如何在Symfony 4中实现处理程序？

Question

According to the Datatable Symfony bundle documentation, I need to implement a handler.

You have to create a handler for each DataTable instance. A handler must implements the DataTableHandlerInterface interface. The only function this interface contains is handle :

  /**
   * Handles specified DataTable request.
   *
   * @param DataTableQuery $request
   *
   * @throws DataTableException
   * @return DataTableResults
   */
  public function handle(DataTableQuery $request): DataTableResults;

What I need to know is, where exactly do I have to put this code? In what folder and on what page?

Answer 1

You can put the handler file in src/DataTables/UsersDataTable.php for Symfony 4 projects.

In this file you will implement the request handler ( https://github.com/webinarium/DataTablesBundle/wiki#step-1-implement-request-handler ) Don't forget to register it as a service: https://github.com/webinarium/DataTablesBundle/wiki#step-2-register-the-handler

UsersDataTable.php

// src/DataTables/UsersDataTable.php
class UsersDataTable implements DataTableHandlerInterface
{
    ///
}

You register services in services.yaml

#config/services.yaml

services:
   datatable.users:
       class: App\DataTables\UsersDataTable
       tags: [{ name: datatable, id: users }]
       arguments: [ '@doctrine' ]

After this you can invoke the handler from a controller action https://github.com/webinarium/DataTablesBundle/wiki#step-3-invoke-the-handler

SomeController.php

// App\Controller\SomeController.php

public function usersAction(Request $request, DataTablesInterface $datatables): JsonResponse
{
   //
}

If you follow the instructions under: https://github.com/webinarium/DataTablesBundle/wiki#handlers-service-autoloading all your handlers will be autoloaded.