Same issue like in scout:status

The `$model->toSearchableArray()` return empty array so all columns become indexed.

Author: thewebartisan7

src/Console/ImportCommand.php

@@ -43,13 +43,18 @@ public function handle(Dispatcher $events)
         $tnt->loadConfig($config);
         $tnt->setDatabaseHandle($db->getPdo());
 
+        if(!$model->count()) {
+            $this->info('Nothing to import.');
+            exit(0);
+        }
+        
         $indexer = $tnt->createIndex($model->searchableAs().'.index');
         $indexer->setPrimaryKey($model->getKeyName());
 
         $availableColumns = Schema::connection($driver)->getColumnListing($model->getTable());
         $desiredColumns = array_keys($model->toSearchableArray());
 
-        $fields = array_intersect($desiredColumns, $availableColumns);
+        $desiredColumns = array_keys($model->first()->toSearchableArray());
 
         $query = $db->table($model->getTable());