I cannot grab a $_POST value in controller using Yii 2.0 - php

Question

Using Yii 2.0 i'm trying to grab some $_POST values in my controller from my view but cannot do this. I will show you my code and talk you through it below.
Models/CaseSearch.php
<?php
namespace app\models;
use Yii;
use yii\base\Model;
use yii\data\ActiveDataProvider;
use app\models\Cases;
/**
* CaseSearch represents the model behind the search form about `app\models\Cases`.
*/
class CaseSearch extends Cases
{
public $category;
public $subcategory;
public $childcategory;
public $newcategory;
/**
* #inheritdoc
*/
public function rules()
{
return [
[['case_id', 'year'], 'integer'],
[['name', 'judgement_date', 'neutral_citation', 'all_ER', 'building_law_R', 'const_law_R', 'const_law_J', 'CILL', 'adj_LR'], 'safe'],
];
}
/**
* #inheritdoc
*/
public function scenarios()
{
// bypass scenarios() implementation in the parent class
return Model::scenarios();
}
/**
* Creates data provider instance with search query applied
*
* #param array $params
*
* #return ActiveDataProvider
*/
public function search($params)
{
$query = Cases::find();
$dataProvider = new ActiveDataProvider([
'query' => $query,
]);
$this->load($params);
if (!$this->validate()) {
// uncomment the following line if you do not want to any records when validation fails
// $query->where('0=1');
return $dataProvider;
}
$query->andFilterWhere([
'case_id' => $this->case_id,
'judgement_date' => $this->judgement_date,
'year' => $this->year,
]);
$query->andFilterWhere(['like', 'name', $this->name])
->andFilterWhere(['like', 'neutral_citation', $this->neutral_citation])
->andFilterWhere(['like', 'all_ER', $this->all_ER])
->andFilterWhere(['like', 'building_law_R', $this->building_law_R])
->andFilterWhere(['like', 'const_law_R', $this->const_law_R])
->andFilterWhere(['like', 'const_law_J', $this->const_law_J])
->andFilterWhere(['like', 'CILL', $this->CILL])
->andFilterWhere(['like', 'adj_LR', $this->adj_LR]);
return $dataProvider;
}
public function searchByCategory($category){
$query = Cases::find();
$dataProvider = new ActiveDataProvider([
'query' => $query,
]);
if (!$this->validate()) {
// uncomment the following line if you do not want to any records when validation fails
// $query->where('0=1');
return $dataProvider;
}
$query->andFilterWhere([
'category_id' => $category
]);
return $dataProvider;
}
}
Okay so now is my view:
<?php
$form = ActiveForm::begin();
echo $form->field($searchModel, 'category')
->dropDownList(
ArrayHelper::map($allCategory, 'id', 'name'),
[
'onchange'=>'getSubcategory()',
]
);
//To stop errors, if first category not chosen make subcategory and empty drop down.
$subcategory = array(
"empty" => ""
);
echo $form->field($searchModel, 'subcategory')
->dropDownList(
ArrayHelper::map($subcategory, 'id', 'name'),
[
'onchange'=>'getChildcategory()',
]
);
//To stop errors, if second category not chosen make childcategory and empty drop down.
$childcategory = array(
"empty" => ""
);
echo $form->field($searchModel, 'childcategory')
->dropDownList(
ArrayHelper::map($childcategory, 'id', 'name'),
[
//'onchange'=>'getChildCategory()',
'onchange'=>'submitNow()',
]
);
echo '<div class="form-group">';
echo Html::submitButton('Submit', ['class' => 'btn btn-primary']);
echo '</div>';
ActiveForm::end();
Ok, so when i click the submit button i want to capture the value in my controller so that i can use this to alter the results given in the gridview.
When i inspect the element on the drop down lists the names are weird so i am not sure if this is making a different. for example the name for subcategory is actually: CaseSearch[subcategory]
Now for my controller:
public function actionIndex()
{
//
// This is for the first render of index
//
$model = new Cases;
$searchModel = new CaseSearch();
$allCategory = Category::find()->all();
$dataProvider = $searchModel->search(Yii::$app->request->queryParams);
//
// This is for when i click the submit button on the view. I want it to submit and then grab the subcategory in variable $subtest. I make $subtest = 1 so that when i first render the page it doesn't throw an error and when submitted it should change to the post value
//
$subtest = 1;
if($searchModel->load(Yii::$app->request->post())){
$subtest = $_POST['subcategory'];
}
return $this->render('index', [
'searchModel' => $searchModel,
'dataProvider' => $dataProvider,
'allCategory' => $allCategory,
'model' => $model,
'subtest' => $subtest
]);
}
However when i try to print_r() the variable $subtest in my view i get the error:
Undefined index: CaseSearch[subcategory]
and its for the line:
$subtest = $_POST['CaseSearch[subcategory]'];
In my controller.
Can anyone please advise as i cannot figure out why?

Answer 1

I think your application design is improvable. Read the Yii guide.
However I think the solution to the question is:
$subtest = $_POST['CaseSearch']['subcategory];

Answer 2

Don't use $_GETand $_POST directly in your controller there are some abstraction layer which filter that input.
$get = $request->get();
// equivalent to: $get = $_GET;
$post = $request->post();
// equivalent to: $post = $_POST;
You should use that classes and methods to get your params.
http://www.yiiframework.com/doc-2.0/guide-runtime-requests.html