Saving PHP variable to MySQL INT is always 0 - php

Question

I am having a problem passing a variable to be saved as INT in MySQL. The closest thing I could find to my issue is this question but I have already verified that I am not using single and double quotes. When I print_r($this->session->userdata('subdomain')) I see the correct subdomain id on my screen (in this case 10), but when I try passing this using $params it always save subdomain_id as 0 and I can not figure out why.
Here is Project_assignees_model:
function add_prefix_project_assignees($params)
{
$this->db->insert('prefix_project_assignees',$params);
return $this->db->insert_id();
}
Here is my Project controller (Specifically it is the $assignees array):
function edit($entry_id)
{
$this->load->library('form_validation');
$this->form_validation->set_rules('client_id','Client Id','required|integer');
$this->form_validation->set_rules('title','Project Title','required|max_length[255]');
$this->form_validation->set_rules('project_status','Project Status','required');
$this->form_validation->set_rules('project_details','Project Details','required');
$this->form_validation->set_rules('project_estimated_hours','Project Estimated Hours','required|max_length[255]');
$this->form_validation->set_rules('end','Project Deadline','required');
if($this->form_validation->run())
{
date_default_timezone_set("America/New_York");
$date = date("Y-m-d h:i:sa");
$params = array(
'subdomain_id' => $this->session->userdata('subdomain'),
'client_id' => $this->input->post('client_id'),
'title' => $this->input->post('title'),
'project_status' => $this->input->post('project_status'),
'project_details' => $this->input->post('project_details'),
'project_last_updated' => $date,
'project_estimated_hours' => $this->input->post('project_estimated_hours'),
'start' => $this->input->post('start'),
'end' => $this->input->post('end'),
'owner_id' => get_current_user_id(),
);
$prefix_projects_id = $this->Project_model->update_prefix_projects($entry_id,$params);
$assignees = array(
'subdomain_id' => $this->session->userdata('subdomain'),
'project_id' => $entry_id,
'user_id' => $this->input->post('assignee'),
);
$this->load->model('Project_assignee_model');
$insertAssignees = array();
for ($i = 0; $i < count($assignees['user_id']); $i++)
{
//Get user_id from ID
$userID = $assignees['user_id'][$i];
$insertAssignees[$i] = array('project_id' => $entry_id, 'user_id' => $assignees['user_id'][$i]); // $insert is ready for insert_batch
$prefix_assignees = $this->Project_assignee_model->add_prefix_project_assignees($insertAssignees[$i]);
}
//redirect('project/index');
}
else
{
$this->load->model('Client_model');
$data['prefix_clients'] = $this->Client_model->get_all_prefix_clients();
$data['prefix_projects'] = $this->Project_model->get_prefix_projects($entry_id);
$data['prefix_users'] = $this->aauth->list_users();
$this->load->model('Project_assignee_model');
$data['prefix_assignees'] = $this->Project_assignee_model->get_prefix_project_assignees($entry_id);
$this->load->view('project/edit',$data);
}
}
Why does print_r show the correct subdomain_id but when it is saved to database it saves as 0?
*******UPDATE*******
Just for reference, this works:
$assignees = array(
'subdomain_id' => 10,
'project_id' => $entry_id,
'user_id' => $this->input->post('assignee'),
);
But this does not (Even though printing the userdata for subdomain gives me 10):
$assignees = array(
'subdomain_id' => $this->session->userdata('subdomain'),
'project_id' => $entry_id,
'user_id' => $this->input->post('assignee'),
);

Answer 1

Sometimes I guess it just takes writing it out for others before I realize my problem. When I loop through each assignee to add them to the table I realized I was not passing the subdomain_id with it.
I had this:
$insertAssignees[$i] = array('project_id' => $entry_id, 'user_id' => $assignees['user_id'][$i]); // $insert is ready for insert_batch
Needed to be changed to have subdomain_id included
$insertAssignees[$i] = array('subdomain_id' => $this->session->userdata('subdomain'), 'project_id' => $entry_id, 'user_id' => $assignees['user_id'][$i]); // $insert is ready for insert_batch