How to get info from JSON response?

ljp1203 · January 2013

Hi everyone,

I need some help. I want to know how to get data from a JSON response. I want to make the objectId of the user, their username. But I don't know how to do this. I am also using Parse.

Thanks.
-Landon

zvardin · January 2013

This thread: http://www.giderosmobile.com/forum/discussion/144/proof-of-concept-conversion-of-3rd-party-box2d-editor-json-output-to-lua#Item_8

Mentions reading JSON using: http://json.luaforge.net/

Also, just in case it wasn't dummy data, your screen shows password information.

ljp1203 · January 2013

@zvardin

Thanks for the help. That was dummy data, so it will be changed. With this post that you gave me, will I be able to make the objectId that you see at the bottom the end part of the url like this:

			local data = {
				username = "hex",
				password = "ahex3z",
				firstName = "Al",
				lastName = "Hec",
				email = "alh1@hotmail.com"
			}
 
			local body = Json.Encode(data)
                        local user = objectId -- I want user to be the objectId from the response of the Json.  How would I get the objectId you see in the picture in my last post?
 
 
			-- Call load the url
			local url = baseUrl .. "/1/users" .. user --This is what I want it to look like.
			local urlLoader = UrlLoader.new(url, UrlLoader.POST, headers, body)

Thanks hopefully you can help me with this!
-Landon

zvardin · January 2013

Maybe I'm not sure what you're asking, but if you have an ID in the JSON object, I don't see why you couldn't retrieve it and add it on to the end of your URL.

ljp1203 · January 2013

@zvardin

How would I retrieve it?

Thanks.
-Landon

zvardin · January 2013

I believe when you handle the COMPLETE event for the URLLoader you can get event.data and then use that JSON library like so:

local data = json.decode(event.data)
--data.objectID (or whatever you've called it should then have the information)

ljp1203 · January 2013

@zvardin

That didn't work, it made the player crash

Would you like me to attach the project file to allow you to see whats going on?

Thanks.
-Landon

ar2rsawseen · January 2013

@ljp1203 crashed with what error?

1) You need to make sure you have json library added to decode the data
By looking at your example, you'd probably need to use

local data = Json.Decode(event.data)
--and not
--json.decode(event.data)

2) put print(event.data) statement before decoding to make sure you receive correct data
3) Do you really can send body data as json encoded string? Just curious haven't tried that

ljp1203 · January 2013

@ar2rsawseen

It doesn't even give me an error. It just closes the player and puts me back on the homescreen. Also, would you like me to add the project file so you can take a look at what's going on?

I'm also using Parse, if that helps

Thanks.
-Landon

zvardin · January 2013

Here's a simple test attached that works. There may be complications if you're trying to use Parse etc. You need to make sure you're getting json data back and how it's being named.

zvardin · January 2013

You may want to look into adding the api for Parse into this library:

http://www.giderosmobile.com/forum/discussion/1069/kinvey-firebase-added-to-gideros-rest-api-library

ljp1203 · January 2013

@zvardin

Thanks for the test project. I won't be able test it until I get home from school today at 4 PM EST.

Also, how would I add Parse's API to the library stated above?

Sorry about asking these questions, I just don't really understand fully the server side of apps.

Thanks again!
-Landon

zvardin · January 2013

I haven't added one myself, I had experimented with one @ndoss was nice enough to have added himself (Kinvey). But basically you're able to define the API in a text file, you could probably look at Kinvey and others that are already defined and use Parse's API documentation to define the functions you need. It shouldn't be too bad since you will probably only need a handful of actual API calls I would assume.

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