Question

因此，我创建了一个预订系统，您可以在其中创建地图并将其分配给活动。我有3个表events，maps和event_maps

在阅读了Laravel文档之后，我决定建立一个EmiratesToMany关系。

但是当我尝试通过事件模型来检索地图时，第一行只会得到一个。

在我的控制器中，我做

public function displayForm($id)
{
    $event = EventModel::find($id);
    print_r($event->maps);
}

结果是一个Illuminate \ Database \ Eloquent \ Collection对象，其中有2张地图中的最后一张，我一生都无法解决如何全部获得这些地图的问题。

我的事件模型

public function maps()
{
    return $this->belongsToMany('App\Models\Booky\MapsModel',
        // Table name of the relationship's joining table.
        'event_maps',
        // Foreign key name of the model on which you are defining the relationship
        'map_id',
        // Foreign key name of the model that you are joining to
        'event_id'
    );
}

我的MapsModel

public function event()
{
    return $this->belongsToMany('App\Models\Booky\EventsModel',
        // Table name of the relationship's joining table.
        'event_maps',
        // Foreign key name of the model on which you are defining the relationship
        'event_id',
        // Foreign key name of the model that you are joining to
        'map_id'
    );
}

数据库看起来像这样

events
  - id
  - lots of irrelevant data
maps
  - id
  - lots of irrelevant data
event_maps
  - id
  - event_id
  - map_id

我当时在想也许我应该使用其他关系类型，但是据我了解，他们不使用像event_maps这样的关系表。

其他所有操作都按预期进行。

任何人都可以清理这个烂摊子吗？：）

Answer 1

Array ( [Height] => 3/16 [Color] => Standard Red [Material] => Die-cut, pressure-sensitive paper [Package Quantity] => 1000/Pkg [Reusable] => Yes [Size] => 3/16 H x 1/4 W )的关系相反。试试这个：

id

并且：

public function maps()
{
    return $this->belongsToMany('App\Models\Booky\MapsModel',
        // Table name of the relationship's joining table.
        'event_maps',
        // Foreign key name of the model that you are joining to
        'event_id'
        // Foreign key name of the model on which you are defining the relationship
        'map_id',
    );
}

Laravel属于ToMany检索更多然后一行

1 个答案: