I have a search form with multiple input and select boxes I need help to get if conditions in my query in order to each part works separately and all at once.

here is my blade codes:

<form action="{{route('advancesearch')}}" method="post">
      {{csrf_field()}}
      <div class="sidebar-title">
        <span>Advanced Search</span>
        <i class="fa fa-caret-down show_sidebar_content" aria-hidden="true"></i>
      </div>
      <!-- ./sidebar-title -->

      <div id="tags-filter-content" class="sidebar-content">
        <div class="filter-tag-group">

          @foreach($options as $option)
          <div class="tag-group">
            <p class="title">
              <span class="filter-title show_filter_content">{{$option->title}} <span class="pull-right"><i class="fa fa-minus"></i></span></span>
            </p>
            <div class="filter-content">
              <div class="checkbox">
              @foreach($option->suboptions as $suboption)
              <label for="suboptions">
                <input name="suboptions[]" type="checkbox" value="{{$suboption->id}}">
                {{ucfirst($suboption->title)}}
              </label>
              @endforeach
            </div>
          </div>
          </div>
          @endforeach
          <!-- ./tag-group -->

          <div class="tag-group">
            <p class="title">
              <span class="filter-title show_filter_content">Brand <span class="pull-right"><i class="fa fa-minus"></i></span></span>
            </p>
            <div class="filter-content">
              <div class="checkbox">
              @foreach($brands as $brand)
              <label for="brands">
                <input name="brands[]" type="checkbox" value="{{$brand->id}}">
                {{$brand->title}}
              </label>
              @endforeach
            </div>
          </div>
          </div>
          <!-- ./tag-group -->

          <div class="tag-group">
            <p class="title">
              <span class="filter-title show_filter_content">Price Range <span class="pull-right"><i class="fa fa-minus"></i></span></span>
            </p>
            <div class="row filter-content">
              <div class="col-md-6">
                <div class="form-group">
                  <label for="min_price" hidden>Min</label>
                  <input type="text" name="min_price" class="form-control" placeholder="Rp Min">
                </div>
              </div>
              <div class="col-md-6">
                <div class="form-group">
                  <label for="max_price" hidden>Max</label>
                  <input type="text" name="max_price" class="form-control" placeholder="Rp Max">
                </div>
              </div>
            </div>
          </div>
          <!-- tag-group -->

          <div class="text-center mt-20">
            <button type="submit" class="btn btn-danger">TERPAKAN</button>
          </div>

        </div><!-- ./filter-tag-group -->
      </div><!-- ./sidebar-content -->
    </form>

and this is my route:

Route::post('/advanced-search', 'frontendSearchController@filter')->name('advancesearch');

finally my function code is:

public function advancedsearch(Request $request) {
        $brands = Brand::all(); // uses for other part of the page. (not related to search function)
        $options = Option::all(); // uses for other part of the page. (not related to search function)
        $suboptions = DB::table('product_suboption'); // where my product_id and subopyion_id saves

        //search function
        $products = Product::where(function($query){
            //getting inputs
            $suboptions2 = Input::has('suboptions') ? Input::get('suboptions') : [];
            $min_price = Input::has('min_price') ? Input::get('min_price') : null;
            $max_price = Input::has('max_price') ? Input::get('max_price') : null;
            $brands2 = Input::has('brands') ? Input::get('brands') : [];

            //returning results
            $query->where('price','>=',$min_price)
                    ->where('price','<=',$max_price);
            })->get();

        return view('front.advancesearch', compact('products', 'brands', 'options'));
    }

My models relations:

product model:

public function options(){
     return $this->belongsToMany(Option::class);
  }
  public function suboptions(){
     return $this->belongsToMany(Suboption::class, 'product_suboption', 'product_id', 'suboption_id');
  }
public function brand(){
     return $this->belongsTo(Brand::class);
  }

Option model:

public function suboptions(){
     return $this->hasMany(Suboption::class, 'option_id');
  }

  public function products(){
     return $this->belongsToMany(Product::class);
  }

Suboption model:

public function option(){
     return $this->belongsTo(Option::class, 'option_id');
  }

  public function products(){
     return $this->belongsToMany(Product::class);
  }

Brand model:

public function products(){
     return $this->hasMany(Product::class);
}

note

My brands search is coming from products table where I have column brand_id for each product.

BUT

My suboptions come from 3rd table named product_suboption (as you see in my models codes) where i save product_id and suboption_id.