如何过滤掉 JSON 数组中的嵌套对象？

Question

这是我的 JSON 对象数组，其中包含嵌套对象：

var obj=   [
       {
          "ASIN":"BCXXXXX1",
          "VariationAttributes":[
             {
                "Name":"hand_orientation",
                "Value":"Left Hand"
             },
             {
                "Name":"shaft_material_type",
                "Value":"KBS Max 90 Steel"
             }
          ]
       },
       {
          "ASIN":"BCXXXXX2",
          "VariationAttributes":[
             {
                "Name":"hand_orientation",
                "Value":"Right Hand"
             },
             {
                "Name":"shaft_material_type",
                "Value":"KBS Max 90 Steel"
             }
          ]
       }
    ]

var curState=[
   {
      "Name":"hand_orientation",
      "Value":"Left Hand"
   },
   {
      "Name":"shaft_material_type",
      "Value":"KBS Max 90 Steel"
   }
]

现在我想过滤掉具有与 curState 匹配的变体属性的项目。

var result = obj.map(m=>m.VariationAttributes).filter(search, curState);


function search(item){
  return Object.keys(this).some((key) => item[key] === this[key]);
}

结果是空白。 你可以在https://playcode.io./518049玩代码

Answer 1

您可以使用.filter()根据回调函数过滤您的arr 。 如果来自当前对象VariationAttributes属性的.some()名称或值属性不等于其在curState对象中的相应对象的名称或值属性，则回调函数将返回 true，如下curState ：

 const arr = [{ "ASIN": "BCXXXXX1", "VariationAttributes": [{ "Name": "hand_orientation", "Value": "Left Hand" }, { "Name": "shaft_material_type", "Value": "KBS Max 90 Steel" } ] }, { "ASIN": "BCXXXXX2", "VariationAttributes": [{ "Name": "hand_orientation", "Value": "Right Hand" }, { "Name": "shaft_material_type", "Value": "KBS Max 90 Steel" } ] } ]; const curState = [{ "Name": "hand_orientation", "Value": "Left Hand" }, { "Name": "shaft_material_type", "Value": "KBS Max 90 Steel" } ]; const res = arr.filter( obj => obj.VariationAttributes.some(({Name, Value}, i) => curState[i] && (Name !== curState[i].Name || Value !== curState[i].Value)) ); console.log(res);

你也可以使用JSON.stringifiy()在你的curState这样你可以比较的字符串版本VariationAttributes对VariationAttributes属性的字符串版本：

 const arr = [{ "ASIN": "BCXXXXX1", "VariationAttributes": [{ "Name": "hand_orientation", "Value": "Left Hand" }, { "Name": "shaft_material_type", "Value": "KBS Max 90 Steel" } ] }, { "ASIN": "BCXXXXX2", "VariationAttributes": [{ "Name": "hand_orientation", "Value": "Right Hand" }, { "Name": "shaft_material_type", "Value": "KBS Max 90 Steel" } ] } ]; const curState = [{ "Name": "hand_orientation", "Value": "Left Hand" }, { "Name": "shaft_material_type", "Value": "KBS Max 90 Steel" } ]; const strCurState = JSON.stringify(curState); const res = arr.filter( obj => strCurState !== JSON.stringify(obj.VariationAttributes) ); console.log(res);

Answer 2

 var obj = [{ "ASIN": "BCXXXXX1", "VariationAttributes": [{ "Name": "hand_orientation", "Value": "Left Hand" }, { "Name": "shaft_material_type", "Value": "KBS Max 90 Steel" }] },{"ASIN":"BCXXXXX2", "VariationAttributes": [{ "Name": "hand_orientation","Value": "Right Hand"}, {"Name": "shaft_material_type", "Value": "KBS Max 90 Steel"}]}]; var curState = [{"Name": "hand_orientation", "Value": "Left Hand"},{"Name":"shaft_material_type", "Value": "KBS Max 90 Steel"}]; var finalResult = obj.filter(parentObj => { return JSON.stringify(parentObj.VariationAttributes) === JSON.stringify(curState); }); console.log(finalResult)

变量finalResult将具有过滤后的数组。

Answer 3

看看这个。

 var obj=[{ "ASIN": "BCXXXXX1", "VariationAttributes": [{ "Name": "hand_orientation", "Value": "Left Hand" }, { "Name": "shaft_material_type", "Value": "KBS Max 90 Steel" }] },{"ASIN":"BCXXXXX2", "VariationAttributes": [{ "Name": "hand_orientation","Value": "Right Hand"}, {"Name": "shaft_material_type", "Value": "KBS Max 90 Steel"}]}]; var curState=[{"Name": "hand_orientation", "Value": "Left Hand"},{"Name":"shaft_material_type", "Value": "KBS Max 90 Steel"}]; //var result = obj.map(m=>m.VariationAttributes).filter(search, curState); var result = obj.filter(item => { return item.VariationAttributes.every(attr => { return curState.find(state => attr.Name === state.Name && attr.Value === state.Value); }) }); console.log(result); function search(item){ return Object.keys(this).some((key) => item[key] === this[key]); } //console.log(obj)