javascript - 比较 NodeJs 和 Express 中的两个 JSON

Question

我正在尝试比较 NodeJs 中的两个 JSON 文件。如果有与地点 id 匹配的评论，我需要将评论数据推送到地点 JSON 中。如果没有匹配的评论，则会推送一个空数组。

这是代码:

//放置 JSON

[{
        "id": 1,
        "title": "Hotel in Sidney",
        "maxNumberOfGuests": 5,
        "description": "Quiet place by the water.",
        "createdAt": "2019/12/7 14:34",
        "price": 120
    },
    {
        "id": 2,
        "title": "Cabin in Italy",
        "maxNumberOfGuests": 2,
        "description": "Romantic lake cabin for two.",
        "createdAt": "2019/4/7 10:00",
        "price": 250
    }
]

//评论 JSON

[{
        "id": 1,
        "numberOfStars": 3,
        "content": "Comfy place",
        "placeId": 1,
        "createdAt": 12345
    },
    {
        "id": 2,
        "numberOfStars": 4,
        "content": "Awesome lake view.",
        "placeId": "",
        "createdAt": 23456
    }
]

这是期望的结果:

[{
        "id": 1,
        "title": "Hotel in Sidney",
        "maxNumberOfGuests": 5,
        "description": "Quiet place by the water.",
        "createdAt": "2019/12/7 14:34",
        "reviews": [{
            "id": 1,
            "numberOfStars": 3,
            "content": "Comfy place",
            "placeId": 1,
            "createdAt": 12345
        }],
        "price": 120
    },
    {
        "id": 2,
        "title": "Cabin in Italy",
        "maxNumberOfGuests": 2,
        "description": "Romantic lake cabin for two.",
        "createdAt": "2019/4/7 10:00",
        "reviews": [],
        "price": 250
    }
]

这是我能走多远:

places.forEach(p => {
  const { id } = p;
  console.log(id);
  return id;
});

reviews.forEach(r => {
  const { id, numberOfStars, content, placeId, createdAt } = r;
  // console.log(id, numberOfStars, content, placeId, createdAt);
  console.log(r);
  return r;
});

//node express routes to places where will display the desired result. 

router.get('/places', function(req, res) {
  res.json(places);
});

我就是无法让它发挥作用，需要一些帮助。

提前致谢。

Answer 1

试试这个

let places =[{
        "id": 1,
        "title": "Hotel in Sidney",
        "maxNumberOfGuests": 5,
        "description": "Quiet place by the water.",
        "createdAt": "2019/12/7 14:34",
        "price": 120
    },
    {
        "id": 2,
        "title": "Cabin in Italy",
        "maxNumberOfGuests": 2,
        "description": "Romantic lake cabin for two.",
        "createdAt": "2019/4/7 10:00",
        "price": 250
    }
];

let reviews =[{
        "id": 1,
        "numberOfStars": 3,
        "content": "Comfy place",
        "placeId": 1,
        "createdAt": 12345
    },
    {
        "id": 2,
        "numberOfStars": 4,
        "content": "Awesome lake view.",
        "placeId": "",
        "createdAt": 23456
    }
];
places.forEach(function(place) {
  place.reviews = reviews.filter(review => review.placeId ===place.id);
});


console.log(places);