Laravel 查询生成器枢轴 table 连接

Question

我正在尝试获取该国家/地区属于多对多关系区域的所有相关国家/地区。我想在查询生成器关系中使用它

这个我转table

 id         bigint unsigned auto_increment
        primary key,
    country_id bigint unsigned not null,
    region_id  bigint unsigned not null

区域模型

public function r_countries()
    {
        return $this->belongsToMany(Country::class, "country_regions","region_id","country_id");
    }


Country Model
   public function r_regions(): BelongsToMany
    {
        return $this->belongsToMany(Region::class, "country_regions", "country_id", "region_id");
    }

我把它绑起来了

$region = \App\Models\Country\Region::findOrFail(23);
$region->r_countries()->pluck("countries.title");

Answer 1

您可以使用

Model::whereHas('relation_name', function($query) use($varname){
         $query->where(condition);
})->get()

Laravel 查询生成器枢轴 table 连接

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