'SQLSTATE[HY000]: General error' for inserting data into database? - php

Question

So I am creating a login system that uses php classes to insert data into database. The following is the insert method for the database.
public function insert($table, $fields = array()){
if(count($fields)){
$keys = array_keys($fields);
$values = '';
$x = 1;
foreach($fields as $field){
$values .= '?';
if($x < count($fields)){
$values .= ', ';
}
$x++;
}
$sql = "INSERT INTO {$table} (".implode(', ', $keys).") VALUES ({$values})";
if(!$this->query($sql, $fields)->error()){
return true;
}
}
return false;
}
The next method is where i grab input fields to input into database.
public function create($fields = array()) {
if ($this->_db->insert('users', $fields)) {
throw new Exception('There was a problem with creating an account. Try again later.');
}
}
And this is how I am registering the user.
if ($validation->passed()) {
//register user
$user = new User();
try {
$salt = Hash::salt(32);
$address =
Input::get('street_address') . ':' .
Input::get('city') . ':' .
Input::get('state_province') . ':' .
Input::get('zip_code')
;
echo $address;
$user->create(array(
'first_name' => Input::get('first_name'),
'last_name' => Input::get('last_name'),
'email' => Input::get('email'),
'address' => $address,
'password' => Hash::make(Input::get('password'), $salt),
'salt' => $salt,
'date_joined' => date('Y-m-d H:i:s'),
'groups' => 1
));
Session::flash('home', 'You have been registered and can now log in!');
header('Location: index.php');
} catch(Exception $e) {
die($e->getMessage());
}
// Session::flash('success', 'You registered successfully!');
// header('Location: index.php');
} else {
//show errors
foreach($validation->errors() as $error) {
echo $error . "<br>";
}
}
I tried fixing the query and making sure there was no mistakes, but I can't seem to find anything wrong with it.