first upload all files

Modules/Slider/Entities/SliderSlide.php

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+<?php
+
+namespace Modules\Slider\Entities;
+
+use Modules\Media\Entities\File;
+use Modules\Support\Eloquent\Model;
+use Modules\Support\Eloquent\Translatable;
+
+class SliderSlide extends Model
+{
+    use Translatable;
+
+    /**
+     * The relations to eager load on every query.
+     *
+     * @var array
+     */
+    protected $with = ['translations', 'file'];
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = ['options', 'call_to_action_url', 'open_in_new_window', 'position'];
+
+    /**
+     * The attributes that should be cast to native types.
+     *
+     * @var array
+     */
+    protected $casts = [
+        'options' => 'array',
+        'open_in_new_window' => 'boolean',
+    ];
+
+    /**
+     * The attributes that are translatable.
+     *
+     * @var array
+     */
+    public $translatedAttributes = [
+        'file_id',
+        'caption_1',
+        'caption_2',
+        'direction',
+        'call_to_action_text',
+    ];
+
+    public function isAlignedLeft()
+    {
+        return $this->direction === 'left';
+    }
+
+    public function isAlignedRight()
+    {
+        return $this->direction === 'right';
+    }
+
+    public function file()
+    {
+        return $this->belongsTo(File::class)->withDefault();
+    }
+}