Laravel 在非对象上调用成员函数 create()

Question

我正在尝试使用一些模型工厂为数据库播种，但出现错误 call to member function create() on a non-object

以下是我的模型工厂：

$factory->define(App\Organisation::class, function ($faker) {
   return [
    'name' => $faker->company,
   ];
});

$factory->define(App\Department::class, function ($faker) {
   return [
    'name' => $faker->catchPhrase,
    'organisation_id' => factory(App\Organisation::class)->make()->id,
   ];
});

$factory->define(App\User::class, function ($faker) {
  return [
    'email' => $faker->email,
    'password' => str_random(10),
    'organisation_id' => factory(App\Organisation::class)->make()->id,
    'remember_token' => str_random(10),
  ];
});

在我的播种机中，我使用以下方法创建 2 个组织，并为每个组织关联一个用户和一个部门，然后让一个用户成为该部门的经理：

factory(App\Organisation::class, 2)
        ->create()
        ->each(function ($o)
        {
            $user = $o->users()->save(factory(App\User::class)->make());

            $department = $o->departments()->save(factory(App\Department::class)->make());

            $department->managedDepartment()->create([
                'organisation_id' => $o->id,
                'manager_id' => $user->id,
            ]);


        });

但是我得到了 fatalerorexception call to member function create() on a non-object

我以为$department是一个对象？

我的部门模型如下：

class Department extends Model
{

    protected $fillable = ['name','organisation_id'];

    public function organisation()
    {
        return $this->belongsTo('App\Organisation');
    }

    /* a department is managed by a user */
    public function managedDepartment()
    {
       $this->hasOne('App\ManagedDepartment');
    }
}

而我的managedDepartment模型如下：

class ManagedDepartment extends Model
{
    protected $table = 'managed_departments';


    protected $fillable = ['organisation_id', 'department_id', 'manager_id',];


    public function department()
    {
        $this->belongsTo('App\Department');
    }

    public function manager()
    {
        return $this->belongsTo('App\User');
    }
}

有人能帮忙吗？

Answer 1

尝试return你们的关系

    public function department()
    {
        return $this->belongsTo('App\Department');
    }

这里

 /* a department is managed by a user */
    public function managedDepartment()
    {
       return $this->hasOne('App\ManagedDepartment');
    }

我想它会解决你的问题。

Answer 2

首先，不要让外键可填充！其次，您在 ManagedDepartment 中的组织职能在哪里？你应该创建一个，否则以下将不起作用，因为关联是不可能的。第三，我认为你应该把下面的make()改成create()

$factory->define(App\Organisation::class, function ($faker) {
   return [
    'name' => $faker->company,
   ];
});

$factory->define(App\Department::class, function ($faker) {
   return [
    'name' => $faker->catchPhrase,
    'organisation_id' => factory(App\Organisation::class)->create()->id,
   ];
});

$factory->define(App\User::class, function ($faker) {
  return [
    'email' => $faker->email,
    'password' => str_random(10),
    'organisation_id' => factory(App\Organisation::class)->create()->id,
    'remember_token' => str_random(10),
  ];
});

此外：

factory(App\Organisation::class, 2)
    ->create()
    ->each(function ($o)
    {
        $user = factory(App\User::class)->create();
        $o->users()->attach($user->id);

        $department = factory(App\Department::class)->create();
        $o->departments()->attach($department);

        $managedDep = new ManagedDepartment();
        $managedDep->associate($o);
        $managedDep->associate($user);
        $managedDep->associate($department);
        $managedDep->save();
    });

Laravel 在非对象上调用成员函数 create()

Laravel call to member function create() on a non-object

php

factory

relationship

laravel-5.1