Question

我有一个基于node.js的express-server，它应该处理一些数据库操作。目前，我尝试根据提供的电子邮件获取我的SQL数据库的一些信息。在执行下面的操作时，我遇到了一个奇怪的错误。

app.get("/character/:account_email", jsonparser, (req, res) => {
    database.query("SELECT account_email, character_name, creation_date, blood, money, experience_points, age, is_alive, place_name FROM vmpr_character WHERE account_email = ?", [req.params.account_email], (error, response, fields) => {
        res.set({ "Content-Type": "application/json" });
        if (!error) {
            res.status(201);
            res.write(JSON.stringify(response[0]));

            database.query("SELECT attribute_name, level FROM character_attributes JOIN vmpr_character USING (account_email) WHERE character_attributes.account_email = ?", [req.params.account_email], (error2, response2, fields2) => {
                if (!error2) {
                    res.write(JSON.stringify(response2));
                } else {
                    res.status(502);
                }
            });
        } else {
            res.status(404);
            res.write(JSON.stringify(dummy));
        }
        res.end();
    });
});

TypeError: Cannot read property 'Symbol(asyncId)' of null
    at write_ (_http_outgoing.js:636:24)
    at ServerResponse.write (_http_outgoing.js:630:10)
    at Query.database.query [as _callback] (/Users/nightmare/vmpr/components/database_server/NodeJS/server.js:103:10)
    at Query.Sequence.end (/Users/nightmare/vmpr/components/database_server/NodeJS/node_modules/mysql/lib/protocol/sequences/Sequence.js:86:24)
    at Query._handleFinalResultPacket (/Users/nightmare/vmpr/components/database_server/NodeJS/node_modules/mysql/lib/protocol/sequences/Query.js:137:8)
    at Query.EofPacket (/Users/nightmare/vmpr/components/database_server/NodeJS/node_modules/mysql/lib/protocol/sequences/Query.js:121:8)
    at Protocol._parsePacket (/Users/nightmare/vmpr/components/database_server/NodeJS/node_modules/mysql/lib/protocol/Protocol.js:280:23)
    at Parser.write (/Users/nightmare/vmpr/components/database_server/NodeJS/node_modules/mysql/lib/protocol/Parser.js:75:12)
    at Protocol.write (/Users/nightmare/vmpr/components/database_server/NodeJS/node_modules/mysql/lib/protocol/Protocol.js:39:16)
    at Socket.<anonymous> (/Users/nightmare/vmpr/components/database_server/NodeJS/node_modules/mysql/lib/Connection.js:103:28)

将一些数据发布到同一个数据库时会出现同样的错误。即使所提供的数据仍然正常保存，服务器也会在POST和GET上崩溃。在mysql中直接执行这些查询会得到正确的结果。所有日志都很好。

编辑： *使用提供的更新，错误消失，新错误要好得多处理。 *现在一切都很好。谢谢！

Answer 1

这将在今天应该登陆的node v8.2.1中修复。

TypeError：无法读取属性＆＃39;符号（asyncId）＆＃39;为null

1 个答案: