我有三个实体：服务，组，代理。
服务 =＆gt; oneToMany =＆gt; 群组 =＆gt; oneToMany =＆gt; 代理
这些实体中的每一个都有一个表单。 顺便说一句，我想创建一个自定义mergeForm，它将包含一个选择字段服务来选择，并选择一个选择字段 Groupe ，以便合并其中一些实体。 Symfony 2官方手册正在维护中，所以我想知道如何创建自定义表单，我可以在其中选择一个服务（来自所有现有服务）并选择一个组（来自所有现有组）< / p>
I have three entities : Service, Group, Agent.
Service => oneToMany => Group => oneToMany => Agent
Each of these entities already have a form. By the way, I would like to create a custom mergeForm which will contains a select field Service to choose and a select field Groupe in order to merge some of these entities. The Symfony 2 official cookbook is under maintenance, so I would like to know the way to create the custom Form in which I will be able to choose a Service (from all existing services) and to choose a Group (from all existing groups)
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