首先让我为模糊的标题道歉,我无法找到适当的方法来制定它。
至于问题,在这个例子中,我想将用户绑定到具有特定角色的项目。我试图通过以下数据透视表执行此操作:
|user_has_projects|
|-----------------|
|id |
|user_id |
|projectrole_id |
|project_id |
|created_at |
|updated_at |
|deleted_at |
|-----------------|
users
,projects
和projectroles
表格是您对表格的期望。
每个模型的当前雄辩关系如下:
Project.php
:
public function users()
{
return $this->belongsToMany(
"App\User",
"user_has_projects"
)->withPivot(
"user_id"
)->withTimestamps();
}
public function userProjects()
{
return $this->hasMany(
"App\UserProjects",
"project_id",
"id"
);
}
Users.php
:
public function projects()
{
return $this->belongsToMany(
'App\Project',
'user_has_projects'
)->withPivot(
'project_id'
);
}
public function projectRole($id)
{
return $this->belongsToMany(
"App\ProjectRole",
"user_has_projects"
)->withPivot(
"projectrole_id"
)->wherePivot(
"project_id",
'=',
$id
);
}
ProjectRole.php
:
public function user()
{
return $this->belongsToMany(
"App\User",
"user_has_projects"
)->withPivot(
"user_id"
)->withTimestamps();
}
public function projects()
{
return $this->belongsToMany(
"App\Project",
"user_has_projects"
)->withPivot(
"project_id"
)->withTimestamps();
}
UserProjects.php
:
public function projectRoles()
{
return $this->belongsTo(
'App\ProjectRoles'
);
}
public function users()
{
return $this->belongsTo(
'App\User'
);
}
public function projects()
{
return $this->belongsTo(
'App\Project'
);
}
现在,如果我想要检索绑定到项目的所有用户,然后检查他们在项目中的角色,我将首先调用
$aBoundUsers = $oProject->users();
然后循环遍历这些用户以获得
foreach($aBoundUsers as $oUser) {
$role = $oUser->projectRole($oProject->id);
}
然而,当我致电$oUser->projectRole(...)
时,我收到以下错误:
"在boolean"上调用成员函数projectRole();
经过一番彻底的搜索,我发现唯一返回的是
{"withTimestamps":true}
我在这里做错了什么?我找到了一些有多个模型的数据透视表的解决方案,但没有一种工作方式。
答案 0 :(得分:0)
$oProject->users()
仅返回关系,$oProject->users
返回结果。
更改UserProjects
模型的父类:
class UserProjects extends \Illuminate\Database\Eloquent\Relations\Pivot
然后调整您的Project
型号:
public function users()
{
return $this->belongsToMany(
"App\User",
"user_has_projects"
)->withPivot(
"user_id", "projectrole_id"
)->using("App\UserProjects")
->withTimestamps();
}
然后你可以像这样访问你的角色:
foreach($oProject->users as $oUser) {
$role = $oUser->pivot->projectRoles;
}