在没有数组的情况下读取并推送另一个对象中的对象 [英] Read and push object in another object without array

问题描述

我正在尝试从JSON检查并推送对象详细信息中的对象.

I am trying to check and push object in an object details from a JSON.

这就是我的JSON的样子

This is how my JSON look like

{
  "stylesheet": {
    "attribute-set": [
      {
        "attribute": [
          {
            "_name": "text-align",
            "__prefix": "xsl",
            "__text": "end"
          },
          {
            "_name": "end-indent",
            "__prefix": "xsl",
            "__text": "10pt"
          }
        ],
        "_name": "odd__header",
        "__prefix": "xsl"
      },     
      {
        "attribute": {
          "_name": "font-weight",
          "__prefix": "xsl",
          "__text": "bold"
        },
        "_name": "pagenum",
        "__prefix": "xsl"
      }
      ],
    "_xmlns:xsl": "http://www.w3.org/1999/XSL/Transform",
    "_xmlns:fo": "http://www.w3.org/1999/XSL/Format",
    "_version": "2.0",
    "__prefix": "xsl"
  }
}

现在，我正在尝试读取属性设置值[1] ，即； "pagenum" .在这里，我正在尝试检查具有名称的更多属性值.如果不存在，则将其推入该属性集中.

Now , I am trying to read the attribute-set value [1] ie; "pagenum" . HEre I am trying to check for more attribute value with name. If not present push it into that attribute set.

我将 attribute-set [0 ]放入array并没有任何问题.在这里，我在 attribute-set [1]中得到了一个对象.

I don't have any problem in pushing into attribute-set[0] as it is in array . Here I got single object in attribute-set[1].

将此属性用于attr-set [1]，但抛出错误-Uncaught TypeError: $scope.contentObj.stylesheet.attribute-set[1].attribute.some is not a function

Tried this for attr-set[1], but throwing error - Uncaught TypeError: $scope.contentObj.stylesheet.attribute-set[1].attribute.some is not a function

//for checking font name
            var checkcontentPageFont = obj => obj._name === 'font-family';
            // check font family
            var checkcontentPageFont_available = $scope.contentObj.stylesheet["attribute-set"][1].attribute.some(checkcontentPageFont);

            if(checkcontentPageFont_available  === true ){
            }
            else{
                 $scope.contentObj.stylesheet["attribute-set"][1].attribute.push({
                            "_name": "font-family",
                            "__prefix": "xsl",
                            "__text": "sans"
                          }
                          );                
            }

如果存在像 attribute-set [0] 这样的数组，我可以成功实现上述代码.如何检查单个对象.如果未找到，则push和一个数组将在 attribute-set [1] 吗?

推荐答案

在您的示例中，$scope.contentObj.stylesheet.attribute-set[0].attribute确实是一个数组，而$scope.contentObj.stylesheet.attribute-set[1].attribute是一个对象，该原型没有some()方法.我以为这只是一个错字，所以我将$scope.contentObj.stylesheet.attribute-set[1].attribute更改为一个数组，现在一切似乎都可以正常工作:

In your example $scope.contentObj.stylesheet.attribute-set[0].attribute is indeed an array, while $scope.contentObj.stylesheet.attribute-set[1].attribute is an object, which prototype does not have some() method. I assume it is just a typo, so I changed $scope.contentObj.stylesheet.attribute-set[1].attribute to be also an array and now everything seems to work properly:

const data = {
  "stylesheet": {
    "attribute-set": [
      {
        "attribute": [
          {
            "_name": "text-align",
            "__prefix": "xsl",
            "__text": "end"
          },
          {
            "_name": "end-indent",
            "__prefix": "xsl",
            "__text": "10pt"
          }
        ],
        "_name": "odd__header",
        "__prefix": "xsl"
      },     
      {
        "attribute": [
          {
            "_name": "font-weight",
            "__prefix": "xsl",
            "__text": "bold"
          },
          {
            "_name": "pagenum",
            "__prefix": "xsl"
          }
        ]  
      }
    ],
    "_xmlns:xsl": "http://www.w3.org/1999/XSL/Transform",
    "_xmlns:fo": "http://www.w3.org/1999/XSL/Format",
    "_version": "2.0",
    "__prefix": "xsl"
  }
}

const checkcontentPageFont = obj => obj._name === 'font-family';

const checkcontentPageFont_available = data.stylesheet["attribute-set"][1].attribute.some(checkcontentPageFont);

if (!checkcontentPageFont_available) {
  data.stylesheet["attribute-set"][1].attribute.push({
    "_name": "font-family",
    "__prefix": "xsl",
    "__text": "sans"
  });  
}

console.log(data);

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