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As I said in response to a sibling: But can you can not (in a simple way) prevent that both a circle and a triangle point to the same user and you can not enfor
by laszlokorte 5y ago
As I said in response to a sibling:
But can you can not (in a simple way) prevent that both a circle and a triangle point to the same user and you can not enforce a NOT NULL for a user to must have a favourite shape.