Node.js 从数据库psql获取字符串

嗨，我需要帮助弄清楚如何将数据库中的字符串项放入变量中。我所有的代码都可以工作，如果我将数据库中的确切字符串复制并粘贴到我的bcrypt compare调用中，它就可以完美地工作。基本上，我的问题是我的变量“compare”打印为

[{“密码”：“$2a$10$eilJb6SGKSSQm2b.U5tj.ut4o8.ohyjnvhbkpjcppeomcj4glmeyqc”}]

但我只需要

“$2a$10$eilJb6SGKSSQm2b.U5tj.ut4o8.oHyJNVhbkpjcpeomCj4GlMEyqC”。有什么想法吗

 account.on("end", function(result) {
    if(result.rows.length > 0){
        console.log("found account: ");
        console.log(JSON.stringify(result.rows, null, "   "));
        //turn the db entry into a string
        compare = JSON.stringify(result.rows, null, "   ");
        //compare the hashed password from database to parameter for password change
        bcrypt.compare(password, compare, function(err, res) {
        console.log("res result: " + res);
            if(res){
                    console.log("passwords are same");
                    //new query updating the password in the db
                    if(person=="s"){
                        //update db
                        client.query('UPDATE students SET password=($2) WHERE email=($1)',
                        [req.body.email, hash_new]);
                        console.log("changed students password");
                    } else {
                        //update db
                        client.query('UPDATE teachers SET password=($2) WHERE email=($1)',
                        [req.body.email, hash_new]);
                        console.log("changed teacher password");
                    }
            } else {
            console.log("passwords are not the same");
            }
        });
    } else {
    console.log("account not found!");
    }
});

而不是

compare = JSON.stringify(result.rows, null, "   ");

试一试

您不需要JSON字符串，只需要JavaScript值

compare = result.rows[0].password;