从数据库 psql 获取字符串

Question

您好，我需要帮助弄清楚如何将数据库中的字符串条目放入变量中。我的所有代码都有效，如果我将数据库中的确切字符串复制并粘贴到我的 bcrypt 比较调用中，它就可以完美运行。基本上我的问题是我的变量 "compare" 打印为

[{"password": "$2a$10$eilJb6SGKSSQm2b.U5tj.ut4o8.oHyJNVhbkpjcpeomCj4GlMEyqC"}]

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=() WHERE email=()',
                        [req.body.email, hash_new]);
                        console.log("changed students password");
                    } else {
                        //update db
                        client.query('UPDATE teachers SET password=() WHERE email=()',
                        [req.body.email, hash_new]);
                        console.log("changed teacher password");
                    }
            } else {
            console.log("passwords are not the same");
            }
        });
    } else {
    console.log("account not found!");
    }
});

Answer 1

而不是

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

尝试

compare = result.rows[0].password;

您不需要 JSON 字符串，而是 JavaScript 值。

从数据库 psql 获取字符串

getting string from database psql

database

string

node.js

psql