Symfony2一對一的關係形式

Question

我需要一些幫助來了解我做錯了什麼，我試着在這裏搜索一個答案，但沒有任何工作。

在這裏我的問題..

我有兩個實體有一個一對一的關係：

... 
class FarmInfo 
{ 
    ... 

    /** 
    * @var integer 
    * 
    * @ORM\Column(name="areaCovered", type="integer", nullable=true) 
    */ 
    private $areaCovered; 

    /** 
    * @var integer 
    * 
    * @ORM\Column(name="totalIrrigatedArea", type="integer", nullable=true) 
    */ 
    private $totalIrrigatedArea; 

    /** 
    * @var integer 
    * 
    * @ORM\Column(name="totalStaff", type="integer", nullable=true) 
    */ 
    private $totalStaff; 

    /** 
    * @var DairyInfo 
    * @ORM\OneToOne(targetEntity="DairyInfo", mappedBy="farmInfo", cascade={"persist","remove"}) 
    */ 
    private $dairyInfo; 

    ... 
} 

和

... 
class DairyInfo 
{ 
    ... 

    /** 
    * @var FarmInfo 
    * 
    * @ORM\OneToOne(targetEntity="FarmInfo", inversedBy="dairyInfo", cascade={"persist"}) 
    * @ORM\JoinColumn(name="farmInfoId", referencedColumnName="id") 
    * 
    */ 
    private $farmInfo; 

    /** 
    * @var integer 
    * 
    * @ORM\Column(name="peakCowMilked", type="integer", nullable=true) 
    */ 
    private $peakCowMilked; 

    /** 
    * @var integer 
    * 
    * @ORM\Column(name="cowsMilkedInWinter", type="smallint", nullable=true) 
    */ 
    private $cowsMilkedInWinter; 

    ... 
} 

這裏formTypes：

class FarmInfoType extends AbstractType 
{ 
    /** 
    * @param FormBuilderInterface $builder 
    * @param array $options 
    */ 
    public function buildForm(FormBuilderInterface $builder, array $options) 
    { 
     $builder->add('areaCovered'); 
     $builder->add('totalIrrigatedArea'); 
     $builder->add('totalStaff'); 

     $builder->add('dairyInfo', new DairyInfoType()); 
    } 

    /** 
    * @param OptionsResolverInterface $resolver 
    */ 
    public function setDefaultOptions(OptionsResolverInterface $resolver) 
    { 
     $resolver->setDefaults(array(
      'data_class' => 'FOO\CoreBundle\Entity\FarmInfo' 
     )); 
    } 

    /** 
    * @return string 
    */ 
    public function getName() 
    { 
     return 'foo_corebundle_farminfo'; 
    } 
} 

class DairyInfoType extends AbstractType 
{ 
    /** 
    * @param FormBuilderInterface $builder 
    * @param array $options 
    */ 
    public function buildForm(FormBuilderInterface $builder, array $options) 
    { 
     $builder->add('peakCowMilked'); 
     $builder->add('cowsMilkedInWinter'); 
    } 

    /** 
    * @param OptionsResolverInterface $resolver 
    */ 
    public function setDefaultOptions(OptionsResolverInterface $resolver) 
    { 
     $resolver->setDefaults(array(
      'data_class' => 'FOO\CoreBundle\Entity\DairyInfo' 
     )); 
    } 

    /** 
    * @return string 
    */ 
    public function getName() 
    { 
     return 'foo_corebundle_dairyinfo'; 
    } 
} 

創建表單我與FarmInfo和DairyInfo以相同的形式，我想，但我堅持，FarmInfo堅持OK和DairyInfo堅持所有領域，但farmInfoId總是空：

+---------------+--------------------+------------+ 
| peakCowMilked | cowsMilkedInWinter | farmInfoId | 
+---------------+--------------------+------------+ 
|   11 |     11 |  NULL | 
+---------------+--------------------+------------+ 

我有什麼做的到symfony自動獲取此ID？

謝謝大家的提前。

Answer 1

你沒有顯示你的方法，但我相當肯定你有：

class FarmInfo 
{ 
    setDairyInfo($dairyInfo) 
    { 
     $this->dairyInfo = $dairyInfo; 
    } 
} 

的問題是，沒有什麼是你dairyInfo類設置farmInfo。因此，修改setDairyInfo到：

setDairyInfo($dairyInfo) 
    { 
     $this->dairyInfo = $dairyInfo; 
     $dairyInfo->setFarmInfo($this); 
    } 

，你應該是好去。