Symfony2 Form Builder中实体支持的日期字段的默认值 [英] Default value for entity backed Date field in Symfony2 Form Builder

问题描述

好的，我有下面描述的FormType。我使用这个Form类创建和编辑表单。我决定设置一个默认日期（ from_date 和 to_date ），使用 data 属性在选项数组中。这在确定默认日期方面做得很好，实际上，这是一份太好的工作。它也覆盖了编辑表格中的现有日期，这实在是不好。

如何设置真正的默认值，而不是'always'value？

 <？php 
 
命名空间TechPeople\InvoiceBundle\Form; 
 
使用Symfony \Component\Form\AbstractType; 
使用Symfony \Component\Form\FormBuilderInterface; 
使用Symfony \ Component\OptionsResolver\OptionsResolverInterface; 
使用Symfony \ Component \Security\Core\SecurityContext; 
 
 
 class InvoiceType extends AbstractType 
 {
 private $ user; 
 
 public function __construct（SecurityContext $ security_context）
 {
 $ this-> user = $ security_context-> getToken（） - > getUser（）; 
 
 $ b $ public function buildForm（FormBuilderInterface $ builder，array $ options）
 {
 $ lastMonth = new \DateTime（）; $ lastMonth->修改（'-1个月'）; 
 $ builder 
  - > add（'month'，'choice'，array（
'data'=> $ lastMonth-> format（'F'），
'选择'=>数组（
January=>January，
February=>February，
March=> ，
April=>April，
May=>May，
June=>June =七月，
八月=>八月，
九月=>九月，
十月=> b $ bNovemeber=>Novemeber，
December=>December，
）
））
  - > add（'year' ，null，数组（
'data'=> $ lastMonth->格式（'Y'）
））
 - > add（'from_date'，'date'，array（
'label'=> 'From'，
'data'=>新的\DateTime（），
））
  - > add（'to_date'，'date'，array（
'label'=>'To'，
 //'data'=> new \DateTime（），
））
  - > add（'hours'）
  - > add（'expenses'）
'> add（'expense_amount'，'money'，
 array（
'required'=> false，
））
  - > add（'attachment' ，'file'，
 array（
'path'=> $ options ['data']  - > getAttachmentPath（），
'required'=> false，
）
）
; 
 if（$ this-> user-> hasRole（'ROLE_ADMIN'））{
 $ builder-> add（'vendor'）; 
 
 
 
 public function setDefaultOptions（OptionsResolverInterface $ resolver）
 {
 $ resolver-> setDefaults（array（
'data_class '=>'TechPeople \InvoiceBundle\Entity\Invoice'
））; 
} 
 
 public function getName（）
 {
 return'techpeople_invoicebundle_invoicetype'; 
 
 
 $ / code> 




解决方案

Set它在实体上，或任何对象，你将用作表单数据，在构造函数中或作为默认值！

  class Invoice { 
 
私人$月; 
私人$年; 
 private $ from_date; 
 private $ to_date; 
 // ... 
 
 public function __construct（）
 {
 $ lastMonth = new \DateTime（'now  -  1 month'）; 
 $ this-> month = $ lastMonth->格式（'F'）; 
 $ this->年= $ lastMonth->格式（'Y'）; 
 $ this-> from_date = new \DateTime; 
 $ this-> to_date = new \DateTime; 
 // ... 
} 
} 
  

为创建表单设置这两个字段，对于持久化实体，这些值将在加载时由存储的数据覆盖。

Okay, I've got the FormType described below. I use this Form class for both the create and edit forms. I decided to set a default date (from_date and to_date below), using the data attribute in the options array. This does a great job of setting the default date, in fact, too good a job. It also overrides the existing date in the edit form, which is no good at all, really.

How do I set a real 'default' value, as opposed to an 'always' value?

<?php

namespace TechPeople\InvoiceBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Symfony\Component\Security\Core\SecurityContext;


class InvoiceType extends AbstractType
{
    private $user;

    public function __construct(SecurityContext $security_context)
    {
        $this->user = $security_context->getToken()->getUser();
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $lastMonth = new \DateTime();$lastMonth->modify('-1 month');
        $builder
            ->add('month', 'choice', array(
                'data' => $lastMonth->format('F'),
                'choices' => array(
                    "January" => "January",
                    "February" => "February",
                    "March" => "March",
                    "April" => "April",
                    "May" => "May",
                    "June" => "June",
                    "July" => "July",
                    "August" => "August",
                    "September" => "September",
                    "October" => "October",
                    "Novemeber" => "Novemeber",
                    "December" => "December",
                )
            ))
            ->add('year', null, array(
                'data' => $lastMonth->format('Y')
            ))
            ->add('from_date', 'date', array(
                 'label' => 'From',
                 'data' => new \DateTime(),
            ))
            ->add('to_date', 'date', array(
                 'label' => 'To',
                 //'data' => new \DateTime(),
            ))
            ->add('hours')
            ->add('expenses')
            ->add('expense_amount', 'money',
                array(
                    'required' => false,
                ))
            ->add('attachment', 'file',
                array(
                    'path'=>$options['data']->getAttachmentPath(),
                    'required' => false,
                )
            )
        ;
        if($this->user->hasRole('ROLE_ADMIN')){
            $builder->add('vendor');
        }
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'TechPeople\InvoiceBundle\Entity\Invoice'
        ));
    }

    public function getName()
    {
        return 'techpeople_invoicebundle_invoicetype';
    }
}

解决方案

Set it on the entity, or any object you will use as form data, in the constructor or as default value !

class Invoice {

    private $month;
    private $year;
    private $from_date;
    private $to_date;
    //...

    public function __construct()
    {
        $lastMonth = new \DateTime('now - 1 month');
        $this->month = $lastMonth->format('F');
        $this->year = $lastMonth->format('Y');
        $this->from_date = new \DateTime;
        $this->to_date = new \DateTime;
        //...
    }
}

It will set up these 2 fields for a creation form, and in the case of a persisted entity, these values will be overriden by stored data at loading.

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