問題描述

我遇到了一個問題，我必須根據模型的關系數據對模型集合進行排序/排序.

I'm stuck with a problem where I have to sort / order a collection of models by their relationship's data.

我的設置如下:

型號:User、Team、TeamUser、Role

TeamUser 模型是一個數據透視模型/表(包含 user_id 和 team_id.如果值得一提，我也使用 spatie/laravel-permissions角色.

The TeamUser model is a pivot model / table (containing user_id and team_id. If it's worth mentioning I am also using spatie/laravel-permissions for the roles.

如果我想按role.name 對團隊中的用戶進行排序，我該怎么做?我正在談論 Team 模型中的 users() 關系(請參閱代碼示例的進一步內容).一些用戶具有 team-leader 角色，大多數用戶具有 team-seller 角色.我試過做一個普通的 ..->sortBy('role.name') 但這似乎不起作用.如果有人可以幫助我，請提前致謝.

How would I go forth when I want to sort the users in a team by their role.name? I'm talking about the users() relation in the Team model (see further down for code sample). Some users have the role team-leader and most have the role team-seller. I've tried doing a ordinary ..->sortBy('role.name') but that doesn't seem to work. Thanks in advance if anyone could help me out.

User.php

/**
 * Team relation
 *
 * @return IlluminateDatabaseEloquentRelationsBelongsToMany
 */
public function team()
{
    return $this->belongsToMany('AppTeam', 'team_users', 'user_id', 'team_id');
}

Team.php

/**
 * User relation
 *
 * @return IlluminateDatabaseEloquentRelationsBelongsToMany
 */
public function users()
{
    return $this->belongsToMany('AppUser', 'team_users', 'team_id', 'user_id')->withTimestamps();
}

推薦答案

如果要根據嵌套關系列對結果進行排序，則必須使用連接鏈:

if you want to order the result based on nested relation column, you must use a chain of joins:

$values = Team::query()
      ->leftJoin('users', 'users.team_id', '=', 'teams.id')
      ->leftJoin('model_has_roles', function ($join) {
          $join->on('model_has_roles.model_id', '=', 'users.id')
               ->where('model_has_roles.model_type', '=', 'appModelsUser');
      })
      ->leftJoin('roles', 'roles.id', '=', 'model_has_roles.role_id')
      ->orderBy('roles.name')
      ->get();

我試過了，效果很好.

請注意，如果您想按多列排序，您可以根據需要添加 'orderBy' 子句:

please note that if you want to order by multiple columns you could add 'orderBy' clause as much as you want:

->orderBy('roles.name', 'DESC')->orderby('teams.name', 'ASC') //... ext

這篇關于Laravel eloquent按關系模型上的角色名稱排序的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！