Fix Provider must not be accessed error

src/Command/GenerateNovaCommand.php

@@ -61,6 +61,10 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             ? Xeed::getInstance()->attach()->getTables()
             : Xeed::getInstance()->attach($table)->getTables();
 
+        $tables = array_filter($tables, function ($table) {
+            return ! in_array($table, Xeed::LARAVEL_DEFAULT_TABLES);
+        });
+
         foreach ($tables as $table) {
             try {
                 NovaResourceGenerator::make($table)->run(force: $force);

src/Laravel/Commands/GenerateNovaCommand.php

@@ -5,6 +5,7 @@
 use Cable8mm\Xeed\Generators\NovaResourceGenerator;
 use Cable8mm\Xeed\Xeed;
 use Illuminate\Console\Command;
+use Illuminate\Support\Facades\DB;
 
 class GenerateNovaCommand extends Command
 {
@@ -34,8 +35,8 @@ public function handle(Xeed $xeed)
         $table = $this->option('table');
 
         $tables = is_null($table)
-            ? Xeed::getInstance()->attach()->getTables()
-            : Xeed::getInstance()->attach($table)->getTables();
+            ? $xeed->addPdo(DB::connection()->getPDO())->attach()->getTables()
+            : $xeed->addPdo(DB::connection()->getPDO())->attach($table)->getTables();
 
         $tables = array_filter($tables, function ($table) {
             return ! in_array($table, Xeed::LARAVEL_DEFAULT_TABLES);

tests/Laravel/Commands/GenerateNovaCommandTest.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Cable8mm\Xeed\Tests\Laravel\Commands;
+
+class GenerateNovaCommandTest extends \Orchestra\Testbench\TestCase
+{
+    public function test_execute_xeed_database_command()
+    {
+        $this->artisan('xeed:nova')->assertSuccessful();
+    }
+
+    public function test_execute_xeed_database_command_with_table()
+    {
+        $this->artisan('xeed:nova')->assertSuccessful();
+    }
+
+    protected function getPackageProviders($app)
+    {
+        return [
+            'Cable8mm\Xeed\Laravel\XeedServiceProvider',
+        ];
+    }
+}