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fix: Wrap watchlist set operation in database transaction (apn-7mukl) #297

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Merged
paulvanbrenk merged 2 commits into from
Feb 16, 2026
Merged

fix: Wrap watchlist set operation in database transaction (apn-7mukl) #297

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3505110
fix: Wrap watchlist set operation in transaction for atomicity (apn-7…
Feb 16, 2026
3a7ff82
Merge branch 'main' into merge/apn-u9ef4a
paulvanbrenk Feb 16, 2026
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39 changes: 23 additions & 16 deletions PatchNotes.Api/Routes/WatchlistRoutes.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -75,26 +75,33 @@ public static WebApplication MapWatchlistRoutes(this WebApplication app)
return Results.BadRequest(new ApiError("One or more package IDs do not exist"));
}

var existing = await db.Watchlists
.Where(w => w.UserId == user.Id)
.ToListAsync();
db.Watchlists.RemoveRange(existing);

foreach (var packageId in distinctIds)
var strategy = db.Database.CreateExecutionStrategy();
var resultIds = await strategy.ExecuteAsync(async () =>
{
db.Watchlists.Add(new Watchlist
await using var transaction = await db.Database.BeginTransactionAsync();

var existing = await db.Watchlists
.Where(w => w.UserId == user.Id)
.ToListAsync();
db.Watchlists.RemoveRange(existing);

foreach (var packageId in distinctIds)
{
UserId = user.Id,
PackageId = packageId,
});
}
db.Watchlists.Add(new Watchlist
{
UserId = user.Id,
PackageId = packageId,
});
}

await db.SaveChangesAsync();
await db.SaveChangesAsync();
await transaction.CommitAsync();

var resultIds = await db.Watchlists
.Where(w => w.UserId == user.Id)
.Select(w => w.PackageId)
.ToArrayAsync();
return await db.Watchlists
.Where(w => w.UserId == user.Id)
.Select(w => w.PackageId)
.ToArrayAsync();
});

return Results.Ok(resultIds);
})
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