[openstreetmap/openstreetmap-website] Diff upload does not allow forward references to placeholders (#1465)

[Matt Amos]

> My reason is the replication stream, which can be generally assumed to be broken down into components which are individually valid. This would break that assumption.

I don't understand why reordering on the server or the client would necessarily break that assumption. As long as whatever reordering is done before PKs are assigned, then it seems like the order of items in the replication stream would be the same as the order in which the items were committed to the database. Does that sound correct?


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