@ -688,7 +688,7 @@ func TestTaskTouchedByWorker(t *testing.T) {
 	require.NoError(t, err)
 	assert.True(t, task.LastTouchedAt.IsZero())
 
-	now := db.gormDB.NowFunc()
+	now := db.now()
 	err = db.TaskTouchedByWorker(ctx, task)
 	require.NoError(t, err)
 
diff --git a/internal/manager/persistence/last_rendered.go b/internal/manager/persistence/last_rendered.go
index a5ec02aa..37238340 100644
--- a/internal/manager/persistence/last_rendered.go
+++ b/internal/manager/persistence/last_rendered.go
@@ -23,7 +23,7 @@ type LastRendered struct {
 func (db *DB) SetLastRendered(ctx context.Context, j *Job) error {
 	queries := db.queries()
 
-	now := db.now()
+	now := db.nowNullable()
 	return queries.SetLastRendered(ctx, sqlc.SetLastRenderedParams{
 		CreatedAt: now.Time,
 		UpdatedAt: now,
diff --git a/internal/manager/persistence/task_scheduler.go b/internal/manager/persistence/task_scheduler.go
index 0c16d350..9d5539b5 100644
--- a/internal/manager/persistence/task_scheduler.go
+++ b/internal/manager/persistence/task_scheduler.go
@@ -109,7 +109,7 @@ func (db *DB) scheduleTask(ctx context.Context, queries *sqlc.Queries, w *Worker
 	// Assign the task to the worker.
 	err = queries.AssignTaskToWorker(ctx, sqlc.AssignTaskToWorkerParams{
 		WorkerID: workerID,
-		Now:      db.now(),
+		Now:      db.nowNullable(),
 		TaskID:   task.ID,
 	})
 
diff --git a/internal/manager/persistence/task_scheduler_test.go b/internal/manager/persistence/task_scheduler_test.go
index 81c5ea70..381f7888 100644
--- a/internal/manager/persistence/task_scheduler_test.go
+++ b/internal/manager/persistence/task_scheduler_test.go
@@ -51,7 +51,7 @@ func TestOneJobOneTask(t *testing.T) {
 	assert.Equal(t, w.ID, *task.WorkerID, "task must be assigned to the requesting worker")
 
 	// Check the task in the database.
-	now := db.gormDB.NowFunc()
+	now := db.now()
 	dbTask, err := db.FetchTask(context.Background(), authTask.UUID)
 	require.NoError(t, err)
 	require.NotNil(t, dbTask)
@@ -530,7 +530,7 @@ func windowsWorker(t *testing.T, db *DB) Worker {
 
 func saveTestWorker(t *testing.T, db *DB, worker *Worker) {
 	params := sqlc.CreateWorkerParams{
-		CreatedAt:          db.gormDB.NowFunc(),
+		CreatedAt:          db.now(),
 		UUID:               worker.UUID,
 		Secret:             worker.Secret,
 		Name:               worker.Name,
diff --git a/internal/manager/persistence/test_support.go b/internal/manager/persistence/test_support.go
index 589b3c07..3e0388b2 100644
--- a/internal/manager/persistence/test_support.go
+++ b/internal/manager/persistence/test_support.go
@@ -45,7 +45,6 @@ func CreateTestDB() (db *DB, closer func()) {
 	config := gorm.Config{
 		Logger:   dblogger,
 		ConnPool: sqliteConn,
-		NowFunc:  nowFunc,
 	}
 
 	db, err = openDBWithConfig(TestDSN, &config)
diff --git a/internal/manager/persistence/timeout_test.go b/internal/manager/persistence/timeout_test.go
index 364f4613..30ad05c7 100644
--- a/internal/manager/persistence/timeout_test.go
+++ b/internal/manager/persistence/timeout_test.go
@@ -18,7 +18,7 @@ func TestFetchTimedOutTasks(t *testing.T) {
 	tasks, err := db.FetchTasksOfJob(ctx, job)
 	require.NoError(t, err)
 
-	now := db.gormDB.NowFunc()
+	now := db.now()
 	deadline := now.Add(-5 * time.Minute)
 
 	// Mark the task as last touched before the deadline, i.e. old enough for a timeout.
diff --git a/internal/manager/persistence/worker_sleep_schedule.go b/internal/manager/persistence/worker_sleep_schedule.go
index 916c19c0..34ebe0a5 100644
--- a/internal/manager/persistence/worker_sleep_schedule.go
+++ b/internal/manager/persistence/worker_sleep_schedule.go
@@ -70,8 +70,8 @@ func (db *DB) SetWorkerSleepSchedule(ctx context.Context, workerUUID string, sch
 
 	queries := db.queries()
 	params := sqlc.SetWorkerSleepScheduleParams{
-		CreatedAt:  db.gormDB.NowFunc(),
-		UpdatedAt:  db.now(),
+		CreatedAt:  db.now(),
+		UpdatedAt:  db.nowNullable(),
 		WorkerID:   int64(schedule.WorkerID),
 		IsActive:   schedule.IsActive,
 		DaysOfWeek: schedule.DaysOfWeek,
@@ -126,7 +126,7 @@ func (db *DB) FetchSleepScheduleWorker(ctx context.Context, schedule *SleepSched
 
