Differences between lists of items and list of items-CodePudding

I was thinking about API path like .../lists/items?listId=1,2,3 to get a response like below.

// Map<Integer, List>
{
  1: [
    {
      "field": "item1"
    },
    {
      "field": "item11"
    }
  ],
  2: [
    {
      "field": "item2"
    },
    {
      "field": "item22"
    }
  ],
  3: [
    {
      "field": "item3"
    },
    {
      "field": "item33"
    }
  ]
}

// List<Object>
{
  [
    {
      "field": "item1"
    },
    {
      "field": "item11"
    },
    {
      "field": "item2"
    },
    {
      "field": "item22"
    },
    {
      "field": "item3"
    }
    {
      "field": "item33"
    },

  ]
}

But at the same time, I thought that the api path could be used to express to get following payload.

// List<List<Object>>
{
  [
    {
      "field": "item1"
    },
    {
      "field": "item11"
    }
  ], 
  [
    {
      "field": "item2"
    },
    {
      "field": "item22"
    }
  ],
  [
    {
      "field": "item3"
    },
    {
      "field": "item33"
    }
  ]
}

Is there correct answer for three cases above to write REST API path? If not, it would be appreciate to share your experience. Thanks.

CodePudding user response：

I'd use the first method.

The second is the worst, since you have to divide again the lists clientside, which is useless. JSON can send them separately
The third could be used, but you would have to recreate the connection id/list, since lists don't have a key.

The map method maintains the connection id/list and separate all the lists