Laravel Eloquent-将数据透视表的ID用作另一个表中的外键 [英] Laravel Eloquent - Using pivot table's id as a foreign key in another table

问题描述

我需要将数据透视表的ID用作另一个表中的外键.

I need to use pivot table's id as a foreign key in another table.

例如，我有以下表格:

users: id, username, ...

places: id, placename, lat, lng, ...

place_user: id, user_id, place_id

routes: place_user_id, lat, lng, inserted_at.

因此，当用户说我要去那个地方时，我在place_user表中有了一个新条目，并开始记录他到达那里的路线.因此，对于每个place_user条目，我在路由表中都有很多条目.

so when user says I am going to that place, I have a new entry in place_user table and start to log the route he takes to get there. So for each place_user entry i have many entries in routes table.

用雄辩的方式建立这种关系的正确方法是什么?我应该为数据透视表创建模型吗?

what is the correct way of doing this kind of relationship using eloquent? Should I create a model for the pivot table?

我已经尝试通过以下解决方案来解决我的问题，但是没有运气: https://github.com. com/laravel/framework/issues/2093#issuecomment-39154456 并在其中发表评论 https: //github.com/laravel/framework/issues/2093#issuecomment-58187802

I have tried to solve my problem by the following solution but no luck: https://github.com/laravel/framework/issues/2093#issuecomment-39154456 and posted a comment there https://github.com/laravel/framework/issues/2093#issuecomment-58187802

任何建议将不胜感激.

推荐答案

经过大量搜索并尝试了不同的解决方案后，我想到了以下解决方案:

After lots of searching and trying different solutions I came up with the following solution:

用户模型:

class User extends \Eloquent {
    public function places() {
        return $this->hasMany('PlaceUser')->with('Place');
    }
}

位置模型:

class Place extends \Eloquent {
    public function users() {
        return $this->hasMany('PlaceUser')->with('User');
    }
}

PlaceUser模型:

class PlaceUser extends \Eloquent {

    public function user() {
        return $this->belongsTo('User');
    }

    public function place() {
        return $this->belongsTo('Place');
    }

    public function footprints() {
        return $this->hasMany('Footprint');
    }
}

我已将名称路由更改为足迹，以避免laravel中包含的路由类出现问题.

I have Changed name route to footprint to avoid problems with route class included in laravel.

足迹模型:

class Footprint extends \Eloquent {
    public function place_user()
    {
        return $this->belongsTo('PlaceUser');
    }
}

最后，我得到了可以进行如下查询的结构:

In the end I get structure where I can make different queries like:

// gets all places with corresponding pivot table entries and users table entries    
Place::with('users')->get(); 
// get user with id=1 including corresponding pivot table entries and places table entries
User::with('places')->find(1); 
// get footprint of the user
$user->places->get(0)->footprints 

希望这会有所帮助

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