在 gcloud-node 事务中捕获错误
capture err in gcloud-node transaction
我正在尝试捕获交易错误。我有以下代码应该会导致错误,因为这些实体已经存在,但控制台中没有输出任何内容:
datastore.runInTransaction(function(transaction, done) {
transaction.save([
{
key: my_key1,
method: 'insert',
data: {
stuff: 'stuff'
}
},
{
key: my_key2,
method: 'insert',
data: {
stuff: 'stuff'
}
}
]);
console.log('here');
done(function(err, data) {
if (err) {
console.log('err : ' + err);
transaction.rollback();
return;
}
console.log('no error');
return;
});
});
});
done
没有收到回调。将该回调作为 runInTransaction
.
的第二个参数
var cachedTransaction;
datastore.runInTransaction(function(transaction, done) {
cachedTransaction = transaction;
transaction.save([
{
key: my_key1,
method: 'insert',
data: {
stuff: 'stuff'
}
},
{
key: my_key2,
method: 'insert',
data: {
stuff: 'stuff'
}
}
]);
done();
}, function(err) {
if (err) {
console.log('err : ' + err);
cachedTransaction.rollback();
return;
}
console.log('no error');
});
注意:我们正在为此开发更好的API:https://github.com/GoogleCloudPlatform/gcloud-node/issues/633
我正在尝试捕获交易错误。我有以下代码应该会导致错误,因为这些实体已经存在,但控制台中没有输出任何内容:
datastore.runInTransaction(function(transaction, done) {
transaction.save([
{
key: my_key1,
method: 'insert',
data: {
stuff: 'stuff'
}
},
{
key: my_key2,
method: 'insert',
data: {
stuff: 'stuff'
}
}
]);
console.log('here');
done(function(err, data) {
if (err) {
console.log('err : ' + err);
transaction.rollback();
return;
}
console.log('no error');
return;
});
});
});
done
没有收到回调。将该回调作为 runInTransaction
.
var cachedTransaction;
datastore.runInTransaction(function(transaction, done) {
cachedTransaction = transaction;
transaction.save([
{
key: my_key1,
method: 'insert',
data: {
stuff: 'stuff'
}
},
{
key: my_key2,
method: 'insert',
data: {
stuff: 'stuff'
}
}
]);
done();
}, function(err) {
if (err) {
console.log('err : ' + err);
cachedTransaction.rollback();
return;
}
console.log('no error');
});
注意:我们正在为此开发更好的API:https://github.com/GoogleCloudPlatform/gcloud-node/issues/633