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简单的要求:从记录获取一个记录集
a1 = where(MyModel, [x], is_nil(x.some_foreign_id)) |> Repo.one()
例外:
** (exit) an exception was raised:
** (Ecto.MultipleResultsError) expected at most one result but got 6 in query:
是的,有是一些记录,这是很正常的,但我的本意是拿第一一。为什么是异常和如何解决它?