Read and push object in another object without array

Question

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

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"
  }
}

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.

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].

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"
                          }
                          );                
            }

I can successfully implementing the above code if there is an array like attribute-set[0]. How can I check this for single object. If not found push and an array will be created on attribute-set[1] ?

Andriy · Accepted Answer · 2019-02-13 08:09:51Z

0

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);

answered Feb 13, 2019 at 8:09

Andriy

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2 Comments

WhoAmI Over a year ago

Have you modified the JSON manually ? If, so then it's wrong because the JSON is generating from other source. Bdw I have solved this issue. Thanks for you answer

Andriy Over a year ago

Yes, I modified manually, assuming that both stylesheet.attribute-set[0].attribute and stylesheet.attribute-set[1].attribute should be of the same format: arrays. In your question the firs is array, but the second one is an object.

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