如何在Laravel中雄辩地获取每天，每周，每月和每年的同一记录的最新更新值？

Question

This is my product_price table: Notice that product_id 1 is updated multiple times on the same day. This is my current query:

$product = ProductPriceModel::where(['product_id' => $request->product_id])->distinct()->latest()->get()->groupBy(function ($date) {
                    return Carbon::parse($date->created_at)->format('Y-m-d');
                });

which give me this result:

"data": {
    "productDetails": {
        "2018-09-17": [
            {
                "min_price": 0,
                "max_price": 1150,
                "price_diff": "425"
            },
            {
                "min_price": 100,
                "max_price": 200,
                "price_diff": "-945"
            }
        ],
        "2018-09-10": [
            {
                "min_price": 1070,
                "max_price": 1120,
                "price_diff": "-30"
            },
            {
                "min_price": 1100,
                "max_price": 1150,
                "price_diff": "15"
            },
            {
                "min_price": 1080,
                "max_price": 1140,
                "price_diff": "0"
            }
        ]
    }
}

What I expect it to return is only one record for each date. What changes needs to be done in above query to get exactly one record for each date?

Answer 1

If you want to get only one record you need to use first() in place of get() please give a try

$product = ProductPriceModel::where(['product_id' => $request->product_id])->distinct()->latest()->first()->groupBy(function ($date) {
                    return Carbon::parse($date->created_at)->format('Y-m-d');
                });