Cleanup location model and controller for Admin.

app/Http/Controllers/Admin/LocationsController.php

@@ -43,35 +43,21 @@ class LocationsController extends Controller
     public function getIndex(Request $request)
     {
         return view('admin.locations.index', [
-            'locations' => Models\Location::select(
+            'locations' => Models\Location::withCount('nodes', 'servers')->paginate(20),
-                    'locations.*',
-                    DB::raw('(SELECT COUNT(*) FROM nodes WHERE nodes.location_id = locations.id) as a_nodeCount'),
-                    DB::raw('(SELECT COUNT(*) FROM servers WHERE servers.node_id IN (SELECT nodes.id FROM nodes WHERE nodes.location_id = locations.id)) as a_serverCount')
-                )->paginate(20),
         ]);
     }
 
     public function deleteLocation(Request $request, $id)
     {
-        $model = Models\Location::select(
+        $location = Models\Location::withCount('nodes')->findOrFail($id);
-            'locations.id',
-            DB::raw('(SELECT COUNT(*) FROM nodes WHERE nodes.location_id = locations.id) as a_nodeCount'),
-            DB::raw('(SELECT COUNT(*) FROM servers WHERE servers.node_id IN (SELECT nodes.id FROM nodes WHERE nodes.location_id = locations.id)) as a_serverCount')
-        )->where('id', $id)->first();
 
-        if (! $model) {
+        if ($location->nodes_count > 0) {
             return response()->json([
-                'error' => 'No location with that ID exists on the system.',
+                'error' => 'You cannot remove a location that is currently assigned to a node.',
-            ], 404);
-        }
-
-        if ($model->a_nodeCount > 0 || $model->a_serverCount > 0) {
-            return response()->json([
-                'error' => 'You cannot remove a location that is currently assigned to a node or server.',
             ], 422);
         }
 
-        $model->delete();
+        $location->delete();
 
         return response('', 204);
     }

app/Models/Location.php

@@ -41,4 +41,24 @@ class Location extends Model
      * @var array
      */
     protected $guarded = ['id', 'created_at', 'updated_at'];
+
+    /**
+     * Gets the nodes in a specificed location.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
+    public function nodes()
+    {
+        return $this->hasMany(Node::class);
+    }
+
+    /**
+     * Gets the servers within a given location.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasManyThrough
+     */
+    public function servers()
+    {
+        return $this->hasManyThrough(Server::class, Node::class);
+    }
 }

resources/views/admin/locations/index.blade.php

@@ -46,8 +46,8 @@
                 <tr>
                     <td><code>{{ $location->short }}</code></td>
                     <td>{{ $location->long }}</td>
-                    <td class="text-center">{{ $location->a_nodeCount }}</td>
+                    <td class="text-center">{{ $location->nodes_count }}</td>
-                    <td class="text-center">{{ $location->a_serverCount }}</td>
+                    <td class="text-center">{{ $location->servers_count }}</td>
                     <td class="text-center"><a href="#edit"><i class="fa fa-wrench" data-toggle="modal" data-target="#editModal" data-action="edit" data-id="{{ $location->id }}" data-short="{{ $location->short }}" data-long="{{ $location->long }}"></i></a></td>
                     <td class="text-center"><a href="#delete" class="text-danger" data-action="delete" data-id="{{ $location->id }}"><i class="fa fa-trash-o"></i></a></td>
                 </tr>