使用嵌套對象（JS）重新排列數組

Question

我收到來自數據源的以下活動響應。這些具有獨特的開始時間，並且可以屬於同一產品。

當前產品信息對象嵌套在活動中。我試圖「重新安排」並對信息進行分組，嘗試失敗。

我需要的結構是在產品中的對象中包含具有相同產品代碼的活動的產品（productCode）。 例如。 「PRODUCTCODE」： 「PTFTVD」 「活動」：[{活動1，活動2等}]

var activities = [ 
    { 
    "id":39170350, 
    "productCode":"PTFTVD", 
    "startTime":"2017-09-06T00:00:00Z", 
    "endTime":"2017-09-06T05:30:00Z", 
    "startTimeLocal":"2017-09-06 10:00:00", 
    "endTimeLocal":"2017-09-06 15:30:00", 
    "product":{ 
    "productCode":"PTFTVD", 
    "productType":"DAYTOUR", 
    "name":"01 Koala & River Cruise - Return cruise with Entry into Lone Pine", 
    "shortDescription":"The Koala and River Cruise is a memorable" 
    } 
    }, 
{ 
    "id":41498876, 
    "productCode":"PJIOQO", 
    "startTime":"2017-09-06T04:15:00Z", 
    "discount":{ 
    "id":7, 
    "title":"Discount Rulezzz" 
    }, 
    "product":{ 
    "productCode":"PJIOQO", 
    "productType":"CUSTOM", 
    "name":"1 Hour 15 Minute Segway Joy Ride Experience", 
    "shortDescription":"Tour Length 14km approx. " 
    } 
    }, 
    { 
    "id":41498757, 
    "productCode":"PJIOQO", 
    "startTime":"2017-09-07T04:15:00Z", 
    "product":{ 
    "productCode":"PJIOQO", 
    "productType":"CUSTOM", 
    "name":"1 Hour 15 Minute Segway Joy Ride Experience", 
    "shortDescription":"Tour Length 14km approx. Almost non stop segway r…nd we custom make this tour to " 
    } 
    }, 
    { 
    "id":41498846, 
    "productCode":"PJIOQO", 
    "startTime":"2017-09-08T04:15:00Z", 
    "product":{ 
    "productCode":"PJIOQO", 
    "productType":"CUSTOM", 
    "name":"1 Hour 15 Minute Segway Joy Ride Experience", 
    "shortDescription":"Tour Length 14km approx. Almost non stop segway r…nd we custom" 
    } 
    }, 
    { 
    "id":41498600, 
    "productCode":"PJIOQO", 
    "startTime":"2017-09-09T04:15:00Z", 
    "product":{ 
    "productCode":"PJIOQO", 
    "productType":"CUSTOM", 
    "name":"1 Hour 15 Minute Segway Joy Ride Experience", 
    "shortDescription":"Tour Length 14km approx. Almost non stop segway r…nd we custom make this tour t" 
    } 
    } 
] 

Answer 1

基本上數據的切換在兩個階段中進行分組：

1. 集團的產品，
2. 收集產品的活動。

對於1，您需要一個可搜索的數據結構，如對象或Map，您需要收集密鑰和數據。

在這裏，您可以使用productCode作爲關鍵字，並將product的數據作爲新值。然後添加一個用於收集活動的屬性。

對結果集使用數組並將新產品推送到結果集，同時產品仍可通過對象中的鍵訪問。

現在轉到2.並收集所有數據並將其分配給活動數組。

瞧！

var activities = [{ id: 39170350, productCode: "PTFTVD", startTime: "2017-09-06T00:00:00Z", endTime: "2017-09-06T05:30:00Z", startTimeLocal: "2017-09-06 10:00:00", endTimeLocal: "2017-09-06 15:30:00", product: { productCode: "PTFTVD", productType: "DAYTOUR", name: "01 Koala & River Cruise - Return cruise with Entry into Lone Pine", shortDescription: "The Koala and River Cruise is a memorable" } }, { id: 41498876, productCode: "PJIOQO", startTime: "2017-09-06T04:15:00Z", discount: { id: 7, title: "Discount Rulezzz" }, product: { productCode: "PJIOQO", productType: "CUSTOM", name: "1 Hour 15 Minute Segway Joy Ride Experience", shortDescription: "Tour Length 14km approx. " } }, { id: 41498757, productCode: "PJIOQO", startTime: "2017-09-07T04:15:00Z", product: { productCode: "PJIOQO", productType: "CUSTOM", name: "1 Hour 15 Minute Segway Joy Ride Experience", shortDescription: "Tour Length 14km approx. Almost non stop segway r…nd we custom make this tour to " } }, { id: 41498846, productCode: "PJIOQO", startTime: "2017-09-08T04:15:00Z", product: { productCode: "PJIOQO", productType: "CUSTOM", name: "1 Hour 15 Minute Segway Joy Ride Experience", shortDescription: "Tour Length 14km approx. Almost non stop segway r…nd we custom" } }, { id: 41498600, productCode: "PJIOQO", startTime: "2017-09-09T04:15:00Z", product: { productCode: "PJIOQO", productType: "CUSTOM", name: "1 Hour 15 Minute Segway Joy Ride Experience", shortDescription: "Tour Length 14km approx. Almost non stop segway r…nd we custom make this tour t" } }], 
 
    hash = Object.create(null), 
 
    products = []; 
 

 
activities.forEach(function (a) { 
 
    var temp = {}, 
 
     key = a.product.productCode; 
 
    if (!hash[key]) { 
 
     hash[key] = {}; 
 
     Object.keys(a.product).forEach(function (k) { 
 
      hash[key][k] = a.product[k]; 
 
     }); 
 
     products.push(hash[key]); 
 
     hash[key].activities = []; 
 
    } 
 
    Object.keys(a).forEach(function (k) { 
 
     if (k !== 'product') { 
 
      temp[k] = a[k]; 
 
     } 
 
    }); 
 
    hash[key].activities.push(temp); 
 
}); 
 

 
console.log(products);

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Answer 2

如果您正在使用ES6你可以做以下

.... 
//activities already defined 
let projectToActivityObject = {} 
activities.forEach((activity) => { 
    let productID = activity.product.productCode; 
    projectToActivityObject[productID] = projectToActivityObject.hasOwnProperty(productID) ? projectToActivityObject[productID] : new Set(); 
    projectToActivityObject[productID].add(activity); 
}); 
console.log(projectToActivityObject);