# nk.matchList return empty

**URL:** <https://forum.heroiclabs.com/t/nk-matchlist-return-empty/3112>\
**Category:** Runtime Framework\
**Tags:** server-framework, typescript\
**Created:** [October 3, 2022, 9:06am UTC](https://forum.heroiclabs.com/t/nk-matchlist-return-empty/3112 "2022-10-03T09:06:09Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![nghiaht](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.heroiclabs.com/nghiaht/32/1331_2.png) [@nghiaht](https://forum.heroiclabs.com/u/nghiaht)\
**Post date:** [October 3, 2022, 9:06am UTC](https://forum.heroiclabs.com/t/nk-matchlist-return-empty/3112/1 "2022-10-03T09:06:09Z")

</div>

Hello,

I’m developing my Nakama server using TS runtime.  
I have a rpc `match.create` for creating a match, a rpc `match.search` for searching matches.  
Originally my `match.search` is complex with query by match labels inside, I use `nk.matchList` for searching but the results is empty anyway.  
So I simplify `nk.matchList` to use default filters, but the results is still empty. I could not figure out what’s wrong, please help.

What I expect is I firstly create a match, then using `nk.matchList` to search, the results should have at least 1 item - the match that I just created.  
I confirm that the created match is exist, by using `nk.matchGet` with the matchId from creating the match. But nk.matchList returns .

Here is my snippet:

```auto

// match.rpc.ts
export function rpcCreateMatch(
  context: nkruntime.Context,
  logger: nkruntime.Logger,
  nk: nkruntime.Nakama,
  payload: string
): string {
const matchId = nk.matchCreate("starter"); // I have a match handler named "starter" match for handling this
return JSON.stringify({matchId: matchId});
}

export function rpcSearchMatch(context: nkruntime.Context,
  logger: nkruntime.Logger,
  nk: nkruntime.Nakama,
  payload: string) {
const results = nk.matchList(10); // Limit 10, remaining filters default
return JSON.stringify({data: results});
}

// main.ts
initializer.registerRpc("match.create", rpcCreateMatch);
initializer.registerRpc("match.search", rpcSearchMatch);

// Here is my test using Jest, nakama js SDK
// test.spec.ts

const response1 = await user1.socket.rpc("match.create");
expect(JSON.parse(response1.payload!).matchId).toBeTruthy();

await sleep(1000);

const response2 = await user1.socket.rpc("match.search");
expect(JSON.parse(response2.payload!).results.length).toBeGreaterThan(0); // Test fail, the results length is 0

```

---

<div class="post-metadata">

**Author:** ![lugehorsam](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.heroiclabs.com/lugehorsam/32/314_2.png) [@lugehorsam](https://forum.heroiclabs.com/u/lugehorsam)\
**Post date:** [October 3, 2022, 4:27pm UTC](https://forum.heroiclabs.com/t/nk-matchlist-return-empty/3112/2 "2022-10-03T16:27:40Z")

</div>

Hey @nghiaht if you look at the developer console, do you see the match running? Is it possible your user is leaving the match before your `match.search` RPC finishes?

---

<div class="post-metadata">

**Author:** ![nghiaht](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.heroiclabs.com/nghiaht/32/1331_2.png) [@nghiaht](https://forum.heroiclabs.com/u/nghiaht)\
**Post date:** [November 26, 2022, 9:27am UTC](https://forum.heroiclabs.com/t/nk-matchlist-return-empty/3112/4 "2022-11-26T09:27:51Z")

