[英]Laravel 5.3 : Many to many realtionship's data
I have ,many to many relationship between User
and Project
我与
User
和Project
之间有很多关系
Realtionship Names are : User
model have projects
and Project
model have users
. 房地产名称是:
User
模型具有projects
, Project
模型具有users
。 And are correctly formed. 并正确形成。
I am using the following code for the data tables : 我在数据表中使用以下代码:
public function handleProjects(Request $request)
{
$responseData = \App\Misc::handleDatatable([
"request" => $request,
"model" => "\App\Project",
"actions" => [
"delete" => function($records) {
foreach($records as $record) {
$record->delete();
}
return [
"status" => "OK",
"message" => "Successfully deleted the selected product types!",
];
},
],
"columns" => [
"title" => "title",
"users.username" => "users.username",
"level" => "level",
"users.username" => "users.username",
"created_at" => function($value) {
return $value->diffForHumans();
}
],
]);
return response()->json($responseData);
}
Note the "users.username" => "users.username",
last 8th line, How can i get the username from the users
table ? 注意
"users.username" => "users.username",
最后八行,如何从users
表中获取用户名?
The relationship names are mentioned above. 关系名称如上所述。
And it gives me the following error : 它给了我以下错误:
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'users.username' in 'field list' (SQL: SELECT projects.*, categories.name AS b74HW, subcategory.name AS rLTng, users.username AS fUfHg from `projects` left join `categories` as `categories` on `categories`.`id` = `projects`.`categories_id` left join `sub_category` as `subcategory` on `subcategory`.`id` = `projects`.`subcategory_id` group by `id` order by `projects`.`id` desc limit 15 offset 0)
The error is pretty straight. 错误很直接。 You are not using join on query so it's assuming you have a column called users.username and you have a column username in users table.
您没有在查询中使用联接,因此假设您有一个名为users.username的列,并且在users表中有一个列的用户名。
How are you calling the relation? 您如何称呼关系? Something like:
就像是:
$data = Users::find(1)->with('projects')->get(); //this user with id 1, and eager load the relation.
Also don't forget to loop trough the results like: 另外,不要忘记循环遍历以下结果:
foreach($data->projects as $project) { ... }
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