Php 具有返回不准确结果的关系的Laravel

我正在尝试进行查询，以获取所有面试，并在companys表中获取公司名称。我只想返回company表中的name列

我运行了一个查询日志，发现我的关系返回了一个奇怪的查询

Laravel版本6.5.2

我原来拥有的

$interviews = Interview::select('title', 'slug', 'subtitle', 'posted_date')
                                    ->orderBy('created_at', 'DESC')
                                    ->with(['company' => function($query) {
                                        $query->select('id','name');
                                    }])
                                    ->get();

我现在用什么来测试关系是否正常：

\DB::enableQueryLog();

$interviews = Interview::select('title', 'slug', 'subtitle', 'posted_date')
                                    ->orderBy('created_at', 'DESC')
                                    ->with('company')
                                    ->get();
dd(\DB::getQueryLog());

public function interview() {
        return $this->hasOne('App\Interview', 'company_id', 'id');
    }

public function company() {
        return $this->belongsTo('App\Company', 'id', 'company_id');
    }

select `title`, `slug`, `subtitle`, `posted_date` from `interviews` where `interviews`.`deleted_at` is null order by `created_at` desc

select * from `companies` where 0 = 1 and `companies`.`deleted_at` is null

公司模式：

\DB::enableQueryLog();

$interviews = Interview::select('title', 'slug', 'subtitle', 'posted_date')
                                    ->orderBy('created_at', 'DESC')
                                    ->with('company')
                                    ->get();
dd(\DB::getQueryLog());

public function interview() {
        return $this->hasOne('App\Interview', 'company_id', 'id');
    }

public function company() {
        return $this->belongsTo('App\Company', 'id', 'company_id');
    }

select `title`, `slug`, `subtitle`, `posted_date` from `interviews` where `interviews`.`deleted_at` is null order by `created_at` desc

select * from `companies` where 0 = 1 and `companies`.`deleted_at` is null

面试模式：

\DB::enableQueryLog();

$interviews = Interview::select('title', 'slug', 'subtitle', 'posted_date')
                                    ->orderBy('created_at', 'DESC')
                                    ->with('company')
                                    ->get();
dd(\DB::getQueryLog());

public function interview() {
        return $this->hasOne('App\Interview', 'company_id', 'id');
    }

public function company() {
        return $this->belongsTo('App\Company', 'id', 'company_id');
    }

select `title`, `slug`, `subtitle`, `posted_date` from `interviews` where `interviews`.`deleted_at` is null order by `created_at` desc

select * from `companies` where 0 = 1 and `companies`.`deleted_at` is null

结果：

\DB::enableQueryLog();

$interviews = Interview::select('title', 'slug', 'subtitle', 'posted_date')
                                    ->orderBy('created_at', 'DESC')
                                    ->with('company')
                                    ->get();
dd(\DB::getQueryLog());

public function interview() {
        return $this->hasOne('App\Interview', 'company_id', 'id');
    }

public function company() {
        return $this->belongsTo('App\Company', 'id', 'company_id');
    }

select `title`, `slug`, `subtitle`, `posted_date` from `interviews` where `interviews`.`deleted_at` is null order by `created_at` desc

select * from `companies` where 0 = 1 and `companies`.`deleted_at` is null

我试图弄清楚为什么它返回

，其中0=1

，而不是实际的模型

---

另外，是否有一种方法可以只返回上面类似I的字段之一？

找到了答案。您必须在原始查询中指定

id

和

company\u id

，才能使其正常工作

$interviews = Interview::select('id', 'title', 'company_id', 'slug', 'subtitle', 'posted_date')
  ->orderBy('created_at', 'DESC')
  ->with(['company:id,name'])
  ->get();

看看这个：