Question

我有这个错误

SQLSTATE [23000]：完整性约束违规：1052字段列表中的列'id'不明确（SQL：select id，followers.user_id as pivot_user_id，followers.follows_id as pivot_follows_id，followers.created_at as pivot_created_at，followers.updated_at as来自users.id = followers.follows_id的用户内部联接关注者的pivot_updated_at，其中followers.user_id = 1且following_id = 2 limit 1）

（查看：/Users/harshitsingh/Documents/logos/resources/views/users/index.blade.php）   这是我的UsersController

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\User;
use Image;
use Auth;
use Profile;
use App\Post;
use App\Notifications\UserFollowed;

class UsersController extends Controller
{
    public function index()
    {
        $users = User::where('id', '!=', auth()->user()->id)->get();
        return view('users.index', compact('users'));
    }

    public function profile(){
        return view('profile');
    }


    public function update_avatar(Request $request){

            // Handle the user upload of avatar
        if($request->hasFile('avatar')){
            $avatar = $request->file('avatar');
            $filename = time() . '.' . $avatar->getClientOriginalExtension();
            Image::make($avatar)
            ->resize(300, 300)
            ->save( public_path('/uploads/avatars/' . $filename ) 
        );

            $user = Auth::user();
            $user->avatar = $filename;
            $user->save();
        }

        return redirect('/');

    }

    public function follow(User $user)
    {
        $follower = auth()->user();
        if ($follower->id == $user->id) {
            return back()->withError("You can't follow yourself");
        }
        if(!$follower->isFollowing($user->id)) {
            $follower->follow($user->id);

            // sending a notification
            $user->notify(new UserFollowed($follower));

            return back()->withSuccess("You are now friends with {$user->name}");
        }
        return back()->withError("You are already following {$user->name}");
    }

    public function unfollow(User $user)
    {
        $follower = auth()->user();
        if($follower->isFollowing($user->id)) {
            $follower->unfollow($user->id);
            return back()->withSuccess("You are no longer friends with {$user->name}");
        }
        return back()->withError("You are not following {$user->name}");
    }

    public function notifications()
    {
        return auth()->user()->unreadNotifications()->limit(5)->get()->toArray();
    }


    public function show(Post $post, $id)
    {
        $user = User::findOrFail($id);
        return view('user.profile', compact('user'));
    }
}

我正在尝试用户与用户的关系这是用户模型 `

 public function followers() 
        {
            return $this->belongsToMany(self::class, 'followers', 'follows_id', 'user_id')
                        ->withTimestamps();
        }

        public function follows() 
        {
            return $this->belongsToMany(self::class, 'followers', 'user_id', 'follows_id')
                        ->withTimestamps();
        }

        public function follow($userId) 
        {
            $this->follows()->attach($userId);
            return $this;
        }

        public function unfollow($userId)
        {
            $this->follows()->detach($userId);
            return $this;
        }

        public function isFollowing($userId) 
        {
            return (boolean) $this->follows()->where('follows_id', $userId)->first(['id']);
        }

`

Answer 1

尝试学习如何阅读错误消息。

SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'id' in field list is ambiguous

此消息告诉您有2个或更多id字段，哪个SQL不知道哪个SELECT。在您的UserController代码中，代码似乎不在那里，您可能需要查看User模型。

您必须更新

SELECT id ...

到

SELECT users.id ...

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1 个答案: