Incomplete List of Connections Returned

wlau — Wed, 21 Oct 2020 17:35:12 GMT

I have a Qlik load script where I am trying to execute a task in NPrinting. This script originated from Qlik and was working for awhile and then it stopped working. I went through the script in debug mode and narrowed it down to the step where a list of NPrinting connections was requested. I added an exit script right after the "RestConnectionMasterTable" was created to see what was in that table. As expected, I see the names of the NPrinting connections but its not a complete list. I did not find the connection that I was looking for. I went on the NPrinting server and checked that the connection existed. As a result, if I remove the exit script and let the reload continue, the connection id would be queried and used to build additional URLs. Since my connection did not exist in the table, any further REST calls will fail.

//GET the list of the connections contained in the NP App selected before
RestConnectionMasterTable:
SQL SELECT
"__KEY_data",
(SELECT
"id",
"name",
"appId",
"__FK_items"
FROM "items" FK "__FK_items")
FROM JSON (wrap off) "data" PK "__KEY_data"
WITH CONNECTION( URL "$(v_NPRINTING_URL)/api/v1/connections", HTTPHEADER "cookie" "$(vCookie)" );

[connection_items]:
LOAD [id] AS [connection_id],
[name] AS [connection_name],
[appId] AS [connection_appId]
RESIDENT RestConnectionMasterTable
WHERE NOT IsNull([__FK_items]) AND [appId] = '$(vAppId)' and upper([name]) = upper('$(v_CONN_NAME)');

//Extracts the desired Connection ID
let vConnectionId = Peek('connection_id',0,'connection_items');

IF NoOfRows('connection_items') = 0 then

TRACE ERROR >>>>> Connection ID Not Found;
//CALL ThrowError('Error: Connection ID Not Found')
Set TriggerError;
exit script;
end if

//Compose the URL for the POST call that triggers a reload metadata
let vReloadMetadataURL = '$(v_NPRINTING_URL)/api/v1/connections/'&'$(vConnectionId)'&'/reload';

//Compose the URL for the GET call that checks the connection status
let vConnectionStatusURL = '$(v_NPRINTING_URL)/api/v1/connections/'&'$(vConnectionId)';

DROP TABLE RestConnectionMasterTable;

Re: Incomplete List of Connections Returned

Lech_Miszkiewicz — Wed, 21 Oct 2020 22:05:18 GMT

Hi,

You are not using QueryLimit parameters in your REST queries which is likely the reason why you are not getting all connections.

Have a look at my NPrinting.qvs library : https://nprintingadventures.com/2019/04/08/nprinting-api-qlik-rest-subroutines/ where you will find examples of how it needs to be used to get full result set

Re: Incomplete List of Connections Returned

Lech_Miszkiewicz — Thu, 22 Oct 2020 06:51:16 GMT

by the way - query limit is the number of records you want to return from query. If you dont have this parameter only limited (I think 50) records are returned

Re: Incomplete List of Connections Returned

wlau — Thu, 22 Oct 2020 16:37:27 GMT

Thank you. That did the trick. We also added that parameter to other parts of the script such as the request to get lists for applications and tasks from NPrinting.

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Incomplete List of Connections Returned

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Re: Incomplete List of Connections Returned