php - Eloquent 地处理多个表数据和关系

Question

我有这 3 个表:

  Schema::create('companies', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('city_id')->unsigned();
            $table->string('name');
            $table->string('address');
            $table->float('lat', 10,6);
            $table->float('lng', 10,6);
            $table->timestamps();

            $table->foreign('city_id')->references('id')->on('cities');
        });

Schema::create('company_clients', function (Blueprint $table) {
    $table->increments('id');
    $table->integer('company_id')->unsigned();
    $table->integer('client_id')->unsigned();

    $table->foreign('company_id')->references('id')->on('companies');
    $table->foreign('client_id')->references('id')->on('companies');
});

Schema::create('cities', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name');
});

现在，我想要一个 Eloquent 查询，它将返回一个公司数组(不仅仅是一项)，其中(例如)company_clients 表上的company_id=1。另外，city_id 应该使用城市表返回名称而不是 id。我现在无法想象该怎么做。我做了:

class City extends Model
{
    protected $table = 'cities';

    public $timestamps = false;

    protected $fillable = [
        'name',
    ];


    public function companies()
    {
        return $this->hasMany('App\Company', 'city_id', 'id');
    }
} 

class CompanyClients extends Model
{
    protected $table = 'company_clients';

    public $timestamps = false;

    protected $fillable = [
        'company_id', 'client_id',
    ];

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

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

class Company extends Model
{
    protected $table = 'companies';

    protected $fillable = [
        'name', 'address', 'lat', 'lng', 'city_id',
    ];

    protected $hidden = [
        'clients', 'created_at', 'updated_at',
    ];

    public function city()
    {
        return $this->belongsTo('App\City', 'city_id', 'id');
    }

    public function companies()
    {
        return $this->hasMany('App\CompanyClients', 'company_id', 'id');
    }

    public function clients()
    {
        return $this->hasMany('App\CompanyClients', 'client_id', 'id');
    }
}

但是，我缺少 Controller 中的代码。我尝试过:

$result = Company::leftJoin('company_clients', function($join) {
            $join->on('companies.id', '=', 'company_clients.company_id');
        })->where('company_clients.company_id', '=', 1 )->get();

或

    $result = Company::with(['clients' => function($q){
        $q->where('company_id', 1);
    }])->get();

但没有返回正确的结果。我缺少什么？

谢谢!

编辑:我找到了一种方法，但我不确定是否是最好的方法。有人可以确认一下吗？

    $result = Company::join('company_clients', function($join) {
        $user = Auth::guard('api')->user();
        $join->on('companies.id', '=', 'company_clients.client_id')->where('company_clients.company_id', '=', $user->company_id );
    })->join('cities', 'cities.id', '=', 'companies.city_id')->get(array('companies.*', 'cities.name'));

Answer 1

尝试

CompanyClients::with('company.city', 'clients')->where('company_id', 1)->get();

重命名

companies

CompanyClients 模型与

的关系

company