Moved the duplicate checks (#568) to this PR as they are related

app/Http/Controllers/EventAccessCodesController.php

@@ -57,8 +57,20 @@ class EventAccessCodesController extends MyBaseController
             ]);
         }
 
+        // Checks for no duplicates
+        $newAccessCode = strtoupper(strip_tags($request->get('code')));
+        if (EventAccessCodes::findFromCode($newAccessCode, $event_id)->count() > 0) {
+            return response()->json([
+                'status' => 'error',
+                'messages' => [
+                    'code' => [ trans('AccessCodes.unique_error') ],
+                ],
+            ]);
+        }
+
+        // Saves the new access code if validation and dupe check passed
         $eventAccessCode->event_id = $event_id;
-        $eventAccessCode->code = strtoupper(strip_tags($request->get('code')));
+        $eventAccessCode->code = $newAccessCode;
         $eventAccessCode->save();
 
         session()->flash('message', trans('AccessCodes.success_message'));

app/Models/EventAccessCodes.php

@@ -2,6 +2,9 @@
 
 namespace App\Models;
 
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\SoftDeletes;
 
 class EventAccessCodes extends MyBaseModel
@@ -20,6 +23,19 @@ class EventAccessCodes extends MyBaseModel
             ->increment('usage_count');
     }
 
+    /**
+     * @param $code
+     * @param $event_id
+     * @return Collection
+     */
+    public static function findFromCode($code, $event_id)
+    {
+        return (new static())
+            ->where('code', $code)
+            ->where('event_id', $event_id)
+            ->get();
+    }
+
     /**
      * The validation rules.
      *
@@ -35,15 +51,15 @@ class EventAccessCodes extends MyBaseModel
     /**
      * The Event associated with the event access code.
      *
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     * @return BelongsTo
      */
     public function event()
     {
-        return $this->belongsTo(\App\Models\Event::class, 'event_id', 'id');
+        return $this->belongsTo(Event::class, 'event_id', 'id');
     }
 
     /**
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
+     * @return BelongsToMany
      */
     function tickets()
     {

resources/lang/en/AccessCodes.php

@@ -15,4 +15,5 @@ return [
     'no_tickets_matched' => 'No Tickets matched to your access code',
     'select_access_code' => 'Select Access Codes',
     'access_codes_usage_count' => 'Usage Count',
+    'unique_error' => 'Code already used for this event',
 ];