Laravel雄辩的拯救关系模型失败

Question

我有拉勒维尔雄辩的Collage班

class Collage extends Model
{

    /**
     * Get the User that owns this Collage.
     */
    public function user()
    {
        return $this->belongsTo('App\User');
    }
}

拼贴迁移模式

Schema::create('collages', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('user_id')->unsigned();
            $table->string('name')->nullable();
            $table->timestamps();
        });

和User

class User extends Authenticatable
{
    /**
     * Get all Collages that belongs to this User.
     */
    public function collages()
    {
      return $this->hasMany('App\Collage');
    }
}

但当我在小叮当上这么做

$user = App\User::find(1)->first();
$collage = new App\Collage;
$collage->name = 'Collage';
$collage->user = $user;

//and save
$collage->save();

抛出错误QueryException

General error: 1 table collages has no column named user

Answer 1

Change

$collage->user = $user

到

$collage->user_id = $user->id

Answer 2

更新架构以建立关系，

Schema::create('collages', function (Blueprint $table) {
    $table->increments('id');
    $table->integer('user_id')->unsigned();
    $table->foreign('user_id')->references('id')->on('users');
    $table->string('name')->nullable();
    $table->timestamps();
});

这样，Laravel雄辩者就会自动提及这段关系。