forms - 如何在 Symfony 项目中以嵌入形式从 Twig 访问底层对象

Question

在使用 Symfony 2.7.7 开发的医疗记录项目中，我必须跟踪补充医疗检查的结果。根据所进行的考试类型，这些结果可以有多种类型。特别是，要考虑的参数如下:

• 正常/改变；
• 正/负；
• 值(value)。

出于这个原因，我以这种方式做了一个实体SupplementaryMedicalExamination:

class SupplementaryMedicalExamination extends MedicalExamination
{
    /**
     * @var string $examination
     *
     * @ORM\Column(type="string", length=255, nullable=false)
     *
     */
    private $examination;

    /**
     * @var bool $hasNormalOrAlteredEvaluation;
     *
     * @ORM\Column(name="has_normal_or_altered_evaluation", type="boolean", nullable=false)
     *
     */
    private $hasNormalOrAlteredEvaluation;

    /**
     * @var bool $hasNegativeOrPositiveEvaluation
     *
     * @ORM\Column(name="has_negative_or_positive_evaluation", type="boolean", nullable=false)
     *
     */
    private $hasNegativeOrPositiveEvaluation;

    /**
     * @var bool $hasValue
     *
     * @ORM\Column(name="has_value", type="boolean", nullable=false)
     *
     */
    private $hasValue;
}

MedicalRecord 实体与补充检查具有一对多关系。

/**
 * AppBundle\Entity\HealthData\MedicalRecord
 *
 * @ORM\Table(name="medical_record")
 * @ORM\Entity(repositoryClass="MedicalRecordRepository")
 * @ORM\HasLifecycleCallbacks
 */
class MedicalRecord
{
    //other stuff

    /**
     * @var ArrayCollection $supplementaryExaminations
     *
     * @ORM\OneToMany(targetEntity="\AppBundle\Entity\HealthData\MedicalRecordSupplementaryExamination", mappedBy = "medicalRecord")
     */
    protected $supplementaryExaminations;

    //other stuff
}

MedicalRecordSuplementaryExamination 应包含每次补充检查的结果。

/**
 * AppBundle\Entity\HealthData\MedicalRecordSupplementaryExamination
 *
 * @ORM\Table(name="medical_record_supplementary_examination")
 * @ORM\Entity()
 * @ORM\HasLifecycleCallbacks
 *
 */
class MedicalRecordSupplementaryExamination
{
    /**
     * @var int $id
     *
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     *
     */
    private $id;

    /**
     * @var bool $isAltered
     *
     * @ORM\Column(name="is_altered", type="boolean")
     */
    protected $isAltered;

    /**
     * @var bool $isPositive
     *
     * @ORM\Column(name="is_positive", type="boolean")
     */
    protected $isPositive;

    /**
     * @var string $alterations
     *
     * @ORM\Column(type="string", length=255)
     */
    protected $alterations;

    /**
     * @var float $value
     *
     * @ORM\Column(type = "decimal", precision = 10, scale = 2)
     */
    protected $value;

    /**
     * @var MedicalRecord $medicalRecord
     *
     * @ORM\ManyToOne(targetEntity="medicalRecord", inversedBy = "supplementaryExaminations")
     * @ORM\JoinColumn(name="medical_record_id", referencedColumnName="id")
     */
    protected $medicalRecord;

    /**
     * @var SupplementaryMedicalExamination $supplementaryExamination
     *
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\HealthData\Core\SupplementaryMedicalExamination")
     * @ORM\JoinColumn(name="supplementary_examination_id", referencedColumnName="id")
     */
    protected $supplementaryExamination;
}

在 MedicalRecordType 中，我将 MedicalRecordExamination 作为集合包含在内，并在 MedicalRecordController 中根据可用的 SupplementaryExamination 在 MedicalRecord 对象中添加许多 MedicalRecordSupplementaryExamination 实例。

问题是我想根据 MedicalSupplementaryExamination 的结果类型在模板中显示正确的表单字段。

我想做这样的事情，但我不知道如何做，因为在这个级别我正在使用 FormView 实例，并且无法访问底层对象:

{% for supplementaryExamination in form.supplementaryExaminations %}
    {% if supplementaryExamination.hasNormalOrAlteredEvaluation == true %}
        {{ form_row(supplementaryExamination.isAltered) }}
    {% endif %}
{% endfor %}

我看过这篇文章:How to access an underlying object from a Twig's FormView in a template?但我不明白如何将此解决方案应用于我的案例。

谢谢

Answer 1

引用from the doc关于如何在 twig 模板中渲染表单:

You can access the current data of your form via form.vars.value:

因此，对于您的情况，您可以尝试以下操作:

{% if supplementaryExamination.vars.value.supplementaryExamination.hasNormalOrAltered‌​Evaluation == true %}

而不是这个:

{% if supplementaryExamination.hasNormalOrAlteredEvaluation == true %}

希望这有帮助