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how will I append data I am selecting from a dropdown list to the next input field in yii2

I want to select courses from the course field, then let it show in my courses field and submit the courses to the database. or if someone can help me so my courses can appear has a checkbox and once i tick a checkbox, it appears in the courses field
<?php $form = ActiveForm::begin(); ?>
<?=$form->field($model, 'student_id') ?>
<?=
$form->field($model, 'faculty_id')->dropDownList(
ArrayHelper::map(Faculties::find()->asArray()->all(), 'faculty_id', 'faculty_name'), [
'prompt' => 'Select Faculty',
'onchange' => '$.post("' . Yii::$app->urlManager->createUrl('/departments/lists?id=') . '"+$(this).val(), function(data) {
$("select#registrations-department_id").html (data);
});'
]
);
?>
<?=
$form->field($model, 'department_id')->dropDownList(
ArrayHelper::map(Departments::find()->asArray()->all(), 'department_id', 'department_name'), [
'id' => 'registrations-department_id',
'prompt' => 'Select Department',
'onchange' => '$.post("' . Yii::$app->urlManager->createUrl('/courses/lists?id=') . '"+$(this).val(), function(data) {
$("select#registrations-course_id").html (data);
});'
]);
?>
<?=
$form->field($model, 'course_id')->dropDownList(
ArrayHelper::map(Courses::find()->asArray()->all(), 'course_id', 'course_name'), [
'id' => 'registrations-course_id',
'prompt' => 'Select Course',
'onchange' => '$.post("(selected:)."+$(this).val(), function(data){
$("#registrations-courses").append(data)
});'
]);
?>
<!-- <?//= $form->field($model, 'courses')->checkBoxList([]) ?> -->
<?=$form->field($model, 'courses') ?>
<?=$form->field($model, 'comment') ?>
<?=$form->field($model, 'status') ?>
<?=$form->field($model, 'created_at') ?>
<?=$form->field($model, 'updated_at') ?>
<div class="form-group">
<?=Html::submitButton('Submit', ['class' => 'btn btn-primary']) ?>
</div>
<?php ActiveForm::end(); ?>
EDIT
this is my controller how do I save the courses in the database in the same column?
public function actionCreate()
{
$model = new Registrations();
if ($model->load(Yii::$app->request->post())) {
if ($model->validate()) {
// form inputs are valid, do something here
$model->student_id = Yii::$app->user->identity->id;
$model->faculty_id = 1 ;
$model->department_id = null ;
$model->course_id = 1;
$model->save();
return $this->redirect('../site/profile');
}
}
return $this->render('create', [
'model' => $model,
]);
}

You can use the checkBoxList() to create the list of checkboxes based on the courses list.
Change your course_id field to the following
$form->field($model, 'course_id')->checkboxList(yii\helpers\ArrayHelper::map(Courses::find()->asArray()->all(), 'course_id', 'course_name'), [
'inline' => true,
'unselect'=>null,
'item' => function($index, $label, $name, $checked, $value){
$checked = $checked ? 'checked' : '';
return "<input type='checkbox' class='my-courses' name='{$name}' value='{$value}' {$checked} data-label='{$label}'> <label>{$label}</label>";
}]);
add an id attribute to your courses field like below
$form->field($model, 'courses', ['inputOptions' => ['id' => 'courses']]);
and then add this javascript code to the top of your page
$js = <<< JS
$(".my-courses").on('click',function(e){
let course_name=$(this).data('label');
let course_field=$("#courses");
if($(this).is(":checked")){
$("#courses").val()==''?course_field.val(course_name):course_field.val(course_field.val()+', '+ course_name);
}else{
let regex=new RegExp(',{0,1}\\\s{0,1}('+course_name+')','g');
course_field.val(course_field.val().replace(regex,''));
}
})
JS;
$this->registerJs($js, \yii\web\View::POS_READY);
Now if you select the checkbox the name of the course would be copied to the input field and when you submit your form you can get the fields in your $_POST array under your specific model index like below.
[course_id] => Array
(
[0] => 1
[1] => 2
)
[courses] => asdas, shugal, spoon
You can verify by adding a print_r(Yii::$app->request->post()) in your controller action inside the check
if($model->load(Yii::$app->request->post())){
print_r(Yii::$app->request->post());
You can iterate on the course_id to save all of the course_id that were selected as checkboxes.

In yii2 how to change Dropdown data as per role from?

I have data in Drop down list as per role(for every role table are different).
I don't have any idea how to do because I am not familiar with yii2 First select a role and after selecting role I want data from different different table as per role
<?= $form->field($model, 'role')->dropDownList( [ 'A' => 'Admin', 'M' => 'Member', 'P' => 'Practice', ],['prompt'=>'--Select a Role--',]);?>
<?= $form->field($model, 'code')->dropDownList(
ArrayHelper::map(Member::find()->all(), 'id', 'memberCode'),
['id'=>'memberCode']
);
?>

You Need to update your 2nd dropdown when you select any value from dropdown 1st. Lets say 2nd drop down have id #dropdown2 so, i dit in yii you can change it according to yii2.
echo $form->dropDownListGroup(
$model, 'id', array(
'wrapperHtmlOptions' => array(),
'widgetOptions' => array(
'data' => CSystemGenerated::getProjectName($model->c_id),
'htmlOptions' => array(
'prompt' => 'Select Project',
'ajax' => array(
'type' => 'POST',
'url' => your url,
'update' => '#dropdown2',
//'dataType' => 'json',
'data'=>array('id'=>'js:this.value'),
)
),
),
)
);
<?php
echo $form->dropDownListGroup(
$model, 'tag', array(
'wrapperHtmlOptions' => array(),
'widgetOptions' => array(
'data' =>$this->getTags(),
'htmlOptions' => array(
'prompt' => 'Select Tags',
),
)
)
);
?>
check this link it will help you more.
Link1
link2

Please Refer to Kartik Dependent Drop Down in Yii2 ..This will surely helpfull

Yii2: Get values to update form in modal window

I am using Yii2 modal to update a form in modal window but I am unable to fetch the values to be already filled in the form.
In this screen-shot link below:
http://awesomescreenshot.com/0f957qq367
When I click on edit option, It takes me to the update form which is opened in a modal window. But this form shows empty values in all fields. I want to update the form.
Please find this in this screen-shot below:
http://awesomescreenshot.com/0f257qqscb
This is the snippet for what I have tried yet:
<?php
use yii\bootstrap\Nav;
use yii\bootstrap\Modal;
Modal::begin([
'id'=>'modalEdit',
//'header' => '<h2>Hello world</h2>',
'size'=> 'modal-lg',
//'toggleButton' => ['label' => 'click me'],
]);
$newmodel = new Backlog();
// $newmodel->id;
echo $this->render('/backlog/update', ['model' => $newmodel]);
Modal::end();
echo Nav::widget([
'options' => ['class' => 'nav-pills navbar-right'],
'encodeLabels' => false,
'items' => [
['label' => '', 'items' => [
['label' => '<span data-toggle="modal" data-target="#modalEdit" style="cursor: pointer;">Edit</span>','url' => 'javascript:void(0);'],
'<li class="divider"></li>',
['label' => '<span>Assign</span>', 'url' => ['#']],
'<li class="divider"></li>',
['label' => '<span>Convert To Backlog</span>', 'url' => ['#']],
'<li class="divider"></li>',
['label' => '<span>Close</span>', 'url' => ['#']],
]],
],
]);

if Backlog is an ActiveRecord Replace the Line with this.
$newmodel = Backlog::findOne(['ID'=>$id]);

Finally, I solved the problem using javascript and ajax loading :
$(document).on("click",".edit-backlog",function(e){
var back_l_id=$(this).attr("b-id");
var modal_body=$("#modalEdit").find(".modal-body");
$.ajax({
url:getAjaxUrl('backlog','update'),
data:{'id':back_l_id},
success:function(res){
//console.log(res);
modal_body.html(res);
}
});
});
I added a class .edit-backlog to span and get the id ("b-id") and used in the above script. Hope this answer helps others too.

