laravel-5 - 传递给 Illuminate\Database\Eloquent\Relations\HasOneOrMany::save() 的参数 1 必须是 Illuminate\Database\Eloquent\Model 的实例

Question

我对 Laravel 还很陌生，我正在尝试将用户创建的帖子添加到数据库中。但是当我这样做时，出现以下错误:

Argument 1 passed to Illuminate\Database\Eloquent\Relations\HasOneOrMany::save() must be an instance of Illuminate\Database\Eloquent\Model, string given, called in C:\xampp\htdocs\lar\app\Http\Controllers\PostController.php on line
25 and defined

用户模型:

<?php

namespace App;

use Illuminate\Contracts\Auth\Authenticatable;
use Illuminate\Database\Eloquent\Model;

class User extends Model implements Authenticatable
{
    use \Illuminate\Auth\Authenticatable;

    public function posts()
    {
        return $this->hasMany('App\Post');
    }
}

发布模型:

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Post extends Model
{
    public function user()
    {
        return $this->belongsTo('App\User') ;
    }
}

后 Controller :

<?php

namespace App\Http\Controllers;

use App\Post;
use Illuminate\Http\Request;

class postController extends Controller
{
    public function postCreatePost(Request $request){
        // Validation
        $post = new Post();
        $post->$request['body'];
        $request->user()->posts()->save('$post');
        return redirect()->route('dashboard');
    }
}

发布路线:

Route::post('/createpost',[
    'uses' => 'PostController@postCreatePost',
    'as'=>'post.create'
]);

表单操作:

<form action="{{route('post.create')}}" method="post">

请告诉我如何解决这个问题..如何解决这个问题？提前谢谢你..:)

Answer 1

我想你想要的是这样的:

<?php

namespace App\Http\Controllers;

use App\Post;
use Illuminate\Http\Request;

class postController extends Controller
{
    public function postCreatePost(Request $request){
        // Validation
        $post = new Post();

        // here you set the body of the post like that
        $post->body = $request->body;

        // here you pass the $post object not as string
        $request->user()->posts()->save($post);
        return redirect()->route('dashboard');
    }
}

您需要将 $post 对象作为对象传递给 save 方法。当您需要执行此操作时，您正在执行以下操作:$user->posts()->save('$post'):$user->posts()->save($发布)。

希望有帮助。