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Add a comment explaining allow_none
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@ -128,6 +128,8 @@ class RegistrationStore(SQLBaseStore):
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try:
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try:
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if was_guest:
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if was_guest:
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# Ensure that the guest user actually exists
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# Ensure that the guest user actually exists
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# ``allow_none=False`` makes this raise an exception
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# if the row isn't in the database.
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self._simple_select_one_txn(
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self._simple_select_one_txn(
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txn,
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txn,
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"users",
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"users",
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