Page Comparison

Issues and Decisions table

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Issue/Question

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Problem Statement

When a list is fetched using Get a node API then instead of returning a JSON list containing n-number of list items, the API returns each list item as individual JSON object. And each of these JSON objects have same name as the list name.

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[
    {
        "books": {
            "title": "Book 1",
            "lang": "N/A",
            "price": 11,
            "editions": [2009]
        }
    },
    {
        "books": {
            "title": "Book 2",        
            "lang": "German",
            "price": 39,
            "editions": [2007, 2013, 2021]
        }
    }
]

Associated problems

Impact on Delta Feature

The inconsistency described above extends to CPS Delta feature when using it to compare list nodes.

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So, when comparing JSON containing a list, to a list fetched from the data base, an inconsistent delta is generated because logically the JSON list supplied as input by the user is compared to the first JSON object of the same name, returned by the code. This comparison can be imagined as follows:

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{
    "books": [
      {
            "title": "Book 1",
            "lang": "N/A",
            "price": 11,
            "editions": [2009]
      },
      {
            "title": "Book 2",        
            "lang": "German",
            "price": 39,
            "editions": [2007, 2013, 2021]
      }
    ]
  }

...

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[
    {
        "books": {
            "title": "Book 1",
            "lang": "N/A",
            "price": 11,
            "editions": [2009]
        }
    },
    {
        "books": {
            "title": "Book 2",        
            "lang": "German",
            "price": 39,
            "editions": [2007, 2013, 2021]
        }
    }
]

Problem extends to root node xpath

This behavior extends to list items stored under root node as well. So, this case needs to be taken into consideration as well

Proposed Solution