将多个项目从一个循环插入数据库（尝试获取非对象的属性）

Question

Pleass我需要快速帮助解决错误（尝试获取非对象的属性（查看：C：\ xampp \ htdocs \ Laravel_Apps \ edu_hub \ admin \ resources \ views \ admin \ coursePreset.blade.php））我尝试将多个复选框项目提交到数据库中。这个问题似乎来自刀片，因此数据尚未触及控制器。

请在下面找到我的代码：

coursePreset.blade.php

@extends('layouts.admin_layout') 

@section('page-name') 
    Course Preset 
@stop 

@section('title') 
    Admin | Course Preset 
@stop 

@section('crumbs') 
    <li><a href="{{ url('/admin-index') }}">Dashboard</a></li> 
    <li class="active">Course Preset</li> 
@stop 

@section('content') 
    <div class="col-md-12 col-xs-6"> 
     <div class="white-box"> 
      <h3 class="box-title text-center">Course Preset List</h3> 
      <form class="form-horizontal form-material" action="{{url('/preset')}}" method="POST"> 
       {{csrf_field()}} 

       <div class="row"> 

        <div class="form-group"> 
         <div class="row"> 
          <div class="col-md-2 col-md-offset-3"> 
           <select class="form-control" name="level"> 

            <option>Select</option> 
            @foreach($level as $item) 
             <option value="{{$item->level}}">{{$item->level}}</option> 
            @endforeach 
           </select> 
          </div> 
          <div class="col-md-2"> 
           <select class="form-control" name="semester"> 

            <option>Select</option> 
            @foreach($semester as $item) 
             <option value="{{$item->semester}}">{{$item->semester}}</option> 
            @endforeach 
           </select> 
          </div> 
          <div class="col-md-3"> 
           <button type="submit" class="btn btn-success ">Submit Query</button> 
          </div> 
         </div> 
        </div> 
       </div> 
      </form> 
        <div class="row text-center"> 
         <div class="col-md-5 col-sm-6"><h3 class="box-title text-blue">LEVEL: {{$details->level}}</h3></div> 
         <div class="col-md-5 col-sm-6"><h3 class="box-title text-success">SEMESTER: {{$details->semester}}</h3></div> 
        </div> 
      <form class="form-horizontal form-material" action="{{url('/preset')}}" method="POST"> 
       {{csrf_field()}} 
        <div class="row"> 
         <div class="col-md-4 col-md-offset-3"> 
          {{--@if($count == 0){ 
           <p>No Courses Available at the moment</p> 
          }@else--}} 
          @foreach($course as $element) 
           <div class="checkbox checkbox-success"> 
            <input id="checkbox4" type="checkbox" value="{{$element->code}}" name="checkbox" multiple> 
            <label for="checkbox4">{{$element->name.'-'.$element->code.'-'.$element->credit_hrs}}</label> 
           </div> 
          @endforeach 
          {{-- @endif--}} 
         </div> 
        </div> 
       <div class="row"> 
        <div class="col-md-5 col-md-offset-4"> 
         <button type="submit" class="btn btn-success">Activate Preset</button> 
        </div> 
       </div> 
      </form> 
     </div> 
    </div> 


@stop 

从coursePresetController

<?php 

namespace App\Http\Controllers; 

use App\coursePreset; 
use App\Subject; 
use Illuminate\Http\Request; 

class coursePresetController extends Controller 
{ 
    /** 
    * Display a listing of the resource. 
    * 
    * @return \Illuminate\Http\Response 
    */ 
    public function __construct() 
    { 
     $this->middleware('auth'); 
    } 

    public function index() 
    { 
     $preset = Subject::select('code')->get(); 


     $details = Subject::select('level', 'semester') 
      ->get() 
      ->first() 
     ; 

     $level = Subject::select('level') 
      ->groupBy('level') 
      ->get(); 

     $semester = Subject::select('semester') 
      ->groupBy('semester') 
      ->get(); 

     $mylevel = ['level']; 
     $mysemester = ['semester']; 

     $course = Subject::select('subjects.name', 'subjects.code', 'subjects.credit_hrs') 
      ->where('subjects.level', '=', $mylevel) 
      ->where('subjects.semester', '=', $mysemester) 
      ->get(); 

     //dd($course); 

     return view('admin.coursePreset') 
      ->with('level', $level) 
      ->with('semester', $semester) 
      ->with('course', $course) 
      ->with('details', $details) 
      ->with('preset', $preset); 
    } 

    /** 
    * Show the form for creating a new resource. 
    * 
    * @return \Illuminate\Http\Response 
    */ 
    public function create() 
    { 
     // 
    } 

    /** 
    * Store a newly created resource in storage. 
    * 
    * @param \Illuminate\Http\Request $request 
    * @return \Illuminate\Http\Response 
    */ 
    public function store(Request $request) 
    { 
     dd($request->all()); 
     $preset = new coursePreset(); 

     $preset->name = $request['name']; 
     $preset->code = $request['code']; 
     $preset->credit_hrs = $request['credit_hrs']; 
     $preset->semester = $request['semester']; 
     $preset->level = $request['level']; 

     if ($preset->save()){ 
      //flash($request['name'].' successfully saved.')->success(); 
      echo 'saved'; 
     }else{ 
      // flash($request['name'].' not saved.')->error(); 
      echo 'Not saved'; 
     } 

     return redirect()->back(); 
    } 

    /** 
    * Display the specified resource. 
    * 
    * @param int $id 
    * @return \Illuminate\Http\Response 
    */ 
    public function show($id) 
    { 
     // 
    } 

    /** 
    * Show the form for editing the specified resource. 
    * 
    * @param int $id 
    * @return \Illuminate\Http\Response 
    */ 
    public function edit($id) 
    { 
     // 
    } 

    /** 
    * Update the specified resource in storage. 
    * 
    * @param \Illuminate\Http\Request $request 
    * @param int $id 
    * @return \Illuminate\Http\Response 
    */ 
    public function update(Request $request, $id) 
    { 
     // 
    } 

    /** 
    * Remove the specified resource from storage. 
    * 
    * @param int $id 
    * @return \Illuminate\Http\Response 
    */ 
    public function destroy($id) 
    { 
     // 
    } 

    public function view(Request $request) 
    { 
     $level = Subject::select('level') 
      ->groupBy('level') 
      ->get(); 

     $semester = Subject::select('semester') 
      ->groupBy('semester') 
      ->get(); 

     $mylevel = $request['level']; 
     $mysemester = $request['semester']; 

     //dd($level, $semester); 

     $course = Subject::select('subjects.name', 'subjects.code', 'subjects.credit_hrs') 
      ->where('subjects.level', '=', $mylevel) 
      ->where('subjects.semester', '=', $mysemester) 
      ->get(); 

     //dd($course); 
     $details = Subject::select('level', 'semester') 
      ->where('semester', '=', $mysemester) 
      ->where('level', '=', $mylevel) 
      ->get() 
      ->first() 
     ; 

     //$count = ($course); 

     return view('admin.coursePreset') 
      ->with('course', $course) 
      ->with('level', $level) 
      ->with('semester', $semester) 
      ->with('details', $details); 
      //;->with('count', $count); 
    } 
} 

快速帮助将非常感激这里的。 感谢

Answer 1

你在这里做了错误的控制器指数法：

$details = Subject::select('level', 'semester') 
      ->get() 
      ->first() 
     ; 

这应该是

$details = Subject::select('level', 'semester')->first(); 

希望这有助于。