[英]How to write key + values to a JSON file with Node.js and Socket.io
I am working on a scoreboard with Socket.io and Node.js . 我正在使用Socket.io和Node.js制作记分牌。 Now I would like to save the scores of the participants into a JSON file.
现在,我想将参与者的分数保存到JSON文件中。
This is what I tried to do: 这是我尝试做的:
socket.on('part score', function(name, score){
let jdata = fs.readFileSync('participants.json');
let json = JSON.parse(jdata);
console.log(name, score);
//outputs: foo 10
fs.writeFile('participants.json', JSON.stringify(json.jury1.push({name: score}, null, 2)), function(){
console.log("name added: "+name+" value added: "+score);
});
});
How my JSON file looks like: 我的JSON文件如下所示:
{"jury1": []}
When I executed to code above my JSON files turns into "3" when the score is 10. Also everything in my JSON file is gone after execution. 当我在上面的代码中执行代码时,得分为10时,JSON文件变成“ 3”。执行后,JSON文件中的所有内容也消失了。
How do I properly add the key+value into my Jury1? 如何将键+值正确添加到Jury1中? Thanks already!
已经谢谢你了!
ps: name and score gets send through the client sided script ps:名称和分数通过客户端脚本发送
Jury1 is an array? Jury1是一个数组吗?
I think that you should parse all the data that you want so instead of doing: 我认为您应该解析所需的所有数据,而不要这样做:
JSON.stringify(json.jury1.push({name: score}, null, 2)
try something like: 尝试类似:
jury1 with the score you need var data = JSON.stringify(jury1)
You already have a json file. 您已经有一个json文件。 Why are you doing a JSON.parse again ?
为什么还要再次执行JSON.parse? I suspect that is the issue.
我怀疑这是问题所在。 can you try to print the content of json.jury1 to confirm the same ?
您可以尝试打印json.jury1的内容以确认相同吗?
Also, check the result from fs.writeFile() if there is any err 另外,检查fs.writeFile()的结果是否有错误
fs.writeFile('participants.json', JSON.stringify(json.jury1.push({name: score}, null, 2)), function(err){
console.log(err, "name added: "+name+" value added: "+score);
});
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