[英]Symfony2 Dynamic Groups of EntityType fields in form
我正在尝试开发一种表格,让学生从几个小组中选择课程。 定义如下:
因此,我希望该表格允许学生选择课程,但是这些课程是按这些组进行组织的,其中包含有关选择多少的说明。 学分时数部分将使用自定义验证规则进行验证。
这是我正在考虑的代码的想法(省略了很多名称空间/ 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;
}
但是我试图弄清楚如何将其放入表格中。 我不介意将表单绑定到数组,然后将其排序以放入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格:
科学:选择至少4个学时
数学:选择至少4个学时
{组名称}:{组说明}
等等。
这种方法行得通吗? 有没有更好的方法,这样我就不必将该表格绑定到数组上,而是在验证后重新组装它?
看到此答案后,解决方案实际上很简单Symfony 2 Forms实体Field Type分组
我只是定制了表单的呈现。 最好的部分是,我获得了Symfony表单的所有有用部分(数据绑定),但是我可以完全自定义呈现。
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可以自己渲染。 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) }}
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