Mysqli failing to insert boolean in prepared statement - php

Question

I am trying to INSERT a new row into my db via php7.
Mysqli is throwing the error
Column 'newsletter' cannot be null
The newsletter column in the database is a tinyint(1)
Here is the code:
public function Add_User(array $data) {
if( !isset($data['name']) || !isset($data['email']) || !isset($data['newsletter']) )
$optin = ( $data['newsletter'] === 'on' ) ? 1 : 0;
$country_code = $this->Get_Country_Code();
if( !$q = $this->_db->prepare("INSERT INTO `users` (`name`,`email`,`country_code`,`newsletter`) VALUES (?,?,?,?)") ) { printf('error on prepare'); }
if( !$q->bind_param('sssi', $data['name'], $data['email'], $country_code, $optin)) { printf('error on bind'); }
if( !$q->execute() ) { printf('error on execute'); }
printf('Insert error %s', $this->_db->error);
if( $this->_db->affected_rows == 0 ) {
// There was a problem with the insert
printf('Insert error %s', $this->_db->error);
}
$q->close();
}
I also tried adding the boolean value as a string, but it still didn't work.
Thanks in advance.

Answer 1

Fixed!
The issue was that I was not providing all column values ( I want to update those later, as they are not available on the html form submit ).
I needed to assign a default value for those columns which will not be filled on the initial INSERT.
The error message however was not helpful.

Answer 2

Shouldn't you set $optin to true/false instead of 1/0?

Answer 3

if( !isset($data['name']) || !isset($data['email']) || !isset($data['newsletter']) )
$optin = ( $data['newsletter'] === 'on' ) ? 1 : 0;
Basically if the criteria for this if are not true so you don't "enter" your if your $optin variable will be null/undefined.
If you want to avoid that there are 2 ways.
1) change the accepted value in your newsletter field in the db to accept null
2)
$optin=0;
if( !isset($data['name']) || !isset($data['email']) || !isset($data['newsletter']) ){
if($data['newsletter'] === 'on' ){
$optin=1;
}
}
$country_code = $this->Get_Country_Code();
Define your variable with the "negative" value you want to be set if your criteria are not matched and change it inside your if.