4
我正在使用laravel 5来建立多对多的关系。 以下是我的代码。Laravel 5调用未定义的方法Illuminate Database Eloquent Collection :: attach（）
Article.php
namespace App;
use Illuminate\Database\Eloquent\Model;
use Carbon\Carbon;
class Article extends Model {
protected $fillable = ['title', 'body', 'published_at', 'user_id'];
protected $dates = ['published_at'];
public function setPublishedArAttribute($date)
{
Carbon::createFromFormat('Y-m-d', $date);
$this->attributes['published_at'] = Carbon::parse($date);
}
public function scopePublished($query)
{
$query->where('published_at', '<=', Carbon::now());
}
public function scopeUnpublished($query)
{
$query->where('published_at', '>', Carbon::now());
}
public function user()
{
return $this->belongsTo('App\User');
}
public function tags()
{
return $this->belongsToMany('App\Tag');
}
}
Tag.php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Tag extends Model {
protected $fillable = [
'name'
];
public function articles()
{
return $this->belongsToMany('App\Article');
}
}
ArticleController.php
namespace App\Http\Controllers;
use App\Article;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use Request;
use Carbon\Carbon;
use Auth;
class ArticlesController extends Controller {
public function __construct()
{
$this->middleware('auth', ['except', 'index']);
}
public function index()
{
$articles = Article::latest('published_at')->published()->get();
return view('articles.index', compact('articles'));
}
public function show(Article $article)
{
return view('articles.show', compact('article'));
}
public function create()
{
if(Auth::guest()){
return redirect('articles');
}
$tags = \App\Tag::lists('name', 'id');
return view('articles.create', compact('tags'));
}
public function store(Requests\ArticleRequest $request)
{
$article = Auth::user()->articles()->create($request->all());
$article->tags->attach($request->input('tags'));
\Session::flash('flash_message', 'Your article has been created!');
Article::create($request->all());
return redirect('articles');
}
public function edit(Article $article)
{
return view('articles.edit', compact('article'));
}
public function update(Article $article, Requests\ArticleRequest $request)
{
$article->update($request->all());
return redirect('articles');
}
}
当我尝试创建文章，并在ArticleController使用存储功能将其存储在数据库我得到以下错误。
FatalErrorException在ArticlesController.php行：调用未定义的方法照亮\数据库\雄辩\收藏::连接（）
我已经设置许多文章和标签之间一对多的关系，也适当补充迁移。
但是，当我尝试添加文章使用标签我得到错误。 让我知道我的代码有什么问题。设置关系中缺少任何东西。
而且这是迁移表文件
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateTagsTable extends Migration {
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('tags', function(Blueprint $table)
{
$table->increments('id');
$table->string('name');
$table->timestamps();
});
Schema::create('article_tag', function(Blueprint $table){
$table->increments('id');
$table->integer('article_id')->unsigned()->index();
$table->foreign('article_id')->references('id')->on('articles')->onDelete('cascade');
$table->integer('tag_id')->unsigned()->index();
$table->foreign('tag_id')->references('id')->on('tags')->onDelete('cascade');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::drop('tags');
Schema::drop('article_tag');
}
}
让我知道我应该怎么做才能让许多附加工作，许多关系