filter array accoring to its nested array value

Question

I have an array of results. I want to filter the results to an array whose categorys have at least one object with a cat_id of 1. How can I do that?

"results": [
  {
    "product_id": 1,
    "title": "booking",
    "draft": false,
    "publish": true,
    "category": [
      {
        "cat_id": 1,
        "cat_name": "web",
        "product": "booking"
      }
    ],
  },
  {
    "product_id": 2,
    "title": "reading",
    "draft": false,
    "publish": true,
    "category": [
      {
        "cat_id": 6,
        "cat_name": "android",
        "product": "asdasd"
      }
    ],
  },
  {
    "product_id": 3,
    "title": "reading",
    "draft": false,
    "publish": true,
    "category": [],
  },
]

My attempt:

for (let i = 0; i < data.results.length; i++) {
  this.webCatProducts = data.results[i].category.filter(d => d.cat_id == 1)
  console.log(this.webCatProducts)
}

yes it can be empty or have 3 objects that you can see above — devmrh
– devmrh, Commented May 28, 2018 at 5:18

CertainPerformance · Accepted Answer · 2018-05-28 05:18:59Z

3

Use .some inside the .filter to check to see if any of the category objects have a matchingcat_id:

const results=[{"product_id":1,"title":"booking","draft":!1,"publish":!0,"category":[{"cat_id":1,"cat_name":"web","product":"booking"}],},{"product_id":2,"title":"reading","draft":!1,"publish":!0,"category":[{"cat_id":6,"cat_name":"android","product":"asdasd"}],},{"product_id":3,"title":"reading","draft":!1,"publish":!0,"category":[],},];
const filtered = results.filter(
  ({ category }) => category.some(({ cat_id }) => cat_id === 1)
);
console.log(filtered);

answered May 28, 2018 at 5:18

CertainPerformance

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Comments

Trick Peeraz'e · Accepted Answer · 2018-05-28 05:27:20Z

0

You should do filter on product level results: [] and predicate matched with expected category’s id with nested find some like this; .filter(product => product.category.some(cat => cat.cat_id === 1)

Make sure that category is always an array otherwise you have to check more.

answered May 28, 2018 at 5:27

Trick Peeraz'e

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