Framework: Creating default object from empty value Laravel 5.6

[Moix1]

• Laravel Version: 5.6
• PHP Version: 7.1 +
• Database Driver & Version: mySQL

Description:
I'm trying to Edit details of User, Edit working Fine but not for Multiple Images, Single Image Being Edit not Multiple images, Got the error see image of error also my controller code am i missing something ?

========= Controller Started ===============

public function update(Request $request, $id)
{
$mainPhoto = $request->file('mainPhoto');
$otherPhotos = $request->file('otherPhotos');
$fashionPhotos = $request->file('fashionPhotos');
$arabicPhotos = $request->file('arabicPhotos');
$model = OurModels::find($id);

    $slug = str_slug($request->name);

    // Main Photo Code Start 

    if(isset($mainPhoto))
    {
      $currentDate = Carbon::now()->toDateString();
      $mainPhotoName = $slug .'-'. $currentDate .'-'. uniqid() .'.'. $mainPhoto->getClientOriginalExtension();

      if(!file_exists('uploads/models/mainPhoto'))
      {
        mkdir('uploads/models/mainPhoto', 0777, true);
      }

      if(file_exists('uploads/models/mainPhoto/'.$model->mainPhoto))
      {
        unlink('uploads/models/mainPhoto/'.$model->mainPhoto);
      }

      $mainPhoto->move('uploads/models/mainPhoto', $mainPhotoName);
    }else{
      $mainPhotoName = $model->mainPhoto;
    }

      // Main Photo Code End

      $model->name = $request->name;
      $model->dateofBirth = $request->dateob;
      $model->age = $request->age;
      $model->height = $request->height;
      $model->chest = $request->chest;
      $model->waist = $request->waist;
      $model->hips = $request->hips;
      $model->eye = $request->eye;
      $model->skin = $request->skin;
      $model->shoes = $request->shoes;
      $model->gender = $request->gender;
      $model->haircolor = $request->haircolor;
      $model->mobileNumber = $request->mobileNumber;
      $model->email = $request->email;
      $model->category = $request->category;
      $model->mainPhoto = $mainPhotoName;
      $model->save();
      $model->ethnicities()->sync($request->ethnicities);


      // Other Photos Code Start
      if(isset($otherPhotos)) {

        if(!file_exists('uploads/models/otherPhotos')) {
          mkdir('uploads/models/otherPhotos', 0777, true);
        }

        foreach($otherPhotos as $otherPhoto) { 
          $currentDate = Carbon::now()->toDateString();
          $otherPhotoName = $slug.'-'.$currentDate.'-'.uniqid().'.'.$otherPhoto->getClientOriginalExtension();
          Image::make($otherPhoto)->save('uploads/models/otherPhotos/'.$otherPhotoName,50);
          $otherPhoto = OtherPhoto::find($id);
          $otherPhoto->our_models_id = $model->id;
          $otherPhoto->image = $otherPhotoName;
          $otherPhoto->save();
        }

        if(file_exists('uploads/models/otherPhotos/'.$otherPhoto->image))
        {
          unlink('uploads/models/otherPhotos/'.$otherPhoto->image);
        }   

      }else{
             $otherPhotoName = $otherPhotos;   
      }

    // Other Photos Code End

    // Fashion k Code Start
      if(isset($fashionPhotos)) {

        if(!is_dir('uploads/models/fashionPhotos')) {
          mkdir('uploads/models/fashionPhotos', 0777, true);
        }


        foreach($fashionPhotos as $fashionPhoto) {  
          $currentDate = Carbon::now()->toDateString();
          $fashionPhotoName = $slug.'-'.$currentDate.'-'.uniqid().'.'.$fashionPhoto->getClientOriginalExtension();
          Image::make($fashionPhoto)->save('uploads/models/fashionPhotos/'.$fashionPhotoName,50);
          $fashionPhoto = FashionPhoto::find($id);
          $fashionPhoto->our_models_id = $model->id;
          $fashionPhoto->image = $fashionPhotoName;
          $fashionPhoto->save();
        }

        if(file_exists('uploads/models/fashionPhotos/'.$fashionPhoto->image))
        {
          unlink('uploads/models/fashionPhotos/'.$fashionPhoto->image);
        }

      }else{
             $fashionPhotoName = $fashionPhotos;   
      }

    // Fashion Photos Code End

    // Arabic Photos Code Start
      if(isset($arabicPhotos)) {

        if(!file_exists('uploads/models/arabicPhotos')) {
          mkdir('uploads/models/arabicPhotos', 0777, true);
        }

        foreach($arabicPhotos as $arabicPhoto) {
          $currentDate = Carbon::now()->toDateString();
          $arabicPhotoName = $slug.'-'.$currentDate.'-'.uniqid().'.'.$arabicPhoto->getClientOriginalExtension();
          Image::make($arabicPhoto)->save('uploads/models/arabicPhotos/'.$arabicPhotoName,50);
          $arabicPhoto = ArabicPhoto::find($id);
          $arabicPhoto->our_models_id = $model->id;
          $arabicPhoto->image = $arabicPhotoName;
          $arabicPhoto->save();
        }

        if(file_exists('uploads/models/arabicPhotos/'.$arabicPhoto->image))
        {
          unlink('uploads/models/arabicPhotos/'.$arabicPhoto->image);
        }

      }else{
             $arabicPhotoName = $arabicPhotos;   
      }

    // Arabic Photos Code End    

    return redirect()->route('ourmodels.index')->with('successMsg', 'Model Updated !');
}

========= Controller End ===================

[sisve]

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