[英]Call to a member function error in Laravel
我正在 Laravel 7 上建立一个博客,当我尝试创建一个帖子时,我收到此错误:
Call to a member function categories() on bool
这是我的控制器中的 store 方法:
public function store(Request $request)
{
// Validate incoming data
$this->validate($request, [
'title' => 'required',
'image' => 'required',
'categories' => 'required',
'body' => 'required',
]);
$data = array();
$data['title'] = $request->title;
$data['slug'] = str_slug($request->title);
$data['user_id'] = Auth::id();
$data['meta_title'] = $request->meta_title;
$data['meta_description'] = $request->meta_description;
$image = $request->file('image');
$data['body'] = $request->body;
$data['created_at'] = \Carbon\Carbon::now();
$slug = str_slug($request->title);
if($image) {
$image_name = $slug . "-" . date('dmy_H_s_i');
$ext = strtolower($image->getClientOriginalExtension());
$image_full_name = $image_name . '.' . $ext;
$upload_path = "public/assets/frontend/uploads/posts/";
$image_url = $upload_path . $image_full_name;
$success = $image->move($upload_path, $image_full_name);
$data['image'] = $image_url;
$post = DB::table('posts')->insert($data);
$post->categories()->attach($request->categories);
return redirect(route('admin.posts.index'))->with('successMsg', 'Post has been saved successfully!');
}
}
laravel 错误页面有这行有问题:
$post->categories()->attach($request->categories);
我的数据库中有一个单独的表,用于将帖子ID 与类别ID 连接起来,称为category_post 除了category_post 表中的新记录外,将帖子内容插入到数据库中
那么如何更改该代码以使其正常工作? 谢谢
DB::table('posts')->insert($data);
根据查询的成功/失败执行返回true|false
。 如果你想写
$post->categories()->attach($request->categories);
然后你需要模式Post
并创建这样的实例:
$post = new Post;
$post->title = $request->title;
// ...
$post->save();
然后你将拥有Post
类的实例
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