javascript - 如何使用 Express JS 响应 JSON

Question

抱歉英语不好，因为我不会说英语，只会说谷歌翻译:)

我有一个问题..

我有这个 MySQL 查询:

SELECT destinations.*, questions.*, answers.* FROM destinations INNER JOIN questions ON questions.quest_dest = destinations.dest_id INNER JOIN answers ON questions.quest_id = answers.answer_quest_id WHERE destinations.dest_active = 1

此查询有效，没有问题。我在 Express JS 中有一个模态文件。

const connection = require('../utility/databaseConnection');

module.exports = class Destinations{
    static AllDestinations(){
        return connection.execute("SELECT destinations.*, questions.*, answers.* FROM destinations INNER JOIN questions ON questions.quest_dest = destinations.dest_id INNER JOIN answers ON questions.quest_id = answers.answer_quest_id WHERE destinations.dest_active = 1");

    } }

如果我得到了，不是问题响应来了......不好来......

    [
        {
            "dest_id": 2,
            "dest_name": "İstanbul",
            "dest_lat": "41.0078254",
            "dest_lng": "28.9777912",
            "dest_active": "1",
            "quest_id": 1,
            "quest_text": "Bir dönemler Dünya'nın merkezi olmuş bu tarihi şehir neresidir?",
            "quest_dest": 2,
            "answer_id": 1,
            "answer_text": "Moskova",
            "answer_quest_id": 1,
            "answer_true": 0,
            "answer_point": 6400
        },
        {
            "dest_id": 2,
            "dest_name": "İstanbul",
            "dest_lat": "41.0078254",
            "dest_lng": "28.9777912",
            "dest_active": "1",
            "quest_id": 1,
            "quest_text": "Bir dönemler Dünya'nın merkezi olmuş bu tarihi şehir neresidir?",
            "quest_dest": 2,
            "answer_id": 2,
            "answer_text": "İstanbul",
            "answer_quest_id": 1,
            "answer_true": 1,
            "answer_point": 10000
        },
]

这不好，我需要这个:

    [
        {
            "dest_id": 2,
            "dest_name": "İstanbul",
            "dest_lat": "41.0078254",
            "dest_lng": "28.9777912",
            "dest_active": "1",
            "questions": [
               {
                 "quest_id": 1,
                 "quest_text": "Bir dönemler Dünya'nın merkezi olmuş bu tarihi şehir neresidir?",
                 "quest_dest": 2,
                 "answers" : [
                   {  
                    "answer_id": 1,
                    "answer_text": "Moskova",
                    "answer_quest_id": 1,
                    "answer_true": 0,
                    "answer_point": 6400
                   },
                   {  
                    "answer_id": 2,
                    "answer_text": "İstanbul",
                    "answer_quest_id": 1,
                    "answer_true": 1,
                    "answer_point": 10000
                   }]
                }]
     }
]

Answer 1

由于您从数据库中获取了正确的信息，因此只需从该对象中提取数据并以您想要的新格式添加它即可。