我得到的错误是"调用未定义的函数App \ belongsToMany"。
这是用于关系的两种模型之一:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Review extends Model
{
protected $table = "reviews";
protected $fillable = [ 'user_id','email','review'];
public function user()
{
return $this->belongsTo('App\User');
}
public function votes()
{
return $this->belongsToMany('App\User')->withPivot('vote')->withTimestamps();
}
public function categories()
{
return $this-belongsToMany('Category','category_review','review_id','category_id')->withTimestamps();
}
public function tags()
{
return $this->belongsToMany('App\Tag')->withTimestamps();
}
}
我的其他模特:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Category extends Model
{
public function reviews()
{
return $this->belongsToMany('App\Review','category_review','category_id','review_id')->withTimestamps();
}
public function children()
{
return $this->hasMany('App\Category','parent_id');
}
public function parent()
{
return $this->belongsTo('App\Category','parent_id');
}
}
问题是,我可以运行App \ Category :: find(1) - &gt; reviews;但是,我无法运行App \ Review :: find(1) - &gt;类别;它说&#34;调用未定义的函数App \ BelongsToMany&#34;
答案 0 :(得分:0)
categories()
方法中有两处错误。
public function categories()
{
return $this-belongsToMany('Category','category_review','review_id','category_id')->withTimestamps();
}
第一个错误是箭头。您放置了$this-belongsToMany
但它应该是$this->belongsToMany
。
第二个错误是命名空间。它应该是App\Category
。
总之,方法应该是:
public function categories()
{
return $this->belongsToMany('App\Category','category_review','review_id','category_id')->withTimestamps();
}