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[英]How do I use Eloquent to get all relationships from an intermediate table?
[英]How to get data from intermediate table in eloquent, silex
我创建了数据库表users
, groups
和group_user
(MySQL)。而group_user
表(中间表)包含user_id
和role_id
。 用户和群体的关系是多对多的。 我想删除groups
表中的groups
。 在删除组之前,我想检查是否有任何用户属于该组。 我试着这样做。
Group.php(型号)
public function users()
{
return $this->belongsToMany('\Modules\User\Models\User');
}
Service.php
public function deleteGroup($data) {
if (!isset($data['groupID']))
return ['error' => 'Failed to delete group. Group id is required'];
$group = Group::find($data['groupID']);
if (!$group)
return ['error' => 'Failed to delete group. Group not found'];
// check any user belongs to group.
$result = $group->users()->pivot->user_id;
if(!$result){
$group->delete();
return ['success' => 'Successfully delete group.'];
}
return ['error' => 'Failed to delete group. Group not found'];
}
但这不起作用。
我发现了。
service.php
public function deleteGroup($data) {
$group = Group::find($data['groupID']);
if (!$group){
return [
"msg" => "Failed to delete group. Group not found."
];
}
// find out any one belongs to the group.
$result = $group->users->first()->userID;
if ($result){
return [
"msg" => "Failed to delete group. Group has users."
];
}
$result = $group->delete($data['groupID']);
if(!$result){
return [
"msg" => "Failed to delete group."
];
}
return [
"msg" => "Successfully deleted group."
];
}
我就是这样做的。 如果还有其他方式请告诉我。 谢谢。
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