Question

我有点卡在这... 我有3个表：摄影师，语言和languages_spoken（中间表）。

我正在尝试检索摄影师所说的所有语言。我定义了这样的模型：

class Photographer extends Eloquent {
/**
 * Defining the many to many relationship with language spoken
 * 
 */
public function languages() {
    return $this->belongsToMany('Language', 'languages_spoken', 'language_id', 'photographer_id');
}
class Language extends Eloquent {
/**
 * Defining the many to many relationship with language spoken
 * 
 */
public function photographers() {
    return $this->belongsToMany('Photographer', 'languages_spoken', 'language_id', 'photographer_id')
        ->withPivot('speakslanguages');
}

这就是我试图检索登录摄影师的所有结果的方法：

 $photographer   = Photographer::where('user_id', '=', $user->id);

            if ($photographer->count()) {
                $photographer       = $photographer->first();

                // TEST

                $spokenlang         = $photographer->languages;
                die($spokenlang);

                // END TEST

            } else {
                return App::abort(404);
            }

问题是在我的数据库中我有4个同一摄影师的条目。但是当我这样做时，我只得到最后的结果......

[{＆＃34; ID＆＃34;：＆＃34; 3＆＃34;＆＃34; LANGUAGE_NAME＆＃34;：＆＃34;南非荷兰语＆＃34;＆＃34;的updated_at＆＃ 34;：＆＃34; -0001-11-30 00：00：00＆＃34;，＆＃34; created_at＆＃34;：＆＃34; -0001-11-30 00：00：00＆＃34;，＆＃34; native_name＆＃34;：＆＃34;南非荷兰语＆＃34;＆＃34; ISO639_1＆＃34;：＆＃34; AF＆＃34;＆＃34;枢轴＆＃34; {＆＃34; LANGUAGE_ID＆＃34;：＆＃34; 3＆＃34;＆＃34; photographer_id＆＃34;：＆＃34; 3＆＃34;}}]

对于什么是错误的任何想法？

非常感谢你的帮助!!!

Answer 1

belongsToMany的第三个参数应该是 foreign 键。

在摄影师课上：

public function languages() {
    return $this->belongsToMany('Language', 'languages_spoken', 'language_id', 'photographer_id');
}

......应该是：

public function languages() {
    return $this->belongsToMany('Language', 'languages_spoken', 'photographer_id');
}

在语言课程中：

public function photographers() {
    return $this->belongsToMany('Photographer', 'languages_spoken', 'language_id', 'photographer_id')
    ->withPivot('speakslanguages');
}

应该是：

public function photographers() {
    return $this->belongsToMany('Photographer', 'languages_spoken', 'language_id')
    ->withPivot('column1', 'column2', 'column3'); // withPivot() takes a list of columns from the pivot table, in this case languages_spoken
}

但是，由于你甚至没有使用奇怪的键，你根本不需要传递第三个参数。

所以这很好：

public function languages() {
    return $this->belongsToMany('Language', 'languages_spoken');
}

和

public function photographers() {
    return $this->belongsToMany('Photographer', 'languages_spoken')
    ->withPivot('column1', 'column2', 'column3'); // withPivot() takes a list of columns from the pivot table, in this case languages_spoken
}

laravel 4无法检索所有结果？枢轴表多对多

1 个答案: