wip fix

app/Models/ElementGroup.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class ElementGroup extends Model
+{
+    protected $fillable = [
+        'element_id',
+        'group_id',
+        'competition_group_id',
+    ];
+
+    public function element()
+    {
+        return $this->belongsTo(Element::class);
+    }
+
+    public function group()
+    {
+        return $this->belongsTo(Group::class);
+    }
+
+    public function competition_group()
+    {
+        return $this->belongsTo(CompetitionGroup::class);
+    }
+}