Laravel 5 查询关系

Question

这里是关系 1 的代码：

/**
 *
 * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
 */
public function address()
{
    return $this->hasMany('App\IPAddress', 'group_id');
}

和关系2代码：

/**
 *
 * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
 */
public function group()
{
    return $this->belongsTo('App\IPGroups');
}

I want to get all ip addresses that belongs to specified group. I don't want to write raw queries, I need to be done with querying relationship. Does anyone has an idea?

我试过这样做：

 /**
 * Get IP Addresses of specified group
 * @param Request $request
 * @return mixed
 */
public function getIP(Request $request)
{
    $group = IPGroups::findOrFail($request->group_id);
    return $group->address;
}

but I need to add one where statement where I can pick only active ip addresses.

这是模型 1 代码：

    namespace App;

use Illuminate\Database\Eloquent\Model;

class IPGroups extends Model
{
    /**
     * Working Table
     * @var string
     */
    protected $table = 'ip_groups';

    /**
     * Guarded Values From Mass Assignment
     * @var array
     */
    protected $guarded = [ 'id' ];

    /**
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function address()
    {
        return $this->hasMany('App\IPAddress', 'group_id');
    }
}

和第二个模型代码：

    namespace App;

use Illuminate\Database\Eloquent\Model;

class IPAddress extends Model
{
    /**
     * Working Table
     * @var string
     */
    protected $table = 'ips';

    /**
     * Protected Values From Mass Assignment
     * @var array
     */
    protected $fillable = [ 'group_id', 'ip', 'description', 'status' ];

    /**
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function group()
    {
        return $this->belongsTo('App\IPGroups');
    }
}

Answer 1

试试这个，只获取状态为 'Active':

的地址

return $group->address->where('status','Active');

这不起作用的原因：

return $group->address->where('status','=','Active');

是我们这里使用的where是classCollection的where，它不接受比较器作为第二个参数作为where 的 Model 做。

Laravel 5 查询关系

Laravel 5 Querying Relationship

relationship

laravel

eloquent