Parse.Object.fromJSON creates empty record in DB

[andrekosak]

SDK package version: 1.10.0

When I use Parse.Object.fromJSON on NodeJS server, record are being created containing only objectId, createdAt, updatedAt. All other properties i have passed in my JSON are being ignored.

In the example below I am trying to create an object with properties a and b, but they are not being passed to server. At first I create an object and then getting this object by its ID to see if it has my properties.

Here is my code:

const testObject = {
    a: 1,
    b: 2,
    className: 'TestOnly1'
}
const test = Parse.Object.fromJSON(testObject);
test.save()
    .then((newObject) => {
        console.log(JSON.stringify(newObject, null, 3));

        const query = new Parse.Query('TestOnly1')
        query.get(newObject.id)
            .then((queryResponse) => {
                console.log(JSON.stringify(queryResponse, null, 3));
            })
    });

console output from first console.log():

{
   "a": 1,
   "b": 2,
   "createdAt": "2017-09-19T09:48:58.174Z",
   "updatedAt": "2017-09-19T09:48:58.174Z",
   "objectId": "fqJV15MOLK"
}

output from second console.log():

{
   "createdAt": "2017-09-19T09:48:58.174Z",
   "updatedAt": "2017-09-19T09:48:58.174Z",
   "objectId": "fqJV15MOLK"
}

Is it a bug or i am doing something wrong?

[dplewis]

I saw this as well. Look like fromJSON wasn't designed to save data.

• save only works on dirty fields i.e obj.set() that have yet to be committed and not in the cache.
• fromJSON saves fields in the cache.
• Your example ends up with no dirty fields to be saved since all the data is cache.
• save.then(newObject) just returning what was in the cache

@flovilmart Is this by design or for offline use?

[flovilmart]

I’m not sure, i’ll Have to investigate more, starting with when it was added :)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[francojohnc]

I check the code and no set called from parse object

static fromJSON(json
  /*: any*/
  , override
  /*:: ?: boolean*/
  ) {
    if (!json.className) {
      throw new Error('Cannot create an object without a className');
    }

    const constructor = classMap[json.className];
    const o = constructor ? new constructor() : new ParseObject(json.className);
    const otherAttributes = {};

    for (const attr in json) {
      if (attr !== 'className' && attr !== '__type') {
        otherAttributes[attr] = json[attr];
      }
    }

    if (override) {
      // id needs to be set before clearServerData can work
      if (otherAttributes.objectId) {
        o.id = otherAttributes.objectId;
      }

      let preserved = null;

      if (typeof o._preserveFieldsOnFetch === 'function') {
        preserved = o._preserveFieldsOnFetch();
      }

      o._clearServerData();

      if (preserved) {
        o._finishFetch(preserved);
      }
    }

    o._finishFetch(otherAttributes);

    if (json.objectId) {
      o._setExisted(true);
    }

    return o;
  }