How to create nested array in realm without key(React Native)

Question

{
    "a": [
        [
            {
              "_id": "57e55b64016c3551c025abc1",
              "title": "Main Campus"
            },
            {
              "_id": "5810e2e27064497f74ad4874",
              "title": "Ahm Campus"
            },
            {
              "_id": "5d5d2633a1d0680620ac3cce",
              "title": "Baroda"
            },
            {
              "_id": "5d5d3af3a1d0680620ac3ef8",
              "title": "India"
            }
          ],
          [
            {
              "_id": "57e55b64016c3551c025abc1",
              "title": "Main Campus"
            },
            {
              "_id": "5810e2e27064497f74ad4874",
              "title": "Ahm Campus"
            },
            {
              "_id": "5d5d2633a1d0680620ac3cce",
              "title": "Baroda"
            },
            {
              "_id": "5d5d3af3a1d0680620ac3ef8",
              "title": "India"
            }
          ]

    ]
  }

How to create the schema in the realm(React native) for this type of JSON object. I tried all possible ways but did not found any specific solution. Basically, it is a nested array where the second array does not have any specific key(I tried with key it works fine but I want to do it without adding key).

Answer 1

You can use something like:

const ParentSchema = {
  name: "parent",
  properties: {
    key: "string",
    values: "Value[]"
  }
};

const ValueSchema = {
  name: "Value",
  embedded: true,
  properties: {
    _id: "string",
    title: "string"
  }
};

You can insert objects like:

realm.write(() => {
  realm.create("Parent", { key: "a", values: [
      { _id: "57e55b64016c3551c025abc1", title: "Main Campus" },
      { _id: "5810e2e27064497f74ad4874", title: "Ahm Campus" }
    ]
  });
});

Documentation: https://docs.mongodb.com/realm/node/data-model