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[backend/services] Fix multiple threads creating the same user simultaneously, causing postgres duplicate key exceptions

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Laura Hausmann 2024-02-12 05:56:28 +01:00
parent 6c955262ee
commit a8f174f02a
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GPG key ID: D044E84C5BE01605
1 changed files with 14 additions and 3 deletions
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17
Iceshrimp.Backend/Core/Services/UserService.cs
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@ -112,10 +112,21 @@ public class UserService(
KeyPem = actor.PublicKey.PublicKey
};
await db.AddRangeAsync(user, profile, publicKey);
await db.SaveChangesAsync();
try {
await db.AddRangeAsync(user, profile, publicKey);
await db.SaveChangesAsync();
return user;
}
catch (DbUpdateException) {
// another thread got there first, so we need to return the existing user
var res = await db.Users
.IncludeCommonProperties()
.FirstOrDefaultAsync(p => p.UsernameLower == user.UsernameLower && p.Host == user.Host);
return user;
// something else must have went wrong, rethrow exception
if (res == null) throw;
return res;
}
}
public async Task<User> UpdateUserAsync(User user) {