fix

app/Http/Livewire/Server/Form.php

@@ -51,6 +51,10 @@ class Form extends Component
     }
     public function delete()
     {
+        if (!$this->server->isEmpty()) {
+            $this->emit('error', 'Server has defined resources. Please delete them first.');
+            return;
+        }
         $this->server->delete();
         redirect()->route('dashboard');
     }

app/Models/Server.php

@@ -14,6 +14,9 @@ class Server extends BaseModel
                 'server_id' => $server->id,
             ]);
         });
+        static::deleting(function ($server) {
+            $server->settings()->delete();
+        });
     }
     protected $fillable = [
         'name',
@@ -33,6 +36,19 @@ class Server extends BaseModel
     {
         return $this->extra_attributes->modelScope();
     }
+    public function isEmpty()
+    {
+        if ($this->applications()->count() === 0) {
+            return true;
+        }
+        return false;
+    }
+    public function applications()
+    {
+        return $this->destinations()->map(function ($standaloneDocker) {
+            return $standaloneDocker->applications;
+        })->flatten();
+    }
     public function destinations()
     {
         $standalone_docker = $this->hasMany(StandaloneDocker::class)->get();