我试图将数据写入数据透视表，但我得到"在null上调用成员函数guests() "
这是我的代码，我哪里出错了?
我已经试过了，我很困惑什么是错的
事件模型
<?php
namespace App'Models;
use Illuminate'Database'Eloquent'Model;
class Event extends Model
{
/**
* The table associated with the model.
*
* @var string
*/
protected $table = 'events';
/**
* The attributes that are mass assignable.
*
* @var array
*/
protected $fillable = ['headline', 'description', 'address', 'zip', 'longitude', 'latitude',
'position', 'country_id', 'cat_id', 'start_date', 'end_date'];
public function user()
{
return $this->belongsTo('App'User');
}
/**
* The products that belong to the shop.
*/
public function guests()
{
return $this->belongsToMany('App'Models'Guest', 'event_guest', 'guest_id', 'event_id');
}
}
<?php
namespace App'Models;
use Illuminate'Database'Eloquent'Model;
class Guest extends Model
{
protected $fillable = ['first_name', 'last_name', 'email'];
public function events()
{
return $this->belongsToMany('App'Models'Event', 'event_guest', 'event_id', 'guest_id');
}
}
//RSVP events
public function rsvpCheck()
{
$check = Guest::find(5);
//$guestCheck = Event::where('id',5)->first();
$check->events()->attach(2);
return $check->events;
}
按照@Mike的建议改变你的关系方法
在事件模型中更改guests()方法如下:
public function guests()
{
return $this->belongsToMany('App'Models'Guest');
}
在客户模型中更改events()方法，如下所示:
public function events()
{
return $this->belongsToMany('App'Models'Event');
}
现在，要向数据透视表中插入数据，有两种情况:
1)无数据
public function rsvpCheck()
{
$check = Guest::findOrFail(5);
$check->events()->attach(2);
return $check->events();
}
2)数据透视表
public function rsvpCheck()
{
$data = ['attribute'=>'value'];//replace this with the data you want to insert
$check = Guest::findOrFail(5);
$check->events()->attach(2,$data);
return $check->events();
}
试着这样做。将此添加到create_events_migration
下面 Schema::create('event_guest', function (Blueprint $table) {
$table->integer('event_id')->unsigned()->index();
$table->foreign('event_id')->references('id')->on('events');
$table->integer('guest_id')->unsigned()->index();
$table->foreign('guest_id')->references('id')->on('guests');
});
在Event模型中使用这个关系
public function guests()
{
return $this->belongsToMany(Guest::class); // include at the top: use App'Models'Guest;
}
在Guest模型中
public function events()
{
return $this->belongsToMany(Event::class); // include at the top: use App'Models'Event;
}
在数据库中添加一些虚拟数据(事件和来宾之间的关系)，并将此代码粘贴到您的路由
Route::get('/testguest', function(){
$guest= Guest::first();
dd($company->events);
});
，反之
路线:get (/testevents,函数(){
$event= Event::first();
dd($event->guests);
});
让我知道你是否能工作到目前为止，并得到你的虚拟数据