upload csv file and save data in data base in cakephp 3 - cakephp-3.0

Question

How can i upload csv file and save data in to my mysql database.
according to id.in cakephp 3
i am unable to do that. can any one help me.
my controller
public function import() {
if(isset($_POST["submit"])){
if($_FILES['file']['csv']){
$filename = explode('.', $_FILES['file']['csv']);
debug($filename);
if($filename[1]=='csv'){
$handle = fopen($_FILES['file']['csv'], "r");
while ($data = fgetcsv($handle)){
$item1 = $data[0];
// $item2 = $data[1];
// $item3 = $data[2];
// $item4 = $data[3];
$Applicants = $this->Applicants->patchEntity($Applicants, $item1);
$this->Applicants->save($Applicants);
}
fclose($handle);
}
}
}
$this->render(FALSE);
}
my view:
<div class="col-md-8">
<?= $this->Form->create('Applicants',['type' => 'file','url' => ['controller'=>'Applicants','action' => 'import'],'class'=>'form-inline','role'=>'form',]) ?>
<div class="form-group">
<label class="sr-only" for="csv"> CSV </label>
<?php echo $this->Form->input('csv', ['type'=>'file','class' => 'form-control', 'label' => false, 'placeholder' => 'csv upload',]); ?>
</div>
<button type="submit" class="btn btn-default"> Upload </button>
<?= $this->Form->end() ?>
</div>

Answer 1

Your question is a bit unclear what do you want to do in the controller do you want to update the existing records or save new data. If you want to update then only you need to use patchEntity.
The patchEntity should have a database entity fetched where in you can change or update the data as per your need, so in case if your first column contains the id of the Applications table then below code can work and in $data you can write whatever fields you want to update or add
So you can use the below code block instead
public function import() {
if(isset($_POST["submit"])){
if($_FILES['file']['csv']){
$filename = explode('.', $_FILES['file']['csv']);
debug($filename);
if($filename[1]=='csv'){
$handle = fopen($_FILES['file']['csv'], "r");
while ($data = fgetcsv($handle)){
$item1 = $data[0];
$data = array(
'fieldName' => $item1
);
// $item2 = $data[1];
// $item3 = $data[2];
// $item4 = $data[3];
$Applicant = $this->Applicants->newEntity($data);
$this->Applicants->save($Applicant);
}
fclose($handle);
}
}
}
$this->render(FALSE);
}
If you have more specific code/requirement then please share, so that I can help you out accordingly.

Answer 2

Here is my Solution to upload csv file and save database
public function import($id = NULL) {
$data = $this->request->data['csv'];
$file = $data['tmp_name'];
$handle = fopen($file, "r");
while (($row = fgetcsv($handle, 1000, ",")) !== FALSE) {
if($row[0] == 'id') {
continue;
}
$Applicants = $this->Applicants->get($row[0]);
$columns = [
'written_mark' => $row[1],
'written_comments' => $row[2],
'viva_mark' => $row[3],
'viva_comments' => $row[4]
];
$Applicant = $this->Applicants->patchEntity($Applicants, $columns);
$this->Applicants->save($Applicant);
}
fclose($handle);
$this->set('title','Upload Student CSV File Input Number and others');
return $this->redirect($this->referer());
}