[zzzeek]

I was actually going to comment on how breathtakingly ignorant the blog post author was for making this statement. What on earth ORM would make a UNIQUE constraint against multiple columns without an explicit instruction, much less where some of the columns are NULLable and then leave the user entirely unaware that anything like that was happening? ORMs do nothing like this and the developer would always have built this constraint explicitly and therefore is working at the DDL layer. ORMs have nothing to do with whether or not someone knows SQL just like cars have nothing to do with whether or not someone knows how to walk.