How to construct Parse Objects from JSONs while maintaining createdAt values?

CastAsHuman · September 21, 2020, 10:07pm

I have JSONs like this;

{
    createdAt: a_date,
    text: "some text",
    likes: 8
}

And I want to convert them into PFObjects… here’s how I do it;

let post = PFObject(className: "Post", dictionary: jsonPost)

The thing is that after that, the PFObject doesn’t have a value at its createdAt property.
post.createdAt <== this is always nil

Any idea why?

davimacedo · September 21, 2020, 11:24pm

I am not sure, but you have trying by passing _created_at instead?

CastAsHuman · September 22, 2020, 11:38am

I just tried that and it crashed again

davimacedo · September 22, 2020, 11:41pm

I believe you need to pass { __type: “Date”, iso: “the date” } instead of the Date directly

CastAsHuman · September 23, 2020, 11:32am

Still nothing… you meant like this, right?

post["_created_at"] = ["__type": "Date", "iso": "2020-09-23T13:31:08.877Z"]
return PFObject(className: "Post", dictionary: post)

davimacedo · September 23, 2020, 10:46pm

Yes. Have you tried both _created_at and createdAt?

CastAsHuman · September 24, 2020, 12:32pm

Yes I have and it still remains nil

CastAsHuman · September 24, 2020, 12:50pm

Also I found out that the objectId property is also nil. I tried this, but didn’t do anything;

post["_id"] = post["objectId"] as? String

cbaker6 · September 25, 2020, 5:05am

It seems the key’s you are trying to set, createdAt, objectId, are protected keys. These are usually only hydrated from the parse-server.