将JSON子字符串推送/分配给相应的父级

Question

我有一个从API生成的JSON字符串。

[{"categories":{"category":{"id":"1","Name":"furit"}}},{"categories":{"category":{"id":"2","Name":"veg"}}},{"products":{"product":{"id":"1","Name":"fruit"}}},{"products":{"product":{"id":"2","Name":"pears"}}}]

如何将所有子值推送到父级，看起来像这样。

[{"categories":{"category":[{"id":"1","name":"fruit"},{"id":"2","name":"veg"}]}},{"products":{"products":[{"id":"1","name":"apple"},{"id":"2","name":"pears"}]}}]

感谢。

更新了数据结构

Answer 1

您可以创建新对象并使用map来更改数据结构并将该数据分配给新对象。

var data = [{"categories":{"category":{"id":"1","Name":"furit"}}},{"categories":{"category":{"id":"2","Name":"veg"}}}]
  
var r = {
  categories: {
    category: data.map(o => o.categories.category)
  }
}
console.log(r)

已更新对于新数据结构，您可以使用forEach()循环并添加到对象。

var data = [{"categories":{"category":{"id":"1","Name":"furit"}}},{"categories":{"category":{"id":"2","Name":"veg"}}},{"products":{"product":{"id":"1","Name":"fruit"}}},{"products":{"product":{"id":"2","Name":"pears"}}}]

var r = {categories: {category: []}, products: {product: []}}
data.forEach(function(e) {
  if(e.categories) r.categories.category.push(e.categories.category)
  if(e.products) r.products.product.push(e.products.product)
})

console.log(r)

Answer 2

您可以使用 Array.prototype.reduce() method ，它会减少单个category数组中的所有数组项categories对象，从而获得预期结果

您的代码应如下所示：

var result = data.reduce(function(a, b) {
  a[0].categories.push(b.categories);
  return a;
}, [{
  categories: []
}]);

或者，如果您想要object而不是array，请使用以下内容：

var result = data.reduce(function(a, b) {
  a.categories.push(b.categories);
  return a;
}, {
  categories: []
});

<强>演示：

var data = [{
    "categories": {
      "category": {
        "id": "1",
        "Name": "furit"
      }
    }
  },
  {
    "categories": {
      "category": {
        "id": "2",
        "Name": "veg"
      }
    }
  }
];

var result = data.reduce(function(a, b) {
  a[0].categories.push(b.categories);
  return a;
}, [{
  categories: []
}]);

console.log(result);

编辑：

将products添加到初始对象后进行编辑：

var result = data.reduce(function(a, b) {
  if(b.categories)
      a[0].categories.push(b.categories);
   if(b.products)   
       a[0].products.push(b.products);
  return a;
}, [{
  categories: [],
  products : []
}]);

<强>演示：

var data = [{"categories":{"category":{"id":"1","Name":"furit"}}},{"categories":{"category":{"id":"2","Name":"veg"}}},{"products":{"product":{"id":"1","Name":"fruit"}}},{"products":{"product":{"id":"2","Name":"pears"}}}]
;

var result = data.reduce(function(a, b) {
  if(b.categories)
      a[0].categories.push(b.categories);
   if(b.products)   
       a[0].products.push(b.products);
  return a;
}, [{
  categories: [],
  products : []
}]);

console.log(result);