Participants API endpoint not working in 3.3

Software Support
1

Hi @NateWr,

im hijacking this thread since my question is related to your answer. Our team is currently testing out ojs 3.4s API functionality: when we tried the submissions/{sub_id}/participants/{stage_id} API endpoint on OJS 3.3, it wasn’t functional. In OJS 3.4 however, it works perfectly fine.

My Question: are the endpoints in the 3.3 API Documentation really only useful for OJS 3.4? And if not, does any API Documentation exist for OJS 3.4 and does OJS 3.4 include any new endpoints?

Kind Regards and thank you for your help,

Max

2

Hi @Max358, the API documentation at https://docs.pkp.sfu.ca/dev/api/ojs/3.3 should reflect 3.3. We don’t usually publish API documention for an unreleased version until we reach the Release Candidate phase.

Can you provide a record of the HTTP request/response and any related error logs to help us debug your request?

3

Hi @NateWr,

if i try to access submissions/{sub_id}/participants/{stage_id} in OJS 3.3.0.7, i get a Slim Application Error in the browser window. The api endpoint responds with a 500 internal server error.
The /php-fpm logs show the following stack trace:

 Slim Application Error:
Type: Exception
Message: DAOResultFactory instances cannot be counted unless supplied in constructor (DAO UserDAO)!
File: /var/www/html/lib/pkp/classes/db/DAOResultFactory.inc.php
Line: 101
Trace: #0 /var/www/html/lib/pkp/classes/db/DAOResultIterator.inc.php(83): DAOResultFactory->getCount()
#1 /var/www/html/lib/pkp/api/v1/submissions/PKPSubmissionHandler.inc.php(473): DAOResultIterator->count()
#2 [internal function]: PKPSubmissionHandler->getParticipants(Object(Slim\Http\Request), Object(APIResponse), Array)
#3 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php(40): call_user_func(Array, Object(Slim\Http\Request), Object(APIResponse), Array)
#4 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/Route.php(281): Slim\Handlers\Strategies\RequestResponse->__invoke(Array, Object(Slim\Http\Request), Object(APIResponse), Array)
#5 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\Route->__invoke(Object(Slim\Http\Request), Object(APIResponse))
#6 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/Route.php(268): Slim\Route->callMiddlewareStack(Object(Slim\Http\Request), Object(APIResponse))
#7 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/App.php(503): Slim\Route->run(Object(Slim\Http\Request), Object(APIResponse))
#8 /var/www/html/lib/pkp/classes/security/authorization/internal/ApiAuthorizationMiddleware.inc.php(77): Slim\App->__invoke(Object(Slim\Http\Request), Object(APIResponse))
#9 [internal function]: ApiAuthorizationMiddleware->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Slim\App))
#10 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array(Object(ApiAuthorizationMiddleware), Array)
#11 [internal function]: Slim\DeferredCallable->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Slim\App))
#12 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(APIResponse), Object(Slim\App))
#13 /var/www/html/lib/pkp/classes/security/authorization/internal/ApiCsrfMiddleware.inc.php(46): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(APIResponse))
#14 [internal function]: ApiCsrfMiddleware->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#15 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array(Object(ApiCsrfMiddleware), Array)
#16 [internal function]: Slim\DeferredCallable->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#17 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#18 /var/www/html/lib/pkp/classes/security/authorization/internal/ApiTokenDecodingMiddleware.inc.php(121): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(APIResponse))
#19 [internal function]: ApiTokenDecodingMiddleware->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#20 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array(Object(ApiTokenDecodingMiddleware), Array)
#21 [internal function]: Slim\DeferredCallable->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#22 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#23 /var/www/html/lib/pkp/classes/handler/APIHandler.inc.php(68): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(APIResponse))
#24 [internal function]: APIHandler->{closure}(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#25 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array(Object(Closure), Array)
#26 [internal function]: Slim\DeferredCallable->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#27 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#28 /var/www/html/lib/pkp/classes/handler/APIHandler.inc.php(127): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(APIResponse))
#29 [internal function]: APIHandler->{closure}(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#30 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array(Object(Closure), Array)
#31 [internal function]: Slim\DeferredCallable->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#32 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#33 /var/www/html/lib/pkp/classes/handler/APIHandler.inc.php(132): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(APIResponse))
#34 [internal function]: APIHandler->{closure}(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#35 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array(Object(Closure), Array)
#36 [internal function]: Slim\DeferredCallable->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#37 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#38 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(APIResponse))
#39 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/App.php(392): Slim\App->callMiddlewareStack(Object(Slim\Http\Request), Object(APIResponse))
#40 /var/www/html/lib/pkp/classes/handler/APIHandler.inc.php(124): Slim\App->process(Object(Slim\Http\Request), Object(APIResponse))
#41 [internal function]: APIHandler->{closure}(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#42 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array(Object(Closure), Array)
#43 [internal function]: Slim\DeferredCallable->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#44 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#45 /var/www/html/lib/pkp/classes/handler/APIHandler.inc.php(132): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(APIResponse))
#46 [internal function]: APIHandler->{closure}(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#47 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/DeferredCallable.php(57): call_user_func_array(Object(Closure), Array)
#48 [internal function]: Slim\DeferredCallable->__invoke(Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#49 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(70): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(APIResponse), Object(Closure))
#50 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\App->Slim\{closure}(Object(Slim\Http\Request), Object(APIResponse))
#51 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/App.php(392): Slim\App->callMiddlewareStack(Object(Slim\Http\Request), Object(APIResponse))
#52 /var/www/html/lib/pkp/lib/vendor/slim/slim/Slim/App.php(297): Slim\App->process(Object(Slim\Http\Request), Object(APIResponse))
#53 /var/www/html/lib/pkp/classes/core/APIRouter.inc.php(115): Slim\App->run()
#54 /var/www/html/lib/pkp/classes/core/Dispatcher.inc.php(144): APIRouter->route(Object(Request))
#55 /var/www/html/lib/pkp/classes/core/PKPApplication.inc.php(362): Dispatcher->dispatch(Object(Request))
#56 /var/www/html/index.php(68): PKPApplication->execute()
#57 {main}
View in rendered output by enabling the "displayErrorDetails" setting.
4

Thanks @Max358! I was able to reproduce the bug and I’ve filed an issue: Stage participants API request fails · Issue #8055 · pkp/pkp-lib · GitHub.

You can follow that issue for any updates on a fix.

5

Hey @NateWr,

thanks for your efforts and for the heads up!

Kind Regards,
Max

6

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