Question 246065 in Javascript Question posted in
A very good W3school tutorial can be found here.

Javascript – How to get a specific item from JSON?

I have a collection in a JSON file, when I access it by http://localhost:5000/product/ I see it, but when I try to get a specific product from it, like http://localhost:5000/product/1 I see nothing but [], what could be a possible solution to this?

I expect the output of http://localhost:5000/product/1 to be
{
"Id": 1,
"name": "Milk",
"Quantity": 100,
"Unit_coast": 2000
}

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2

Answers


  1. 0

    create get productById new API end point

    the logic :

    function getProductById(productId) {
  const filteredProducts = products.filter(item => item.Id === productId);
  return filteredProducts;
}
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  2. 0

    jsut note that the filter method will always return an array – ieither use an index or use find()

    as per Berlin Johns. M answer – but with an index on the return

    function getProductById(productId) {
  const filteredProducts = products.filter(item => item.Id === productId);
   return filteredProducts[0];
 }

    or use find to return the indidivudal item

    function getProductById(productId) {
   return products.find(item => item.Id === productId);
}

    and if you want to use more current arrow function

    getProductById(productId) => products.find(item => item.Id === productId)
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