Can't insert data via rest api - php

Question

I try using rest api in codeigniter to insert data.
I try this
public function sensor_post(){
$data = array(
'sensor_id' => $this->input->post('sensor_id'),
'value' => $this->input->post('value'));
$insert = $this->db->insert('measurement', $data);
if ($insert) {
$this->response($data, 200);
} else {
$this->response(array('status' => 'fail', 502));
}
}
And call
http://localhost/rest_iot/index.php/iot/sensor?sensor_id=1&value=37
I try this in post man and I get error like this. I think I've fill the value, why this is happend?
<h1>A Database Error Occurred</h1>
<p>Error Number: 1048</p>
<p>Column 'sensor_id' cannot be null</p>
<p>INSERT INTO `measurement` (`sensor_id`, `value`) VALUES (NULL, NULL)</p>
<p>Filename: C:/xampp/htdocs/rest_iot/system/database/DB_driver.php</p>
<p>Line Number: 691</p>

Answer 1

If you are sending the data within the URL, you are sending it via GET. However your code is trying to receive data sent via POST.
I presume in codeigniter you can simply write the code as follows to receive it as GET:
'sensor_id' => $this->input->get('sensor_id'),
'value' => $this->input->get('value')

Answer 2

Either you are sending data via GET or POST ? Assuming that $this->post('sensor_id') you are looking for POST but sending via GET sensor_id=1&value=37.
Send data via POST method or... retrieve via GET

Answer 3

You are missing input in your post fields.
public function sensor_post()
{
$data = array(
'sensor_id' => $this->input->post('sensor_id'),
'value' => $this->input->post('value')
);
$insert = $this->db->insert('measurement', $data);
if ($insert) {
$this->response($data, 200);
} else {
$this->response(array('status' => 'fail', 502));
}
}
This will work for you.