Question

我正在尝试将图片提交到数据库中，但我一直收到此错误：Type error: Argument 1 passed to Illuminate\Database\Eloquent\Relations\HasOneOrMany::save() must be an instance of Illuminate\Database\Eloquent\Model, null given, called in C:\xampp\htdocs\Evaluation\app\Http\Controllers\ImageController.php on line 24.

我在StackOverflow中检查了其他问题，大多数时候他们说这是保存部分的错误，他们放了这样的东西，$post但是我已经检查过并且没有任何问题。这种关系似乎也没有任何问题，但为什么它仍然不起作用？当我上传图片时，错误也会返回null。 null在这里的部分返回，$UserImage = $request->input('UserImage');那么我的问题可能在image1.blade.php吗？

ImageController：

public function test(personal_info $user){ 
    return view('image1',compact('user'));
}

public function test1(Request $request){
    $UserImage = new Image;
    $personal_info = new personal_info;
    $UserImage = $request->input('UserImage');
    $id = $request->user_id;
    $id = personal_info::find($id);
    $id->Images()->save($UserImage);
       return redirect('/summary');
    }

image1.blade.php（我提交表单的地方）

 <form class="form-horizontal" method="post" action="{{ url('/Upload')}}" enctype="multipart/form-data">

                        {{  csrf_field()  }}
<input type="hidden" name="user_id" value="{{$user->id}}">

<div class="form-group">
    <label for="imageInput" class="control-label col-sm-3">Upload Image</label>
            <div class="col-sm-9">
                <input type="file" name="UserImage">

        </div>
    </div>

 <div class="form-group">
            <div class="col-md-6-offset-2" style="padding-left: 30px">
              <input type="submit" class="btn btn-primary" value="Save">
            </div>
          </div>
          </form>

Image.php：

public function personal_infos() {
    return $this->belongsTo('App\personal_info', 'user_id', 'id');
}

personal_info.php：

public function Images() {
    return $this->hasOne('App\Image','user_id');
}

Answer 1

public function test1(Request $request)
{
    // make new instance of Image Model
    $imageModel = new Image;
    // find personal_info Model by id
    $personal_info = personal_info::findOrFail($request->input('user_id'));

    // UploadedFile
    $image = $request->file('UserImage');

    // get the file contents?
    $imageModel->content = ...

    // save the relationships, pass a model instance to `save`
    $personal_info->Images()->save($imageModel);

    return redirect('/summary');
}

无法在laravel中将二进制映像提交到数据库中

1 个答案: