How can I access a specific JSON object using its key?

Question

How can I access a specific JSON object using its key?

Consider the object below:

const ourObject = {
    "payload": {
        "streams": [
            {
                "children": {
                    "2165d20a-6276-468f-a02f-1abd65cad618": {
                        "additionalInformation": {
                            "narrative": {
                                "apple": "A",
                                "banana": "B"
                            },
                            "myInventory": {
                                "fruits": [
                                    {
                                        "name": "apple"
                                    },
                                    {
                                        "name": "banana"
                                    }
                                ]
                            }
                        }
                    }
                }
            }
        ]
    }
};

We have a task to locate the path of myInventory, however the uuid for children is dynamic. Do you have any suggestions on how we can find the path to myInventory by using it as a key and obtaining the JSON path?

javascript arrays json lodash

Answer 1

Answer №1

If you're dealing with dynamic elements, utilizing a programmatic key search can be beneficial

const ourObject = {
    "payload": {
        "streams": [
            {
                "children": {
                    "2165d20a-6276-468f-a02f-1abd65cad618": {
                        "additionalInformation": {
                            "narrative": {
                                "apple": "A",
                                "banana": "B"
                            },
                            "myInventory": {
                                "fruits": [
                                    {
                                        "name": "apple"
                                    },
                                    {
                                        "name": "banana"
                                    }
                                ]
                            }
                        }
                    }
                }
            }
        ]
    }
};

const getPath = (key, o) => {
  if (!o || typeof o !== "object") {
    return "";
  }

  const keys = Object.keys(o);
  for(let i = 0; i < keys.length; i++) {
    if (keys[i] === key ) {
      return key;
    }
    
    const path = getPath(key, o[keys[i]]);
    if (path) {
      return keys[i] + "." + path;
    }
  }
  return "";
};

const getValueForKey = (key, o) => {
  if (!o || typeof o !== "object") {
    return undefined;
  }

  const keys = Object.keys(o);
  for(let i = 0; i < keys.length; i++) {
    if (keys[i] === key ) {
      return o[key];
    }
    
    const value = getValueForKey(key, o[keys[i]]);
    if (value) {
      return value;
    }
  }
  return undefined;
}

console.log(getPath("myInventory", ourObject))
console.log(getValueForKey("myInventory", ourObject))

Answer 2

If you're dealing with dynamic elements, utilizing a programmatic key search can be beneficial

const ourObject = {
    "payload": {
        "streams": [
            {
                "children": {
                    "2165d20a-6276-468f-a02f-1abd65cad618": {
                        "additionalInformation": {
                            "narrative": {
                                "apple": "A",
                                "banana": "B"
                            },
                            "myInventory": {
                                "fruits": [
                                    {
                                        "name": "apple"
                                    },
                                    {
                                        "name": "banana"
                                    }
                                ]
                            }
                        }
                    }
                }
            }
        ]
    }
};

const getPath = (key, o) => {
  if (!o || typeof o !== "object") {
    return "";
  }

  const keys = Object.keys(o);
  for(let i = 0; i < keys.length; i++) {
    if (keys[i] === key ) {
      return key;
    }
    
    const path = getPath(key, o[keys[i]]);
    if (path) {
      return keys[i] + "." + path;
    }
  }
  return "";
};

const getValueForKey = (key, o) => {
  if (!o || typeof o !== "object") {
    return undefined;
  }

  const keys = Object.keys(o);
  for(let i = 0; i < keys.length; i++) {
    if (keys[i] === key ) {
      return o[key];
    }
    
    const value = getValueForKey(key, o[keys[i]]);
    if (value) {
      return value;
    }
  }
  return undefined;
}

console.log(getPath("myInventory", ourObject))
console.log(getValueForKey("myInventory", ourObject))

Answer 3

Answer №2

I'm not entirely certain if I have grasped the question correctly, however,

const uniqueID = '2165d20a-6276-468f-a02f-1abd65cad618';
ourObject.payload.streams[0].children[uniqueID].additionalInformation.myInventory

Answer 4

I'm not entirely certain if I have grasped the question correctly, however,

const uniqueID = '2165d20a-6276-468f-a02f-1abd65cad618';
ourObject.payload.streams[0].children[uniqueID].additionalInformation.myInventory

Answer 5

Answer №3

let keyToChange = Object.keys(myData["payload"]["streams"][0]["children"])[0]; 

console.log(myData["payload"]["streams"][0]["children"][keyToChange]["additionalInfo"]["inventoryAmount"]);

Answer 6

let keyToChange = Object.keys(myData["payload"]["streams"][0]["children"])[0]; 

console.log(myData["payload"]["streams"][0]["children"][keyToChange]["additionalInfo"]["inventoryAmount"]);

Answer 7

Answer №4

If you need to retrieve the UUID from a payload object efficiently, consider creating a helper function to do so. This approach offers close to O(1) lookup time, especially when dealing with objects that have only one key-value pair.

function extractUUID(payload) {
    let data = payload.streams[0].children;
    let uuid = Object.keys(data)[0];
    return uuid;
}

Usage Example:

const uniqueId = extractUUID(payload);
ourObject.payload.streams[0].children[uniqueId].additionalInformation.myInventory;

Answer 8

If you need to retrieve the UUID from a payload object efficiently, consider creating a helper function to do so. This approach offers close to O(1) lookup time, especially when dealing with objects that have only one key-value pair.

function extractUUID(payload) {
    let data = payload.streams[0].children;
    let uuid = Object.keys(data)[0];
    return uuid;
}

Usage Example:

const uniqueId = extractUUID(payload);
ourObject.payload.streams[0].children[uniqueId].additionalInformation.myInventory;

How can I access a specific JSON object using its key?

Answer №1

Answer №2

Answer №3

Answer №4

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