如何按日期过滤嵌套的对象数组

Question

I have an array like this:

const data =  [
  {
    id: '3499934913',
    user_data: {
      user_data_stays: [
        {
          value: '30.0',
          date: '2021-10-01T12:55:00.000Z',
        },
        {
          value: '30.0',
          date: '2021-11-01T12:55:00.000Z',
        },
        {
          value: '30.0',
          date: '2021-13-01T12:55:00.000Z',
        }
      ],
    }
  },
  {
    id: '43534535',
    user_data: {
      user_data_stays: [
        {
          value: '30.0',
          date: '2021-11-01T12:55:00.000Z',
        },
        {
          value: '30.0',
          date: '2021-12-01T12:55:00.000Z',
        },
        {
          value: '30.0',
          date: '2021-13-01T12:55:00.000Z',
        }
      ],
    }
  },
]

How can I keep the structure of the whole array but filter in user_data_stays only those objects which date is equal to 2021-10-01T12:55:00.000Z ?

I tried using filter and some but I am not able to get to the nested element inside. I think the problem is the amount of nesting, and I can't deal with that. I would appreciate your help.

Answer 1

You could use forEach on the outer array and run filter method on inner array with the help of de-structuring, the object reference will update the outer object in-place.

 const data = [ { id: "3499934913", user_data: { user_data_stays: [ { value: "30.0", date: "2021-10-01T12:55:00.000Z" }, { value: "30.0", date: "2021-11-01T12:55:00.000Z" }, { value: "30.0", date: "2021-13-01T12:55:00.000Z" }, ], }, }, { id: "43534535", user_data: { user_data_stays: [ { value: "30.0", date: "2021-11-01T12:55:00.000Z" }, { value: "30.0", date: "2021-12-01T12:55:00.000Z" }, { value: "30.0", date: "2021-13-01T12:55:00.000Z" }, ], }, }, ]; data.forEach(({ user_data }) => { user_data.user_data_stays = user_data.user_data_stays.filter(({ date }) => date === '2021-10-01T12:55:00.000Z'); }); console.log(data);