CodeIgniter update error? - codeigniter

Question

I'm having a problem on updating here is my view:
foreach($attributes as $dataIndex ){
$firstName = $dataIndex['first_name'];
$f = array(
'name' => 'update_fname',
'value' => $firstName
);
echo "<fieldset><label>First Name:</label></br>".form_input($f)."</br>";
echo form_open(base_url()."index.php/home/save_update");
echo "<label>".form_submit('save_updates','Save')."</label>";
here I already showed in text field the obtained specific attributes from my database but the thing that I want to do is to save the changed item in the text field and save it to the database with a specific id.
here is my controller along with the get attributes:
public function get_attributes($patientID){
if($patientID=== null){
return;
}
$data['attributes'] = $this>patient_manager>get_attributes($patientID);
$this->load->view("edit_patient_view", $data);
}
public function save_update(){
if($this->input->post("save_updates") === false){
return;
}else{
$update = array( 'first_name' => $this->input->post('update_fname', true));
$this->patient_manager->save_attributes_by_id($update);
}
} this is for saving
here is my model:
public function get_attributes($patientID){
$this->db->select('first_name, mid_name,
last_name, age, gender, b_day, marital_status, address, contact_num,
occupation, medical_record');
$this->db->from('patients');
$this->db->where('patient_id', $patientID);
return $this->db->get()->result_array();
}
public function save_attributes_by_id($patientID, $update){
$this->db->where('patient_id', $patientID)
->update('patients', $update, $patientID);
}
and I'm having this error:
A PHP Error was encountered
Severity: Notice
Message: Array to string conversion
Filename: database/DB_active_rec.php
Line Number: 427
A Database Error Occurred
Error Number: 1054
Unknown column 'Array' in 'where clause'
UPDATE patients SET first_name = 0 WHERE patient_id = Array
Filename: C:\xampp\htdocs\system\database\DB_driver.php
Line Number: 330
I think the the system can't get the patient_id from my database.
pls help me thatks in advance.

Answer 1

Try this one
Make array as
$f = array(
'update_fname' => $firstName);
in single updation array set like this, we can use batch updation also
go through this link
http://ellislab.com/codeigniter/user-guide/database/active_record.html#update