Live-queries not responding running Quasar (vue) with Parse plattform

Parse Server 📡
1

I have a parse server running on digital ocean connected with my quasar framework.

Im trying to get my livequerys to work on my parse server. This is what I have done:

  1. ssh into digital ocean and added the class for the livequery in mine docker file:

    - PARSE_SERVER_LIVE_QUERY={"classNames":["MyClass"]}

  2. Init the subscription in created as below. Subscription prints at opening as it should but when I manually edit something in my parseserver nothing prints in the console. I expected it should print every time something changes in the database.

  created: function() {
    this.initSubscription();
  },

  methods: {
    initSubscription: async function() {
      const MyClass= parse.Object.extend("MyClass");
      const query = new parse.Query(MyClass);
      // do a bit of filtering so only display row where the column "myColumn" matches "thisValue"
      query.equalTo("myColumn", "thisValue");

      // create a subscription
      let subscription= await query.subscribe();
      
      // THIS PRINTS
      subscription.on("open", () => {
        console.log("subscription opened");
      });

      // BUT NONE OF THESE WORKS WHEN MANUALLY CHANGING IN DATABASE
      subscription.on("create", object => {
        console.log("object created", object);
      });
      subscription.on("update", object => {
        console.log("object updated", object);
      });
      subscription.on("enter", object => {
        console.log("object entered", object);
      });
    },

What am I doing wrong?

I had this guide as reference

2

Your query is query but below that you are using queryWand

queryWand.equalTo("myColumn", "thisValue");

3

Are you manually changing items in mongo or are you using another client / Parse Dashboard to do so?

4

Oh. Just a typo. I rewrote it a bit for the forumpost. It edited my post

5

I do it manually by ssh into my docker

6

İf you directly modify objects in database livequery doesn’t work. Objects needs to be created/updated through parse server. Also if you are using multiple parse servers behind a load balancer you need to use redis server. Try modify/create objects with dashboard

7

I restarted everything and now it works! I changed the values using the dashboard. Thanks!

8

Hello @uzaysan ,

I met similar issues: Parse Live Query sometimes doesn’t trigger Create, Update event, while sometimes it works.

I used Parse Server version 5, one parse server on a single physical machine, with only pm2, no other load balancers. Will such situation get the same issue? Should I use redis server for it?

Great thanks!

Best regards, Jason

9

How many instances does PM2 running in the machine? If the answer is more than one then answer is yes. Each instance needs a way to communicate with each other. You need to use Redis.

10

Hi @uzaysan ,

By PM2 instances, you mean the number of CPUs managed in the PM2? The number of CPUs is 8. But actually now I have configured the redis server, still not works as expected…

Is there any way I could check the log of running status of live query along with its redis?

I also created a standalone post here:

Thanks a lot.