表单中的Symfony2动态实体类字段组

时间:2013-11-15 09:23:54

标签: php forms symfony

我正在尝试开发一个表单,让学生从多个小组中选择课程。它的定义如下:

  • 课程有名称/描述/小时。
  • 课程属于群组,其中包含小时的名称/说明/限制(例如,您必须从该群组中选择5个学分,或者您最多只能从该群组中学习10个小时)
  • 课程组被组织成一个程序产品,其中可能包含其他字段

所以我希望表单允许学生选择课程,但是这些课程是在这些小组中组织的,其中包含有关选择课程的说明。学分小时部分将通过自定义验证规则进行验证。

这是我正在考虑的代码的概念(省略了很多命名空间/ Doctrine映射等)。

实体有点像这样:

class Offering
{
    // has multiple CourseGroups
    private $groups;
}

class CourseGroup
{
    // which Offering it belongs to
    private $offering;
    private $name;
    private $maxHours;
}

class Course
{
    // which CourseGroup it belongs to
    private $group;
    private $name;
    private $hours;
}

// User submits an application with chosen courses from multiple groups
class Application
{
    // ...
    private $courses;
}

// Joins the Applications to Courses (N to N)
class ApplicationCourse
{
    // which Application
    private $application;
    // which Course
    private $course;
}

但我正在试图弄清楚如何把它放在一个表格中。我不介意只是将表单绑定到数组并稍后将其排序以将其放入Application

class ApplicationType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            // ...other fields
        ;

        // Add the groups of courses to choose
        $builder->addEventListener(
            FormEvents::PRE_SET_DATA,
            function(FormEvent $event) use ($offering) {
                $form = $event->getForm();

                // Here I would like to add 1 EntityType per Offering
                // The EntityType allows the user to select multiple Courses within that group
                $i = 0;
                foreach ($offering->groups as $group) {
                    // Maybe add the $group as a static block in the twig template here
                    // Ideally the form should show the group name/description

                    // I'll probably borrow from this class https://github.com/genemu/GenemuFormBundle/blob/master/Form/Core/Type/PlainType.php

                    // This adds a group of checkboxes to select a course from this group
                    $form->add('course_'.$i, 'entity', array(
                        'class' => 'Acme\DemoBundle\Entity\Course',
                        'property' => 'name',
                        'multiple' => true,
                        'expanded' => true,
                        'query_builder' => function(EntityRepository $er) use ($group) {
                            // imagine this ia a query that selects all courses in the $group
                            return $er->createGroupCoursesQueryBuilder($group);
                        },
                    );
                    $i++;
                }
            }
        );
    }

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

最后,我想要一个看起来像这样的表单:

科学:选择至少4学分

  • [x] SCI100(2小时)
  • [] SCI101(2小时)
  • [] SCI102(2小时)

数学:选择至少4学分

  • [] MTH100(4小时)
  • [x] MTH101(4小时)

{GROUP NAME}:{GROUP DESCRIPTION}

  • [{selected?}] {COURSE NAME} {COURSE HOURS}

这种方法有用吗?有没有更好的方法,以便我不必将该表单绑定到数组,然后在验证后重新组装它?

1 个答案:

答案 0 :(得分:2)

看到这个答案Symfony 2 Forms entity Field Type grouping

后,解决方案实际上很简单

我只是定制了表单的渲染。最好的部分是,我得到了Symfony表单的所有有用部分(数据绑定),但我可以完全自定义渲染。

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('courses', 'entity', array(
            'class' => 'MyMainBundle:Course',
            'property' => 'name',
            'multiple' => true,
            'expanded' => true
        ))
        ->add('save', 'submit')
    ;
}

树枝模板中有一个很酷的技巧就是自己渲染它。我确实必须通过课程组。

诀窍是使用{% do form.courses.setRendered %}

{{ form_start(form) }}
    {{ form_errors(form) }}

    {% for group in academics.courseGroups %}
    <section>
        <h2>
            {{ group.name }}
        </h2>
        <p>{{ group.description }}</p>

        {% for course in group.courses %}
        <div class="form-group">
            <div class="course">
                <div class="checkbox">
                    <label for="my_mainbundle_application_course_courses_{{ course.id }}">
                        <input type="checkbox"
                               id="my_mainbundle_application_course_courses_{{ course.id }}"
                               name="my_mainbundle_application_course[courses][]"
                               value="{{ course.id }}"
                               {% if course.id in form.courses.vars.value and form.courses.vars.value[course.id] %}checked="checked"{% endif %}>
                        <span class="name">{{ course.name }}</span>
                        <span class="subject">({{ course.subject }})</span>
                        -
                        <span class="credits">{{ course.credits }} hours</span>
                    </label>
                </div>
            </div>
        </div>
        {% endfor %}
    </section>
    {% endfor %}

    {% do form.courses.setRendered %}
    {{ form_row(form.save) }}

{{ form_end(form) }}