是否可以将数组传递到 mysql 回调中,例如:
connection.query('SELECT count(id) as wynik FROM used where asset_id =
\''+asid+'\'', inventory[i],function(err,wiersze){
console.log(inventory[i]);
});
现在 inventory[i]
里面不可用,但我需要它。
最佳答案
由于您处于 for 循环中,因此您需要使用立即调用的匿名函数或简单的 .forEach()
。两者都在下面作为示例提供。
立即调用匿名函数
for (var i = 0; i < inventory.length; i++) {
(function(i) {
if (inventory[i].market_hash_name == rows[j].real_name) {
var asid = inventory[i].assetid;
connection.query('SELECT count(id) as wynik FROM used where asset_id = \'' + asid + '\'', function(err, wiersze) {
console.log(inventory[i]);
process.exit(1);
if (wiersze[0].wynik == 0) {
var employee = {
asset_id: asid,
trans_id: rows[j].tid
};
connection.query('INSERT INTO used SET ?', employee, function(err, res) {
if (err) throw err;
offer.addMyItem(inventory[i]);
});
licznik++;
}
});
}
})(i);
});
.forEach()
inventory.forEach(function(item) {
if (item.market_hash_name == rows[j].real_name) {
var asid = item.assetid;
connection.query('SELECT count(id) as wynik FROM used where asset_id = \'' + asid + '\'', function(err, wiersze) {
console.log(item);
process.exit(1);
if (wiersze[0].wynik == 0) {
var employee = {
asset_id: asid,
trans_id: rows[j].tid
};
connection.query('INSERT INTO used SET ?', employee, function(err, res) {
if (err) throw err;
offer.addMyItem(item);
});
licznik++;
}
});
}
});
关于javascript - node.js 将数组传递给 mysql 回调,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34966933/