Die folgende Abfrage gibt keine Datensätze zurück:
"[SELECT Id FROM Account WHERE Id = :Trigger.new[0].Account__c]"
Wenn die Abfrage keine Zeilen zurückgibt, wird der Fehler "List has no rows for assignment to SObject" (In der Liste sind keine Zeilen für die Zuweisung zu SObject vorhanden) angezeigt.
Player__c player = [SELECT Id from Player__c where Name = :username]; if (player != null) p = player.Id;
Player__c[] players = [SELECT Id from Player__c where Name = :username]; if (players.size() > 0) p = players[0].Id;
000385697

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