Question

我将首先解释表格以及代码如何工作

表格

我有：

带有字段的项目：id，slug，order，public，pathheader和pathhome。
包含字段的project_translations：id，locale，project_id，title和caption。
具有字段的客户：id，name，slug和priority。
client_project，包含字段：id，client_id和project_id

代码如何运作

当我创建项目时，我也创建了两个项目翻译（每个区域设置一个，例如：＆＃39; es＆＃39;，＆＃39; en＆＃39;）。然后我选择一个客户端，这使得关系client_project。

当我删除项目时，我同时删除了具有相同project_id的project_translations和project_id相同的client_project行。

我想要什么

当我删除客户端时，删除字段client_id具有相同值的行（这是有效的），然后删除与我删除的客户端有关系的项目的项目和projects_translations。

我的功能如何看待

public function destroyClient($id) //Destruir cliente y todo lo relacionado de la bbdd
    {
        $cliente = Client::find($id); 
        $cliente->delete(); //delete the client
        DB::table('client_project')->where('client_id',$id)->delete(); //delete the client_project relations which field client_id is the same that the client i just deleted.

        return redirect()->route('admin.clients');
    }

Answer 1

希望这可以帮到你

public function destroyClient($id) //Destruir cliente y todo lo relacionado de la bbdd
    {
        $cliente = Client::find($id);
        $cliente_project = DB::table('client_project')->where('client_id', $id)->first();
        $project_id = $cliente_project->project_id;
        $cliente->delete(); //delete the client
        DB::table('client_project')->where('client_id',$id)->delete(); //delete the client_project relations which field client_id is the same that the client i just deleted.

        DB::table('projects')->where('id',$project_id)->delete();
        DB::table('project_translations')->where('project_id',$project_id)->delete();

        return redirect()->route('admin.clients');
    }

也许更好的方法是使用外出键

Answer 2

我想你可以试试这个：

public function destroyClient($id) //Destruir cliente y todo lo relacionado de la bbdd
{
    $cliente = Client::find($id); 
    $cliente->delete(); //delete the client
    $project = DB::table('client_project')->where('client_id',$id)->first();
    DB::table('client_project')->where('client_id',$id)->delete(); 


    DB::table('projects')->where('id',$project->project_id)->delete();

    DB::table('project_translations')->where('project_id',$project->project_id)->delete(); 


    return redirect()->route('admin.clients');
}

希望这对你有用!!!

Answer 3

以下代码将首先获得与客户相关的所有项目。然后将通过循环删除客户端的所有项目。

public function destroyClient($id) 
{
    $cliente = Client::find($id); 
    $cliente->delete(); //delete the client

    // get list of all projects of client
    $projects = DB::table('client_project')->where('client_id',$id)->get();

    DB::table('client_project')->where('client_id',$id)->delete(); 

    // delete all projects of client
    foreach($projects as $project)
    {
        DB::table('projects')->where('id',$project->id)->delete();

        DB::table('project_translations')->where('project_id',$project->id)->delete(); 
    }    

    return redirect()->route('admin.clients');
}

Laravel：用于删除数据的控制器功能

3 个答案: