选择依赖于另一个字段的 Select2 字段

Question

我想在本教程中实现代码显示：

https://backpackforlaravel.com/docs/4.1/crud-how-to#add-a-select2-field-that-depends-on-another-field

但是，此行返回null值：

$form = collect($request->input('form'))->pluck('value', 'name');

我不知道我是否应该在这里使用input('form')因为它取自 3.4 版的文档 有人知道它是否适用于版本 4 吗？

克鲁德控制器：

// CRUD::field('sub_district_id')
//     ->type('select2')
//     ->label('Kecamatan')
//     ->entity('sub_district')
//     ->attribute('sub_district_name')
//     ->model('AppModelsSubDistrict')
//     ->wrapper(['class' => 'form-group col-md-6']);
CRUD::field('sub_district_id')
->type('relationship')
->label('Kecamatan')
->attribute('sub_district_name')
->include_all_form_fields(true)
->wrapper(['class' => 'form-group col-md-6']);
CRUD::field('village_id')
->type('select2_from_ajax')
->label('Desa/Kelurahan')
->entity('village')
->attribute('village_name')
->model("AppModelsVillage")
->wrapper(['class' => 'form-group col-md-6'])
->data_source(url('api/village'))
->placeholder('Pilih Desa/Kelurahan')
->minimum_input_length(0)
->dependencies(['sub_district_id'])
->method('GET'); // optional - HTTP method to use for the AJAX call (GET, POST)

接口控制器：

$search_term = $request->input('q');
$form = collect($request->input('form'))->pluck('value', 'name');
// dump($form);
$options = Village::query();
if (!$form['sub_district_id']) {
return [];
}
// if a category has been selected, only show articles in that category
if ($form['sub_district_id']) {
$options = $options->where('sub_district_id', $form['sub_district_id']);
}
if ($search_term) {
$results = $options->where('village_name', 'LIKE', '%' . $search_term . '%')->paginate(10);
} else {
$results = $options->paginate(10);
}
return $options->paginate(10);

Answer 1

只需将此行添加到village的字段中

->include_all_form_fields(true)

它将返回表单中的所有值

克鲁德控制器：

// ...
CRUD::field('village_id')
->type('select2_from_ajax')
->label('Desa/Kelurahan')
->entity('village')
->attribute('village_name')
->model("AppModelsVillage")
->wrapper(['class' => 'form-group col-md-6'])
->data_source(url('api/village'))
->placeholder('Pilih Desa/Kelurahan')
->minimum_input_length(0)
->dependencies(['sub_district_id'])
->include_all_form_fields(true)
->method('GET'); // optional - HTTP method to use for the AJAX call (GET, POST)
// ...

Answer 2

试试这个

$form = collect($request->all())->get('value', 'name');