SERVER-59585 Fix invalid cast on config servers

ReshardingOpObserver is enabled on both --configsvrs and --shardsvrs.
However, config servers use CollectionShardingStateStandalone rather
than CollectionShardingRuntime and means calling
CollectionShardingRuntime::get() on a config server is incorrect.
Instead, use CollectionShardingState::get() to retrieve the information
without a cast.

Also, update test_resharding_test_fixture_detects_unowned_docs.js to
specify a shard version when performing its insert so that the
collection is considered to be sharded by the ReshardingOpObserver when
using the CollectionShardingState interface.

1 files changed, 3 insertions, 5 deletions

diff --git a/src/mongo/db/s/resharding/resharding_op_observer.cpp b/src/mongo/db/s/resharding/resharding_op_observer.cpp
index 0027b9e0d62..5e1449a383e 100644
--- a/src/mongo/db/s/resharding/resharding_op_observer.cpp
+++ b/src/mongo/db/s/resharding/resharding_op_observer.cpp
@@ -70,17 +70,15 @@ void assertCanExtractShardKeyFromDocs(OperationContext* opCtx,
                                       const NamespaceString& nss,
                                       std::vector<InsertStatement>::const_iterator begin,
                                       std::vector<InsertStatement>::const_iterator end) {
-    const auto metadata = CollectionShardingRuntime::get(opCtx, nss)->getCurrentMetadataIfKnown();
+    const auto collDesc = CollectionShardingState::get(opCtx, nss)->getCollectionDescription(opCtx);
     // A user can manually create a 'db.system.resharding.' collection that isn't guaranteed to be
     // sharded outside of running reshardCollection.
     uassert(ErrorCodes::NamespaceNotSharded,
             str::stream() << "Temporary resharding collection " << nss.toString()
                           << " is not sharded",
-            metadata && metadata->isSharded());
-
-    auto chunkManager = *metadata->getChunkManager();
-    const auto& shardKeyPattern = chunkManager.getShardKeyPattern();
+            collDesc.isSharded());
 
+    const ShardKeyPattern shardKeyPattern(collDesc.getKeyPattern());
     for (auto it = begin; it != end; ++it) {
         shardKeyPattern.extractShardKeyFromDocThrows(it->doc);
     }