liveQuery dosn't work.

[zenz]

It dosn't work.
While I use :
LiveQuery liveQuery = LiveQuery();
await liveQuery.subscribe(query);

It will bring me this error:
NoSuchMethodError (NoSuchMethodError: The method 'contains' was called on null.

in the parse_live_query.dart file, it seems the object was not exist.

Originally posted by @zenz in #165 (comment)

[RodrigoSMarques]

@zenz
See this example.

    QueryBuilder<ParseObject> query =
        QueryBuilder<ParseObject>(ParseObject('TestAPI'))
          ..whereEqualTo('intNumber', 1);
    await liveQuery.subscribe(query);

Livequery needs to receive a QueryBuilder which is the query you want to monitor

[phillwiggins]

@zenz
It looks as though you haven't provided your liveQueryURL upon instantiation.

Parse().initialize( ApplicationConstants.keyApplicationId, ApplicationConstants.keyParseServerUrl, liveQueryUrl: ApplicationConstants.keyLiveQueryUrl);

This should fix your issue.

[zenz]

@phillwiggins Thanks but it dosn't work.

here's my code.

Parse().initialize(keyParseApplicationId, keyParseServerUrl,
        liveQueryUrl: keyLiveQueryUrl, debug: true);

      QueryBuilder<ParseObject> query =
          QueryBuilder<ParseObject>(ParseObject('Diet_Plans'));
      LiveQuery liveQuery = LiveQuery();

      await liveQuery.subscribe(query);

      liveQuery.on(LiveQueryEvent.update, (value) {
        print('*** UPDATE ***: ${DateTime.now().toString()}\n $value ');
        print((value as ParseObject).objectId);
        print((value as ParseObject).updatedAt);
        print((value as ParseObject).createdAt);
        print((value as ParseObject).get('objectId'));
        print((value as ParseObject).get('updatedAt'));
        print((value as ParseObject).get('createdAt'));
      });

and keyLiveQueryUrl = "wss://myhost:myport/mypath"
and I can confirm LiveQuery Server working properly.

Parse Server :3.4.0

[phillwiggins]

Which version of the library are you using? Judging by your comment and your code, the variable liveQueryUrl is null. Obviously, this should be checked so that it doesn't throw a null pointer but in the mean time, that seems to be the obvious issue.

…

On Tue, 28 May 2019 at 15:21, Zenz ***@***.***> wrote: @phillwiggins <https://github.com/phillwiggins> Thanks but it dosn't work. here's my code. Parse().initialize(keyParseApplicationId, keyParseServerUrl, liveQueryUrl: keyLiveQueryUrl, debug: true); QueryBuilder<ParseObject> query = QueryBuilder<ParseObject>(ParseObject('Diet_Plans')); LiveQuery liveQuery = LiveQuery(); await liveQuery.subscribe(query); liveQuery.on(LiveQueryEvent.update, (value) { print('*** UPDATE ***: ${DateTime.now().toString()}\n $value '); print((value as ParseObject).objectId); print((value as ParseObject).updatedAt); print((value as ParseObject).createdAt); print((value as ParseObject).get('objectId')); print((value as ParseObject).get('updatedAt')); print((value as ParseObject).get('createdAt')); }); and keyLiveQueryUrl = "wss://myhost:myport/mypath" and I can confirm LiveQuery Server working properly. Parse Server :3.4.0 — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#177>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AB4CPXQ4HWYEFUPKY4YNNKDPXU5XRANCNFSM4HQCXVAQ> .

-- Kind Regards Phill Wiggins [email protected]

[RodrigoSMarques]

What is not working? Is the error message displayed?
Did you check if the Diet_Plans class is configured on the server for LiveQuery?
https://docs.parseplatform.org/parse-server/guide/#live-queries

[zenz]

dev_dependencies:
parse_server_sdk: ^1.0.21

It seems that Parse().initialize not working well with liveQueryUrl parameter.

So LiveQuery liveQuery = LiveQuery(); makes _client.data.liveQueryURL equals to null.
While I hard coding _client.data.liveQueryURL to correct url, then I met the _session is null issue.

[zenz]

@RodrigoSMarques first thing first. It's not an issue about LiveQuery Server configuration. it's an issue about Parse.Init process.

[RodrigoSMarques]

My code works for me.

Internally it switches from https to wss or http to ws

  Parse().initialize("xxxxxxxxDmPTmRjfoSwpTPPmGsPUMKYxxxxx",
      "https://api.XXXXXXXXXXXXX.com/1",
      clientKey: "XXXi3GejX3SIxpDgSbKHHV8uHUUP3QGiPPTlxxxx",
      autoSendSessionId: true,
      debug: false,
      liveQueryUrl: "https://api.XXXXXXXXXXXXX.com/1");

[RodrigoSMarques]

Enable debug mode e put the execution log.

[zenz]

Sorry, it's my fault!
I just test the liveQuery code by modify the examples and didn't notice that the new example move the real Parse().initialize to another page. so this two initialize conflict. and create this issue.
It can be close now.

[zenz]

But as a suggestion, should we add a initialized state in Parse object so that we cannot re-initialize it again?