Laravel (5.7) Eloquent Many to Many with query on双方
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【中文标题】Laravel (5.7) Eloquent Many to Many with query on双方【英文标题】:Laravel (5.7) Eloquent Many to Many with query on both sides 【发布时间】:2019-04-20 13:07:16 【问题描述】:假设我有一个用户、角色和一个数据透视表。我为 Role 和 User 设置了 belongsToMany。
用户模型:
<?php
namespace App;
...
use App\Models\Role;
class User extends Authenticatable
...
public function roles()
return $this->belongsToMany(Role::class, "UserRoles", "userId", "roleId")
->withPivot("read", "write", "update", "delete")
->withTimestamps();
榜样:
<?php
namespace App\Models;
...
use App\User;
class Role extends Model
...
public function users()
return $this->belongsToMany(User::class, "UserRoles", "roleId", "userId")
->withPivot("read", "write", "update", "delete")
->withTimestamps();
表“用户”:
userId username
1 admin
2 johndoe
3 menghour
表“角色”:
roleId roleName
1 Admin
2 HR
3 Account
数据透视表“UserRoles”:
id userId roleId read write update delete
1 1 1 1 1 1 1
2 1 2 1 1 1 1
3 1 3 1 1 1 1
4 2 2 1 0 0 0
5 3 3 1 1 1 0
我的问题是如何在数据透视表中获取过滤器。
例如:我只想过滤userId
或roleId
或两者都过滤userId and roleId
如果我在刀片模板中选择user = admin
,我想获取用户拥有的所有角色。
预期结果:
username roleName
admin Admin
admin HR
admin Account
如果我在刀片模板中选择选项role = HR
,我想获得该角色拥有的所有用户。
预期结果:
username roleName
admin HR
johndoe HR
如果我选择选项user = admin
和role = HR
,我只想获取特定的用户和角色。
预期结果:
username roleName
admin HR
我累了:
User::whereHas("roles", function ($query) use ($request)
if ($request->userId)
$query->where("userRoles.userId", "=", $request->userId);
if ($request->roleId)
$query->where("userRoles.roleId", "=", $request->roleId);
)->get();
注意:我使用的是 Laravel 5.7
【问题讨论】:
【参考方案1】:您可以尝试使用此查询根据您的示例过滤数据。
函数whereHas
用于检索具有给定角色的所有用户。要获取用户的角色,您必须使用with
函数。
$user = User::whereHas('roles', function ($query) use ($request)
if ($request->roleId)
$query->where("userRoles.roleId", "=", $request->roleId);
)
// It will give you the user's role data.
->with('roles');
// It will check in users table if you have applied the filter by user.
if ($request->userId)
$user = $user->where("users.id", "=", $request->userId);
$user = $user->get();
您还可以尝试使用此查询来根据您的示例过滤数据。此查询将为您提供具有您在角色对象中给出的特定角色的用户。 例如:如果您在刀片模板中选择选项角色 = HR。
$user = User::whereHas('roles', function ($query) use ($request)
if ($request->roleId)
$query->where("userRoles.roleId", "=", $request->roleId);
)
// It will give you the user data with a particular given role which you has passed in the request.
->with(['roles' => function($query) use($request)
if ($request->roleId)
$query->where("roles.id", "=", $request->roleId);
]);
// It will check in users table if you have applied the filter by user.
if ($request->userId)
$user = $user->where("users.id", "=", $request->userId);
$user = $user->get();
【讨论】:
你救了我的命。非常感谢。【参考方案2】:您可以尝试wherePivot()
或wherePivotIn()
方法:
User::roles()->wherePivot('roleId',$request->roleId)
->wherePivot('userId',$request->userId)
->get()
https://laravel.com/docs/5.7/eloquent-relationships#many-to-many
【讨论】:
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