0
Contract.all(:conditions => ['voided == ?', 0]).size
=> 364
Contract.all(:conditions => ['voided != ?', 0]).size
=> 8
Contract.all.size
=> 441
這3個數字沒有加起來(364 + 8!= 441)。寫入:conditions
以計算voided
列值爲NULL或等於零的行的正確方法是什麼?NULL value in:conditions =>