SQLSTATE [42S22]：找不到列：1054'where子句'中的未知列'roles.user_id'

Question

尝试从“用户”添加或检索“角色”时，我遇到以下错误。

  

SQLSTATE [42S22]：找不到列：1054未知列'roles.user_id'   在'where子句'（SQL：select * from -------------- |id|name | -------------- |2 |rav (21) | -------------- |3 |nag (123)| -------------- where roles。roles   = 1和user_id。roles不是空限制1）

表

user_id

Role.php

public function up()
    {
        Schema::create('roles', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name', 50);
            $table->timestamps();
        });
    }

user.php的

class Role extends Model
{
    protected $fillable = ['name'];
    public $timestamps = false;

    public function users()
    {
        return $this->hasMany(User::class);
    }
}

中间件/ CheckRole.php

class User extends Authenticatable
{
    use Notifiable;

    protected $table = 'users';

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'role_id', 'username', 'firstname', 'lastname', 'active', 'email', 'password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

    public function role()
    {
        return $this->hasOne(Role::class);
    }

    private function checkIfUserHasRole($need_role)
    {
        return (strtolower($need_role) == strtolower($this->role->name)) ? true : null;
        return $need_role;
    }

    public function hasRole($roles)
    {
        if (is_array($roles))
        {
            foreach ($roles as $need_role)
            {
                if ($this->checkIfUserHasRole($need_role))
                {
                    return true;
                }
            }
        }
        else
        {
            return $this->checkIfUserHasRole($roles);
        }
        return false;
    }
}

web.php

class CheckRole
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $roles = $this->getRequiredRoleForRoute($request->route());
        if ($request->user()->hasRole($roles) || !$roles){
            return $next($request);
        }
        return redirect()->route('noPermissions');
    }

    private function getRequiredRoleForRoute($route)
    {
        $actions = $route->getAction();
        return isset($actions['roles']) ? $actions['roles'] : null;
    }
}

Answer 1

在User类中，您使用了错误的关系方法。尝试更改

public function role()
{
    return $this->hasOne(Role::class);
}

到

public function role()
{
    return $this->belongsTo(Role::class);
}

正如the documentation所说。 hasOne预计存在违规roles.user_id。