 // FetchSleepSchedulesToCheck returns the sleep schedules that are due for a check.
 func (db *DB) FetchSleepSchedulesToCheck(ctx context.Context) ([]*SleepSchedule, error) {
-	now := db.now()
+	now := db.nowNullable()
 
 	log.Debug().
 		Str("timeout", now.Time.String()).
diff --git a/internal/manager/persistence/worker_sleep_schedule_test.go b/internal/manager/persistence/worker_sleep_schedule_test.go
index b35f1232..b529b4e2 100644
--- a/internal/manager/persistence/worker_sleep_schedule_test.go
+++ b/internal/manager/persistence/worker_sleep_schedule_test.go
@@ -204,7 +204,7 @@ func TestSetWorkerSleepScheduleNextCheck(t *testing.T) {
 	err := db.SetWorkerSleepSchedule(ctx, w.UUID, &schedule)
 	require.NoError(t, err)
 
-	future := db.gormDB.NowFunc().Add(5 * time.Hour)
+	future := db.now().Add(5 * time.Hour)
 	schedule.NextCheck = future
 
 	err = db.SetWorkerSleepScheduleNextCheck(ctx, &schedule)
@@ -223,7 +223,7 @@ func TestFetchSleepSchedulesToCheck(t *testing.T) {
 	mockedPast := mockedNow.Add(-10 * time.Second)
 	mockedFuture := mockedNow.Add(10 * time.Second)
 
-	db.gormDB.NowFunc = func() time.Time { return mockedNow }
+	db.nowfunc = func() time.Time { return mockedNow }
 
 	schedule0 := SleepSchedule{ // Next check in the past -> should be checked.
 		Worker: &Worker{
diff --git a/internal/manager/persistence/worker_tag.go b/internal/manager/persistence/worker_tag.go
index 6c326866..ba8220d7 100644
--- a/internal/manager/persistence/worker_tag.go
+++ b/internal/manager/persistence/worker_tag.go
@@ -22,7 +22,7 @@ type WorkerTag struct {
 func (db *DB) CreateWorkerTag(ctx context.Context, wc *WorkerTag) error {
 	queries := db.queries()
 
-	now := db.gormDB.NowFunc()
+	now := db.now()
 	dbID, err := queries.CreateWorkerTag(ctx, sqlc.CreateWorkerTagParams{
 		CreatedAt:   now,
 		UUID:        wc.UUID,
@@ -76,7 +76,7 @@ func (db *DB) SaveWorkerTag(ctx context.Context, tag *WorkerTag) error {
 	queries := db.queries()
 
 	err := queries.SaveWorkerTag(ctx, sqlc.SaveWorkerTagParams{
-		UpdatedAt:   db.now(),
+		UpdatedAt:   db.nowNullable(),
 		UUID:        tag.UUID,
 		Name:        tag.Name,
 		Description: tag.Description,
diff --git a/internal/manager/persistence/workers.go b/internal/manager/persistence/workers.go
index 7971e13f..2fe37abd 100644
--- a/internal/manager/persistence/workers.go
+++ b/internal/manager/persistence/workers.go
@@ -71,7 +71,7 @@ func (w *Worker) StatusChangeClear() {
 func (db *DB) CreateWorker(ctx context.Context, w *Worker) error {
 	queries := db.queries()
 
-	now := db.now().Time
+	now := db.nowNullable().Time
 	workerID, err := queries.CreateWorker(ctx, sqlc.CreateWorkerParams{
 		CreatedAt: now,
 		UUID:      w.UUID,
@@ -149,7 +149,7 @@ func (db *DB) DeleteWorker(ctx context.Context, uuid string) error {
 	queries := db.queries()
 
 	rowsAffected, err := queries.SoftDeleteWorker(ctx, sqlc.SoftDeleteWorkerParams{
-		DeletedAt: db.now(),
+		DeletedAt: db.nowNullable(),
 		UUID:      uuid,
 	})
 	if err != nil {
@@ -224,7 +224,7 @@ func (db *DB) SaveWorkerStatus(ctx context.Context, w *Worker) error {
 	queries := db.queries()
 
 	err := queries.SaveWorkerStatus(ctx, sqlc.SaveWorkerStatusParams{
-		UpdatedAt:         db.now(),
+		UpdatedAt:         db.nowNullable(),
 		Status:            string(w.Status),
 		StatusRequested:   string(w.StatusRequested),
 		LazyStatusRequest: w.LazyStatusRequest,
@@ -245,7 +245,7 @@ func (db *DB) SaveWorker(ctx context.Context, w *Worker) error {
 	queries := db.queries()
 
 	err := queries.SaveWorker(ctx, sqlc.SaveWorkerParams{
-		UpdatedAt:          db.now(),
+		UpdatedAt:          db.nowNullable(),
 		UUID:               w.UUID,
 		Secret:             w.Secret,
 		Name:               w.Name,
@@ -270,7 +270,7 @@ func (db *DB) SaveWorker(ctx context.Context, w *Worker) error {
 func (db *DB) WorkerSeen(ctx context.Context, w *Worker) error {
 	queries := db.queries()
 
-	now := db.now()
+	now := db.nowNullable()
 	err := queries.WorkerSeen(ctx, sqlc.WorkerSeenParams{
 		UpdatedAt:  now,
 		LastSeenAt: now,
diff --git a/internal/manager/persistence/workers_test.go b/internal/manager/persistence/workers_test.go
index 77f6119c..dc8fcb58 100644
--- a/internal/manager/persistence/workers_test.go
+++ b/internal/manager/persistence/workers_test.go
@@ -62,7 +62,7 @@ func TestFetchWorkerTask(t *testing.T) {
 
 	startTime := time.Date(2024, time.July, 2, 7, 56, 0, 0, time.UTC)
 	mockNow := startTime
-	db.gormDB.NowFunc = func() time.Time { return mockNow }
+	db.nowfunc = func() time.Time { return mockNow }
 
 	// Worker without task.
 	w := Worker{