</div>

The match is still running.  
My test is user1 create the match, then user2 call match.search (using nk.matchlist to find that old one) but the array is , you can see in the log (The line below - `Try to find existing matches...`)

```auto
{"level":"debug","ts":"2022-11-26T16:16:47.086+0700","caller":"server/session_ws.go:395","msg":"Sending *rtapi.Envelope_Rpc message","uid":"1a89360c-e7cd-4ae5-b495-1a5c7da4506e","sid":"0d464210-6d6b-11ed-b040-006100a0eb06","envelope":"cid:\"1\" rpc:{id:\"match.create\" payload:\"{\\\"data\\\":{\\\"matchId\\\":\\\"8c55e455-e49b-4ec1-aeb7-610f83a91228.nakama\\\"}}\"}"}
{"level":"debug","ts":"2022-11-26T16:16:47.087+0700","caller":"server/pipeline.go:65","msg":"Received *rtapi.Envelope_MatchJoin message","uid":"1a89360c-e7cd-4ae5-b495-1a5c7da4506e","sid":"0d464210-6d6b-11ed-b040-006100a0eb06","cid":"2","message":{"MatchJoin":{"Id":{"MatchId":"8c55e455-e49b-4ec1-aeb7-610f83a91228.nakama"}}}}
{"level":"debug","ts":"2022-11-26T16:16:47.088+0700","caller":"server/runtime_javascript_logger.go:104","msg":"\"1a89360c-e7cd-4ae5-b495-1a5c7da4506e\" attempted to join match, metadata: map[]","mid":"8c55e455-e49b-4ec1-aeb7-610f83a91228"}
{"level":"debug","ts":"2022-11-26T16:16:47.089+0700","caller":"server/runtime_javascript_logger.go:104","msg":"tlmn.handler - match join - instatiate TLMNDI","mid":"8c55e455-e49b-4ec1-aeb7-610f83a91228"}
{"level":"debug","ts":"2022-11-26T16:16:47.089+0700","caller":"server/tracker.go:907","msg":"Processing presence event","joins":1,"leaves":0}
{"level":"debug","ts":"2022-11-26T16:16:47.089+0700","caller":"server/session_ws.go:395","msg":"Sending *rtapi.Envelope_Match message","uid":"1a89360c-e7cd-4ae5-b495-1a5c7da4506e","sid":"0d464210-6d6b-11ed-b040-006100a0eb06","envelope":"cid:\"2\" match:{match_id:\"8c55e455-e49b-4ec1-aeb7-610f83a91228.nakama\" authoritative:true label:{value:\"{\\\"id\\\":\\\"8c55e455-e49b-4ec1-aeb7-610f83a91228.nakama\\\",\\\"status\\\":\\\"initial\\\",\\\"players\\\":[],\\\"leaderUserId\\\":null,\\\"gameplay\\\":\\\"tlmn\\\",\\\"competitive\\\":\\\"normal\\\",\\\"mode\\\":\\\"normal\\\",\\\"betGold\\\":10000}\"} self:{user_id:\"1a89360c-e7cd-4ae5-b495-1a5c7da4506e\" session_id:\"0d464210-6d6b-11ed-b040-006100a0eb06\" username:\"NR79LO\"}}"}
{"level":"debug","ts":"2022-11-26T16:16:47.089+0700","caller":"server/runtime_javascript_logger.go:104","msg":"\"1a89360c-e7cd-4ae5-b495-1a5c7da4506e\" request to join match","mid":"8c55e455-e49b-4ec1-aeb7-610f83a91228"}
{"level":"debug","ts":"2022-11-26T16:16:47.092+0700","caller":"server/pipeline.go:65","msg":"Received *rtapi.Envelope_Rpc message","uid":"f1d26365-fd35-48ae-b6c7-25082ebfe2ca","sid":"0d4cd0e4-6d6b-11ed-b040-006100a0eb06","cid":"1","message":{"Rpc":{"id":"match.create","payload":"{\"gameplay\":\"tlmn\",\"payload\":{\"maxPlayers\":2,\"gameplay\":\"tlmn\"},\"useExisting\":true}"}}}
{"level":"debug","ts":"2022-11-26T16:16:47.097+0700","caller":"server/runtime_javascript_logger.go:104","msg":"tlmn - handler - send state message: map[command:55 context:MatchPlayerJoin data:{\"competitive\":\"normal\",\"mode\":\"normal\",\"betGold\":10000,\"id\":\"8c55e455-e49b-4ec1-aeb7-610f83a91228.nakama\",\"status\":\"initial\",\"players\":[\"1a89360c-e7cd-4ae5-b495-1a5c7da4506e\"],\"leaderUserId\":\"1a89360c-e7cd-4ae5-b495-1a5c7da4506e\",\"gameplay\":\"tlmn\"} sender:SYS], receivers: <nil>","mid":"8c55e455-e49b-4ec1-aeb7-610f83a91228"}  
{"level":"debug","ts":"2022-11-26T16:16:47.099+0700","caller":"server/runtime_javascript_logger.go:104","msg":"@@@@@@@@@@@@@@ Try to find existing matches []","rpc_id":"match.create"}

```

Here is my recap implementation

```auto
export function createMatch(
  context: nkruntime.Context,
  logger: nkruntime.Logger,
  nk: nkruntime.Nakama,
  dto: CreateMatchInputDto
): CreateMatchResultDto {

if (dto.useExisting) {
  const existings = nk.matchList(10, true, null, 2, 4);
  logger.debug("@@@@@@@@@@@@@@ Try to find existing matches %v", existings); // Here result is empty
  if (existings?.[0]) {
    return { matchId: existings[0].matchId}
  }
}

// Fallback to create new one
const matchId = nk.matchCreate(TLMN_MODULE_NAME, props);

return {
  matchId: matchId,
};

}

```

Here is my jest test pseudocode

```auto
const user1;
const user2;

 const response1 = await user1.socket.rpc(
        rpcCreateMatchId, // match.create
        JSON.stringify({useExisting: false})
 );

const data1 = JSON.parse(
        String(response1.payload)
      ) as AppResponseDto<CreateMatchResultDto>;
      expect(data1.data.matchId).toBeDefined();

await user1.socket.joinMatch(data1.data.matchId);

const response2 = await user2.socket.rpc(
        rpcCreateMatchId, // match.create
        JSON.stringify({ useExisting: true })
);

const data2 = JSON.parse(
        String(response2.payload)
      ) as AppResponseDto<CreateMatchResultDto>;

expect(data2.data.matchId).toBe(data1.data.matchId); // Failed because another match is created
await user2.socket.joinMatch(data2.data.matchId);

```

---

<div class="post-metadata">

**Author:** ![justin](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.heroiclabs.com/justin/32/1702_2.png) [@justin](https://forum.heroiclabs.com/u/justin)\
**Post date:** [July 26, 2023, 1:20pm UTC](https://forum.heroiclabs.com/t/nk-matchlist-return-empty/3112/5 "2023-07-26T13:20:04Z")

</div>

did you solve this? facing similar issue

---

<div class="post-metadata">

**Author:** ![nghiaht](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.heroiclabs.com/nghiaht/32/1331_2.png) [@nghiaht](https://forum.heroiclabs.com/u/nghiaht)\
**Post date:** [July 27, 2023, 4:04am UTC](https://forum.heroiclabs.com/t/nk-matchlist-return-empty/3112/6 "2023-07-27T04:04:23Z")

</div>

Yes, I do.

In my test case, I tested so fast while the default match label update interval is 1000ms ( [Heroic Labs Documentation | Configuration](https://heroiclabs.com/docs/nakama/getting-started/configuration/#match.label_update_interval_ms)).

So please wait after that interval or change it. It it’s still incorrect, I think you should check the match query itself.