Question

我正在尝试建立一个论坛，用户可以在该论坛上发布主题，并且用户可以在主题的底部对主题进行评论，但是当我将评论部分添加到主题时，它会引发SQLSTATE[42S02]错误正在尝试使用来自laravel https://laravel.com/docs/5.8/eloquent-relationships的Morph关系源，以便将线程连接到相应的线程或注释。最终产品必须像Reddits的http://prntscr.com/mwvors一样，评论之间必须互为注释，并且可以对其他评论进行评论。

编辑： php artisan migrate之后，它更新了迁移，但给出了此错误

错误

"SQLSTATE[42S22]: Column not found: 1054 Unknown column 'comments.commmentable_id' in 'where clause' (SQL: select * from `comments` where `comments`.`commmentable_id` = 1 and `comments`.`commmentable_id` is not null and `comments`.`commmentable_type` = App\Thread) (View: C:\Users\Merlijn\AppData\Roaming\Composer\Laravel Projects\Forum\resources\views\thread\single.blade.php

single.blade.php

 {{--Answers/comments--}}
<div class="comment-list">
    @foreach($thread->comments as $comment)

        <h4>{{$comment->body}}</h4>
        <lead>{{$comment->user->name}}</lead>

    @endforeach
</div>
<div class="comment-form">
    <form action="{{ route('threadcomment.store', $thread->id) }}" method="post" role="form">
        {{csrf_field()}}
        <h4>Create Comment</h4>

        <div class="form-group">
            <input type="text" class="form-control" name="body" id="" placeholder="Input...">
        </div>

        <button type="submit" class="btn btn-primary">Comment</button>
    </form>
</div>

用户模型

 public function threads(){
    return $this->hasMany(Thread::class);
}

线程模型

 public function user()
{

    return $this->belongsTo(User::class);

}

public function comments()
{

    return $this->morphMany(Comment::class,'commmentable');

}

评论模型

 public function commenttable()
{

    return $this->morphTo();

}

public function user()
{

    return $this->belongsTo(User::class);

}

评论控制器

  public function addThreadComment(Request $request, Thread $thread)
{

    $this->validate($request,[
        'body' => 'required|min:10|max:250'
    ]);

    $comment = new Comment();
    $comment->body = $request->body;
    $comment->user_id = auth()->user()->id;

    $thread->comments()->save($comment);

}

web.php

 Route::resource('comment','CommentController', ['only' =>['update','destroy']]);
 Route::post('comment/create/{thread}','ThreadController@storeComment')->name('threadcommment.store');

Answer 1

代码中有错别字

 public function comments()
 {
 return $this- >morphMany(Comment::class,'commmentable');
 }

  Route::post('comment/create/{thread}','ThreadController@storeComment')->name('threadcommment.store');

三倍MMM，而不是2毫米

提供SQLSTATE [42S02] laravel 5.8的注释表

1 个答案: