php - Laravel:无需再次选择文件即可更新数据

Question

我有一个名为 projects 的表，其中包含以下字段:

表格信息

id、slug、order、public、pathheader 和 pathhome。

创建 View

存储数据的表单如下所示:

<div id="formcreateproject">
        <form  enctype="multipart/form-data" id="myFormProject" name="myFormProject">
         <input type="hidden" name="_token" value="{{ Session::token() }}">

          <div class="form-group">
            <label name="title">Slug:</label>
            <input type="text" id="slug" name="slug" placeholder="ejemplo-de-slug" class="form-control form-control-sm"><br>
      <!--      <label name="order">Order:</label>
            <input type="number" id="order" name="order" class="form-control form-control-sm">-->
            <!--<label name="public">Public:</label>-->
              <table>
                <tr>
                  <td>
                      <img src="" id="img" class="img" style="width:100%;height:200px;background-color:#ccc;border:2px solid gray;" onerror="this.src='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII='">
                      <input type="file" name="pathheader" id="pathheader"  class="form-control-file" aria-describedby="fileHelp" style="display:none;">
                  </td>
                  <td>
                      <img src="" id="img2" class="img2" style="width:100%;height:200px;background-color:#ccc;border:2px solid gray;" onerror="this.src='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII='">
                      <input type="file" name="pathhome" id="pathhome" class="form-control-file" aria-describedby="fileHelp" style="display:none;"><br>
                  </td>
                </tr>
                <tr>
                  <td>
                      <input type="button" name="" value="Seleccionar header" id="browse_file" class="btn btn-danger form-control">
                  </td>
                  <td>
                      <input type="button" name="" value="Seleccionar home" id="browse_file2" class="btn btn-danger form-control">
                  </td>
                </tr>
              </table><br>
            <input type="submit" value="Crear Proyecto" id="createprojectsubmit" class="btn btn-danger btn-md">
            <br><br><br>

          </div>
        </form>

      </div>

保存数据的功能

函数看起来像这样:

 public function storeProject(Request $request)
        {

        $project = new Project();
        $project->slug = $request->input("slug");
        //$project->order = $request->input("order");
        $project->order = DB::table('projects')
                      ->where('order', DB::raw("(select max(`order`) from projects)"))
                      ->first()
                      ->order + 1; 
        $project->public = 0;
        $project->pathheader = $request->file('pathheader');
        $project->pathhome = $request->file('pathhome');

        \Storage::disk('projects')->makeDirectory($project->slug);
        \Storage::disk('projects')->putFileAs($project->slug,$project->pathheader,'header.jpg');
        \Storage::disk('projects')->putFileAs($project->slug,$project->pathhome,'home.jpg');
        $project->save();
        }

这真的很好用，并在 pathheader 和 pathhome 中保存了如下值:/tmp/phQX0ddm。

查看更新数据

<div class="form-group">
                <label><strong>Slug</strong></label>
                  <textarea type="text" class="form-control form-control-sm" id="slug" name="slug" rows="1" required style="resize:none;">{{$project->slug}}</textarea>
              </div>

                  <div class="form-group">
                      <label><strong>Order</strong></label>
                      <textarea type="number" class="form-control form-control-sm" id="order" name="order" rows="1">{{$project->order}}</textarea>
                </div>

            <div class="form-group">
                <label><strong>Public</strong></label>
                <textarea type="text" class="form-control form-control-sm" id="public" name="public" value="" rows="1">{{$project->public}}</textarea>
            </div>

            <div class="form-group">
           <table>
                <tr>
                  <td>
                      @if (Storage::disk('projects')->has($project->slug))
                      <img src="{{ asset('/storage/projects/'.$project->slug.'/header.jpg') }}" id="img" class="img" style="width:100%;height:200px;background-color:#ccc;border:2px solid gray;">
                      @else
                      <img src="" id="img" class="img" style="width:100%;height:200px;background-color:#ccc;border:2px solid gray;">
                      @endif
                      <input type="file" name="pathheader" id="pathheader" class="form-control-file" aria-describedby="fileHelp" style="display:none;">
                  </td>
                  <td>
                      @if (Storage::disk('projects')->has($project->slug))
                      <img src="{{ asset('/storage/projects/'.$project->slug.'/home.jpg') }}" id="img" class="img" style="width:100%;height:200px;background-color:#ccc;border:2px solid gray;">
                      @else
                      <img src="" id="img2" class="img2" style="width:100%;height:200px;background-color:#ccc;border:2px solid gray;">
                      @endif
                      <input type="file" name="pathhome" id="pathhome" class="form-control-file" aria-describedby="fileHelp" style="display:none;"><br>
                  </td>
                </tr>
                <tr>
                  <td>
                      <input type="button" name="" value="Seleccionar header" id="browse_file" class="btn btn-danger form-control">
                  </td>
                  <td>
                      <input type="button" name="" value="Seleccionar home" id="browse_file2" class="btn btn-danger form-control">
                  </td>
                </tr>
     </table>

更新数据的函数

public function updateProject(Request $request, $id) 

//Actualizar la informacion de un trabajador
    {
        $project = Project::find($id);
        $project->slug = $request->input('slug');
        $project->order = $request->input('order');
        $project->public = $request->input('public');
        if($request->hasFile('pathheader')){
            $project->pathheader = $request->file('pathheader');
            \Storage::disk('projects')->putFileAs($project->slug,$project->pathheader,'header.jpg');
        }
        $project->pathheader = Project::find($id)->pathheader;
        if($request->hasFile('pathhome')){
            $project->pathhome = $request->file('pathhome');
            \Storage::disk('projects')->putFileAs($project->slug,$project->pathhome,'home.jpg');
        }
        $project->pathhome = Project::find($id)->pathhome;
        $project->save();
    }

问题是，如果我在更新数据时没有再次选择文件，则不会加载图像。

我该如何解决这个问题？我的第一个想法是获取 pathhome 和 pathheader 的值并将其放在功能 Controller 上以使用相同的值再次更新数据，但不起作用。

我希望有人能帮助我，我将非常感激。

Answer 1

您可以像这样使用项目模型:

$pathheader = Project::find($id)->pathheader;