Node.js for循环执行sql删除语句 返回结果集出现

Question

for (var i = 0; i < ManagerIDs.length; i++) {
var sql = 'delete from adminList where user_id = ?';
var args = parseInt(ManagerIDs[i]);
console.log(args);
myPool.query(sql, args, function (err, res) {
if (err) {
console.error('删除失败：%j' + err.stack);
callback(err, null);
}
else if (!!res) {
console.log("删除成功:%j", res);
callback({
result: 1, //表示有结果
res: res
});
} else {
callback(null, null);
}
});
}
多条删除出现错误Can't set headers after they are sent.，怎么办？

Answer 1

else if (!!res) {
console.log("删除成功:%j", res);
callback({
result: 1, //表示有结果
res: res
});
删除成功不要callback