copyDatasetToSpace relations collection UI Error

[taywll252]

Describe the bug
Our team received an error in the UI where we could not view a dataset or underlying folders. The error message said it was an error in GET /datasets/{id}

This was after trying out the copyDatasetToSpace endpoint through the UI feature and then deleting the newly copied dataset. This only affected the UI, where the GET datasets API works just fine.

Troubleshooting with Clowder devs resulted in figuring out the error had something to do with the relations collection in the database. We renamed the relations to relations_bak and retried accessing the dataset page. The error was no longer present.

To Reproduce
Steps to reproduce the behavior:

1. Copy a Dataset from one Space to another using the UI's provided copyDatasetToSpace functionality
2. Delete the newly copied Dataset
3. Navigate to the original Dataset's page or folders
4. See error

Expected behavior
A user is able to copy a dataset to another space and then delete the newly copied dataset without affecting the ability to view the original dataset or folders in the UI.

Traceback
Version: 1.20.2#889 branch:master sha1:68baf98f0a7635f9059c9856e2fa6b92781e308f
Request: GET /datasets/5e31dc1e99323f93a9f5cec0
Error: @84oo5p5m5: Execution exception in null:null at play.api.Application$class.handleError(Application.scala:293) at play.api.DefaultApplication.handleError(Application.scala:399) at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$13$$anonfun$apply$1.applyOrElse(PlayDefaultUpstreamHandler.scala:170) at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$13$$anonfun$apply$1.applyOrElse(PlayDefaultUpstreamHandler.scala:167) at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:33) at scala.util.Failure$$anonfun$recover$1.apply(Try.scala:185) at scala.util.Try$.apply(Try.scala:161) at scala.util.Failure.recover(Try.scala:185) at scala.concurrent.Future$$anonfun$recover$1.apply(Future.scala:324) at scala.concurrent.Future$$anonfun$recover$1.apply(Future.scala:324) at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) at play.api.libs.iteratee.Execution$$anon$1.execute(Execution.scala:43) at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40) at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248) at scala.concurrent.Promise$class.complete(Promise.scala:55) at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:153) at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:249) at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:249) at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) at play.api.libs.iteratee.Execution$$anon$2.execute(Execution.scala:70) at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40) at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248) at scala.concurrent.Promise$class.complete(Promise.scala:55) at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:153) at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:249) at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:249) at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) at play.api.libs.iteratee.Execution$$anon$2.execute(Execution.scala:70) at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40) at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248) at scala.concurrent.Promise$class.complete(Promise.scala:55) at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:153) at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:249) at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:249) at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) at play.api.libs.iteratee.Execution$$anon$2.execute(Execution.scala:70) at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40) at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248) at scala.concurrent.Promise$class.complete(Promise.scala:55) at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:153) at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:23) at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:42) at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:386) at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) Caused by: java.util.NoSuchElementException: None.get at scala.None$.get(Option.scala:313) at scala.None$.get(Option.scala:311) at controllers.Datasets$$anonfun$dataset$1$$anonfun$49.apply(Datasets.scala:617) at controllers.Datasets$$anonfun$dataset$1$$anonfun$49.apply(Datasets.scala:617) at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) at scala.collection.immutable.List.foreach(List.scala:318) at scala.collection.TraversableLike$class.map(TraversableLike.scala:244) at scala.collection.AbstractTraversable.map(Traversable.scala:105) at controllers.Datasets$$anonfun$dataset$1.apply(Datasets.scala:617) at controllers.Datasets$$anonfun$dataset$1.apply(Datasets.scala:487) at play.api.mvc.ActionBuilder$$anonfun$apply$10.apply(Action.scala:221) at play.api.mvc.ActionBuilder$$anonfun$apply$10.apply(Action.scala:220) at controllers.SecuredController$$anon$2.invokeBlock(SecuredController.scala:107) at play.api.mvc.ActionBuilder$$anon$1.apply(Action.scala:309) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:109) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:109) at play.utils.Threads$.withContextClassLoader(Threads.scala:18) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:108) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:107) at scala.Option.map(Option.scala:145) at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:107) at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:100) at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:481) at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:481) at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:517) at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:517) at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$13.apply(Iteratee.scala:493) at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$13.apply(Iteratee.scala:493) at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) ... 6 more

[taywll252]

@lmarini Here is the ticket you requested I submit and you could add context to.