php – Entity的父项ID不会保存在SonataAdmin中的OneToMany关系中

我使用SonataAdmin(和Symfony2)来管理我的实体.我在一个步骤和许多任务之间有一个多关系.由于一步可以包含许多任务,当我创建一个步骤时,我想要能够创建许多任务,我希望这些任务链接到此步骤.为此,我创建了所有正确的管理类(一个用于Task,一个用于Step).

这是我做的,导致我的问题.当我尝试创建一个步骤时,我可以创建任务,甚至重新排序,这是非常好的,并且都由SonataAdminBundle自动完成.当我点击保存时,所有内容都保存在数据库中,除了在数据库中,步骤的ID不会在任务的行中设置.因此,任务没有与步骤…相关联

这是我的Step的管理类：

<?PHP
// src/Acme/DemoBundle/Admin/PostAdmin.PHP

namespace IMA\ProcessManagementBundle\Admin;

use Sonata\AdminBundle\Admin\Admin;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Form\FormMapper;

class StepAdmin extends Admin
{
    // Fields to be shown on create/edit forms
    protected function configureFormFields(FormMapper $formMapper)
    {
        $formMapper
            ->add('name','text',array('label' => 'Nom de l\'étape'))

            ->add('tasks','sonata_type_collection',array(),array(
                'edit' => 'inline','inline' => 'table','sortable'  => 'positionNumber'
            ))
            ->add('positionNumber','integer',array('label' => 'Position'))
        ;
    }

    // Fields to be shown on filter forms
    protected function configureDatagridFilters(DatagridMapper $datagridMapper)
    {
        $datagridMapper
            ->add('name')

        ;
    }

    // Fields to be shown on lists
    protected function configureListFields(ListMapper $listMapper)
    {
        $listMapper
            ->addIdentifier('name')
            ->add('slug')
        ;
    }
}

这也是我的任务管理类：

<?PHP
// src/Acme/DemoBundle/Admin/PostAdmin.PHP

namespace IMA\ProcessManagementBundle\Admin;

use Sonata\AdminBundle\Admin\Admin;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Form\FormMapper;

class TaskAdmin extends Admin
{
    // Fields to be shown on create/edit forms
    protected function configureFormFields(FormMapper $formMapper)
    {
        $formMapper
            ->add('name',array('label' => 'Tâche'))
            ->add('positionNumber',array('label' => 'Position'))

        ;
    }

    // Fields to be shown on filter forms
    protected function configureDatagridFilters(DatagridMapper $datagridMapper)
    {
        $datagridMapper
            ->add('name')

        ;
    }

    // Fields to be shown on lists
    protected function configureListFields(ListMapper $listMapper)
    {
        $listMapper
            ->addIdentifier('name')
            ->add('slug')
        ;
    }
}

另外,这里是我的实体的描述

IMA\ProcessManagementBundle\Entity\Step:
    type: entity
    table: null
    fields:
        id:
            type: integer
            id: true
            generator:
                strategy: AUTO
        name:
            type: string
            length: 255
        positionNumber:
            type: integer


    onetoMany:
        tasks:
            targetEntity: Task
            mappedBy: step
            cascade: ["persist","merge"]

    lifecycleCallbacks: {  }


IMA\ProcessManagementBundle\Entity\Task:
    type: entity
    table: null
    fields:
        id:
            type: integer
            id: true
            generator:
                strategy: AUTO
        name:
            type: string
            length: 255
        positionNumber:
            type: integer


    manyToOne:
        step:
            targetEntity: Step
            inversedBy: tasks


    lifecycleCallbacks: {  }

我想知道为什么步骤的id不在任务行中设置…

<?PHP
namespace IMA\ProcessManagementBundle\Admin;

use Sonata\AdminBundle\Admin\Admin;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Form\FormMapper;

class StepAdmin extends Admin
{
    // Fields to be shown on create/edit forms
    protected function configureFormFields(FormMapper $formMapper)
    {
        $formMapper
            ->add('name',array('label' => 'Position'))
        ;
    }

    // Fields to be shown on filter forms
    protected function configureDatagridFilters(DatagridMapper $datagridMapper)
    {
        $datagridMapper
            ->add('name')

        ;
    }

    // Fields to be shown on lists
    protected function configureListFields(ListMapper $listMapper)
    {
        $listMapper
            ->addIdentifier('name')
            ->add('slug')
        ;
    }


    public function prePersist($object)
    {
        foreach ($object->getTasks() as $task) {
            $task->setStep($object);
        }
    }

    public function preUpdate($object)
    {
        foreach ($object->getTasks() as $task) {
            $task->setStep($object);
        }
    }


}