GODRIVER-2649 Add TODOs for passing readConcern correctly for RunCommand. (#1126)

Co-authored-by: Matt Dale <[email protected]>

Author: benjirewis

mongo/database.go

@@ -173,6 +173,10 @@ func (db *Database) processRunCommand(ctx context.Context, cmd interface{},
 	default:
 		op = operation.NewCommand(runCmdDoc)
 	}
+
+	// TODO(GODRIVER-2649): ReadConcern(db.readConcern) will not actually pass the database's
+	// read concern. Remove this note once readConcern is correctly passed to the operation
+	// level.
 	return op.Session(sess).CommandMonitor(db.client.monitor).
 		ServerSelector(readSelect).ClusterClock(db.client.clock).
 		Database(db.name).Deployment(db.client.deployment).ReadConcern(db.readConcern).

x/mongo/driver/operation/command.go

@@ -77,6 +77,7 @@ func (c *Command) Execute(ctx context.Context) error {
 		return errors.New("the Command operation must have a Deployment set before Execute can be called")
 	}
 
+	// TODO(GODRIVER-2649): Actually pass readConcern to underlying driver.Operation.
 	return driver.Operation{
 		CommandFn: func(dst []byte, desc description.SelectedServer) ([]byte, error) {
 			return append(dst, c.command[4:len(c.command)-1]...), nil