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Json – How retrieve a parent branch based on a value?

I have an array of Fruits. Each Fruit has a name and an array of countries. Each country has a name and a price.

How do I select all fruit names with a price of 12? i.e. go up a branch.

{
    "fruits": [
        {
            "name": "apple",
            "countries": [
                {
                    "name": "japan",
                    "price": "12"
                },
                {
                    "name": "iceland",
                    "price": "83"
                }
            ]
        },

        {
            "name": "oranges",
            "countries": [
                {
                    "name": "germany",
                    "price": "344"
                },
                {
                    "name": "italy",
                    "price": "99"
                }
            ]
        }
    ]
}
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2

Answers


  1. 0

    Nest a predicate within a predicate. The inner one selects countries that have price = "12" and the outer one selects the fruits with one or more countries that match that price.

    fruits[countries[price="12"]].name

    See https://try.jsonata.org/oGXY13U98

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  2. 0

    Use the ‘filter’ method to iterate through the fruit array and for each fruit, use ‘some’ method to check if array of its country has price of 12. By ‘some’ method, which return true for the match.
    Then use ‘map’ method to extract the filtered name.

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