php - Laravel - 数据没有通过形成
问题描述
我有一个用于创建课程的创建表单,我已经为这些课程分配了用户,但是由于某种原因它不再起作用了。我已经通过我的代码无数次,我找不到任何改变 - 所以我来这里寻求帮助。
下面给出一些上下文是我的 index.blade.php。如您所见,我之前已将用户分配给课程。
创建.blade.php;
@extends('layouts.app')
@section('content')
<div class="row justify-content-center">
<div class="col-md-8">
<div class="card">
<div class="card-header">Create Course</div>
<div class="card-body">
<form method="POST" action="{{ route('admin.courses.store') }}" enctype="multipart/form-data">
@csrf
<div class="form-group">
<label class="required" for="name">Course Title</label>
<input class="form-control" type="text" name="title" id="id" value="{{ old('title', '') }}" required>
@if($errors->has('name'))
<div class="invalid-feedback">
{{ $errors->first('name') }}
</div>
@endif
</div>
<div class="form-group">
@can('create_courses')
{!! Form::label('Instructor', 'Instructor', ['class' => 'control-label']) !!}
{!! Form::select('Instructor[]', $instructors, Request::get('Instructor'), ['class' => 'form-control select2', 'multiple' => 'multiple']) !!}
@if($errors->has('Instructor'))
{{ $errors->first('Instructor') }}
@endif
@endcan
</div>
<div class="form-group">
<button class="btn btn-danger" type="submit">
Save
</button>
</div>
</div>
</form>
</div>
</div>
@endsection
索引.blade.php;
@extends('layouts.app')
@section('content')
<div class="container">
<div class="row justify-content-center">
<div class="col-md-10">
<p>
@can('create_courses')
<a href="{{ route('admin.courses.create') }}"><button type="button" class="btn btn-success">Create Course</button></a>
@endcan('create_courses')
</p>
<div class="card">
<div class="card-header">Courses</div>
<div class="card-body">
<div class="table-responsive">
<table class="table">
<thead>
<tr>
<th>ID</th>
<th>Course Title</th>
<th>Instructor</th>
<th></th>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
@foreach($course as $course)
<tr>
<th scope="row">{{ $course->id }}</th>
<td>{{ $course->title}}</td>
<td>{{ implode (', ', $course->instructors()->pluck('name')->toArray()) }}</td>
<td>
@can('edit_courses')
<a class="btn btn-xs btn-secondary" href="{{ route('admin.modules.index', $course->id) }}">
Modules
</a>
@endcan
</td>
<td>
@can('edit_courses')
<a class="btn btn-xs btn-primary" href="{{ route('admin.courses.edit', $course->id) }}">
Edit
</a>
@endcan
</td>
<td>
@can('delete_courses')
<form action="{{ route('admin.courses.destroy', $course->id) }}" method="POST" onsubmit="return confirm('Confirm delete?');" style="display: inline-block;">
<input type="hidden" name="_method" value="DELETE">
<input type="hidden" name="_token" value="{{ csrf_token() }}">
<input type="submit" class="btn btn-xs btn-danger" value="Delete">
</form>
@endcan
</td>
</tr>
@endforeach
</tbody>
</table>
</div>
</div>
</div>
</div>
<!-- <div class="col-md-2 col-lg-2">
<div class="list-unstyled">
<a href=""class="list-group-item">Courses</a>
<a href=""class="list-group-item">Modules</a>
</div>
</div> -->
</div>
</div>
@endsection
CoursesController.php;
<?php
namespace App\Http\Controllers\Admin;
use Gate;
use App\User;
use App\Course;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Input;
class CoursesController extends Controller
{
public function __construct()
{
//calling auth middleware to check whether user is logged in, if no logged in user they will be redirected to login page
$this->middleware('auth');
}
public function index()
{
if(Gate::denies('manage_courses')){
return redirect(route('home'));
}
$courses = Course::all();
return view('admin.course.index')->with('course', $courses); //pass data down to view
}
public function create()
{
if(Gate::denies('create_courses')){
return redirect(route('home'));
}
$instructors = User::whereHas('role', function ($query) {
$query->where('role_id', 2); })->get()->pluck('name'); //defining instructor variable to call in create.blade.php. Followed by specifying that only users with role_id:2 can be viewed in the select form by looping through the pivot table to check each role_id
return view('admin.course.create', compact('instructors')); //passing instructor to view
}
public function store(Request $request)
{
$course = Course::create($request->all()); //request all the data fields to store in DB
$course->instructors()->sync($request->input('instructors', [])); //input method retrieves all of the input values as an array
if($course->save()){
$request->session()->flash('success', 'The course ' . $course->title . ' has been created successfully.');
}else{
$request->session()->flash('error', 'There was an error creating the course');
}
return redirect()->route ('admin.courses.index');
}
public function destroy(Course $course)
{
if(Gate::denies('delete_courses'))
{
return redirect (route('admin.course.index'));
}
$course->delete();
return redirect()->route('admin.courses.index');
}
public function edit(Course $course)
{
if(Gate::denies('edit_courses'))
{
return redirect (route('admin.courses.index'));
}
$instructors = User::whereHas('role', function ($query) {
$query->where('role_id', 2); })->get()->pluck('name');
return view('admin.course.edit')->with([
'course' => $course
]);
}
public function update(Request $request, Course $course)
{
$course->update($request->all());
if ($course->save()){
$request->session()->flash('success', $course->title . ' has been updated successfully.');
}else{
$request->session()->flash('error', 'There was an error updating ' . $course->title);
}
return redirect()->route('admin.courses.index');
}
public function show(Course $course)
{
return view('admin.course.show', compact('course'));
}
}
我是 laravel 的新手,所以我将不胜感激。
解决方案
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