我需要对参数化查询做些什么特别的事情吗?
以下似乎成功了(我正在使用promise-ified client.query
see end),
console.log('cancel for', data);
var cancelInviteQuery = 'delete from friendship where user_1=$1 and user_2_canonical=$2';
return query(cancelInviteQuery, [data.id, data.friend])
.then(function (results) {
console.log('ran delete frienship', results);
})
.catch(function (error) {
console.error('failed to drop friendship', error);
});
因为我得到了输出:
cancel for {"id":3,"friend":"m"}
ran delete frienship []
但是随后对数据库的以下查询显示该记录仍然存在
select * from friendship;
id | user_1 | user_2 | user_2_canonical | confirmed | ignored
----+--------+--------+------------------+-----------+---------
8 | 3 | 9 | m | f | f
然后当我直接针对数据库进行以下查询时(使用 psql 客户端),以下查询成功
delete from friendship where user_1=3 and user_2_canonical='m'
我的query
函数(node-postgres 的包装器client.query
):
function query(sql, params) {
var promise = new RSVP.Promise(function (resolve, reject) {
pg.connect(CONNECTIONSTRING, function (error, client, done) {
if (error) { reject(error); return; }
client.query(sql, params, function (error, result) {
done(); // Greedy close.
if (error) {
reject(error);
return;
}
else if (result.hasOwnProperty('rows')) {
resolve(result.rows);
} else { resolve(result.rows); }
});
});
});
return promise;
}