CakePHP- Using the JsHelper for Ajax Search

Ok, So I am trying to implement sort of a livesearch using the cake's Js Helper. The user will select a criteria to search by, using a drop down, and then tyoe in his search in an input text field. So far, this is what I have.
echo $this->Form->create(false,array('type'=>'post','default'=>false));
echo $this->Form->input('criteria',array(
'label'=>'Search Criteria',
'options' => array(
'id'=> 'By ID',
'name' => 'By Name',
'blood' => 'By Blood Type',
'type' => 'By Donor Type',
'age' => 'By Age',
'gender' => 'By Gender'
)
));
?>
Here is the input:
<?php echo $this->Form->input('query', array('type' => 'text', 'id' => 'query', 'name' => 'query', 'label' => false, 'placeholder' => 'Search')); ?>
<div id="loading" style="display: none; ">
<?php echo $this->Html->image('ajax_clock.gif');?>
</div>
And this is my Js code generated using the helper!
<script type="text/javascript">
<?php
echo $this->Js->get('#query')->event('keyup',$this->Js->request(
array('controller' => 'donors', 'action' => 'search'),
array('update'=>'#results','async' => true,'dataExpression' => true,'method' => 'post','data'=>'$(\'#query,#criteria\').serializeArray()')
),false);
?>
</script>
The above Js should grab the values of the criteria drop down aswell as the value inside the input field , on the keyup event. That said, I thought it was better to encode the data, and found the serializeArray method in the doc, which should do just that (I think..)
Now, my problem is I do not know how to retrieve that serialized data from the action receiving the request. So far I have this
function search() {
if($this->request->is('post')){
$data = $this->request->input('json_decode');
}
}
So basically, I want to know how to access the data from the search action, as well as, I tried to echo the $data variable, and die($data), but I do not know where the debugging info is displayed. Any help regarding both my questions would be MUCH appreciated! thanks!

three selects each based on previous jquery

I'm trying to do 3 selects in cakePhp + jQuery first one with provinces, second - localities, third - schools in that place. Here is my cake code (so far):
echo $this->Form->input('proviences', array(
'type' => 'select',
'empty' => true,
'options' => $proviences,
'label' => 'Province',
'class' => 'proviences',
'before' => '<div style="float:left;width:180px"',
'after' => "</div>"
));
echo $this->Form->input('localities', array(
'type' => 'select',
'empty' => true,
'options' => $localities,
'label' => 'City',
'class' => 'localities',
'before' => '<div style="float:left;width:180px"',
'after' => "</div>"
));
$schoolList = array();
foreach($schools as $value) {
$schoolsList[]=$value['name'];
}
echo $this->Form->input('school_id', array(
'label' => 'Szkoła',
'options' => $schoolsList,
'empty' => true,
'before' => '<div style="float:left;width:240px"',
'after' => "</div>",
'onchange' => "submit();",
));
In $schools i have a list looking this way
array(
id1 => array(
'name' => 'some_name',
'province' => 'some_province',
'locality' => 'some_city'
)
)
and using this to get lists of provinces,localities and school names
I was trying to use this but couldn't get it working ;/
Filter three select boxes based on previous selections
Is there a way of doing it in jQuery without ajax?

you can do it without using ajax, but for that you would need the schools array on client side, and create/edit options based on that on the client side, too.
here is a working fiddle. (hastily thrown together, but you get the idea). You need to get the schools array into js, though. you could either use AJAX for that or, pass it as json on the page:
echo 'var schools = JSON.parse('.json_encode($schools).');
You have to think about where to place that, too, so that the variable doesn't leak into the global scope. you could put it in the jQuery closure, for example:
echo '(function($){';
echo 'var schools = JSON.parse('.json_encode($schools).');
// now the javascript from the fiddle...
echo '}(jQuery))';