Laravel 5.4回复父评论并在父评论下显示评论

Question

我有一个像这样的评论表

mysql> select * from review;
+----+----------+--------+------------+---------------------+---------------------+----------+------+---------+-----------+
| id | review   | rating | product_id | created_at          | updated_at          | approved | spam | user_id | parent_id |
+----+----------+--------+------------+---------------------+---------------------+----------+------+---------+-----------+
|  1 | how much |      2 |         25 | 2017-05-05 12:02:02 | 2017-05-05 12:02:02 |        1 |    0 |      10 |      NULL |
|  2 | 20       |   NULL |         25 | 2017-05-05 12:02:35 | 2017-05-05 12:02:35 |        1 |    0 |      10 |         1 |
|  3 | ok       |   NULL |         31 | 2017-05-08 05:09:01 | 2017-05-08 05:09:01 |        1 |    0 |       9 |         2 |
|  4 | 30       |   NULL |         31 | 2017-05-08 05:25:47 | 2017-05-08 05:25:47 |        1 |    0 |       9 |         3 |
|  5 | 40       |   NULL |         31 | 2017-05-08 05:26:21 | 2017-05-08 05:26:21 |        1 |    0 |       9 |         4 |
|  6 | not fair |   NULL |         31 | 2017-05-08 05:27:16 | 2017-05-08 05:27:16 |        1 |    0 |       9 |         5 |
|  7 | 80       |   NULL |         31 | 2017-05-08 05:29:26 | 2017-05-08 05:29:26 |        1 |    0 |       9 |         1 |
|  8 | hi       |   NULL |         29 | 2017-05-08 05:37:25 | 2017-05-08 05:37:25 |        1 |    0 |       9 |      NULL |
+----+----------+--------+------------+---------------------+---------------------+----------+------+---------+-----------+

当我尝试添加评论时。它正确存储他们的父ID我想要的是现在在他们的父评论下显示评论......

我怎样才能实现这一目标？

在我的控制器中，我正在使用2功能

显示评论的功能：

public function detail($id){
 $comments = Review::whereNull('parent_id')->orderBy('id', 'asc')->get();
      $result = array();
      foreach($comments as $comment){
          $list = array();
          $list = array_merge($list, [['id' => $comment->id, 'parent_id' => $comment->parent_id, 'review' => $comment->review]]);
          //return $list;
          $result = array_merge($result, $this->get_child_comment($comment->comment_id,0));
          //return $result; 
      }
      return view('pages.product_detail', ['detail_dir_imgs'=>$detail_dir_imgs ,'seller'=>$seller, 'product_detail' => $product_detail, 'last4products'=>$products, 'sim_products'=> $sim_products,'reviews'=>$result,'getProduct'=>$getProduct]);

    }
    public function get_child_comment($pid,$level,$list=array()) {
              $sub_comments = Review::where('parent_id','=',$pid)->where('id','!=',$pid)->orderBy('id', 'asc')->get();  
              foreach($sub_comments as $sub_comment){
                  $space = " "; 
                  $sigm='-';
                  for($j=0; $j<=$level; $j++)
                  {
                      $space .=$space;
                  }
                  for($j=0; $j<=$level; $j++)
                  {
                      $space .= $sigm;
                  }
                  $sub_comment->comment = html_entity_decode($space, ENT_QUOTES, "utf-8").' '.$sub_comment->comment;

                  $list = array_merge($list, array(['id' => $sub_comment->id, 'parent_id' => $sub_comment->parent_id, 'review' => $sub_comment->review]));

                  $list = $this->get_child_comment($sub_comment->id, $level+1, $list);
              }
            return $list;
          }

存储评论的功能：

public function review($id,Request $request){
        $userid = Auth::user()->id;
        $product = Product::find($id);
        $product = Product::find($id);
        $input = array(
          'review' => Input::get('review'),
          'rating'  => Input::get('rating'),
          'parent_id'  => Input::get('parent_id')
        );
        $review = new Review;
        $validator = Validator::make( $input, $review->getCreateRules());
        if ($validator->passes()) {
           $review->storeReviewForProduct($id, $input['review'], $input['rating'],$input['parent_id']);
          return redirect('product-detail/'.$id.'#reviews-anchor')->with('review_posted',true);
        }
        return Redirect::to('product-detail/'.$id.'#reviews-anchor')->withErrors($validator)->withInput();
    }

这在我看来：

 @foreach($reviews as $val) 
              <div class="row">
                  <div class="col-md-12">
                     <p>{{$val['review']}}   <span class="reply-comment">Reply</span></p>
                      {{-- Start Comment  --}}
                     <div class="comment-box" style="display:none;">
                       <form  action="{{ route('product.review',['id'=>$getProduct->id]) }}" method="post" id="comment">
                        {{csrf_field()}}
                        <input type="hidden" value="{{$val['id']}}" name="parent_id"  id="parent_id">
                        <textarea class="form-control animated" cols="50" id="new-comment" name="review" placeholder="Leave your comment here" rows="5"></textarea>
                        <div class="text-right">
                            <button class="bc-btn-cancel-review" href="#" id="close-comment">Close</button>
                            <button class="bc-btn-save-review" type="submit" id="review">Comment</button>
                        </div>
                       </form>
                     </div>
                    {{-- End Comment --}}
                 </div>
              </div>
            @endforeach

我希望输出像图像