database query according to file input empty or not in codeigniter - codeigniter-3

Question

So i am changing my project from core PHP to Codeigniter. I have a edit for in which their are 3 input type file. Now i want to run my query according to these inout file. like if input file 1 is empty than don't update value else update. I did it in core PHP like this:
The name of input type file are: image1, image2, image3
mysqli query in core PHP:
if(!empty($photo1))
{
$p1=str_replace("-","",time().$photo1);
move_uploaded_file($_FILES['photo1']['tmp_name'], $folder.$p1);
$query .=",`image1`='$p1'";
}
if(!empty($photo2))
{
$p2=str_replace("-","",time().$photo2);
move_uploaded_file($_FILES['photo2']['tmp_name'], $folder.$p2);
$query .=",`image2`='$p2'";
}
if(!empty($photo3))
{
$p3=str_replace("-","",time().$photo3);
move_uploaded_file($_FILES['photo3']['tmp_name'], $folder.$p3);
$query .=",`image3`='$p3'";
}
Now how to do this in codeigniter model:
controller
public function store_ad()
{
$id=$this->input->post('id');
$d_email=$this->session->userdata('dealer_email');
$p_type=$this->input->post('property_type');
$p_subtype=$this->input->post('property_subtype');
$p_for=$this->input->post('p_for');
$p_name=$this->input->post('p_name');
$p_price=$this->input->post('p_price');
$state=$this->input->post('state');
$city=$this->input->post('city');
$loc=$this->input->post('location');
$pincode=$this->input->post('pincode');
$about=$this->input->post('p_about');
$stat=$this->input->post('status');
$config['upload_path'] = './images/properties';
$config['allowed_types']='gif|png|jpeg|jpg';
$this->load->library('upload',$config);
if($this->upload->do_upload('image1'))
{
$data1=$this->upload->data();
$img1=$data1['raw_name'].$data1['file_ext'];
}
if($this->upload->do_upload('image2'))
{
$data2=$this->upload->data();
$img2=$data2['raw_name'].$data2['file_ext'];
}
if($this->upload->do_upload('image3'))
{
$data3=$this->upload->data();
$img3=$data3['raw_name'].$data3['file_ext'];
}
}
How to crearte model according to the non empty input file. I am storing the name of the file in database

Answer 1

Inside your method in the model class check if the files you want to upload is empty or not e.g
public function update($data_array, $img1, $img2, $img3){
if(!empty($img1)){
$data_array['img_column1'] = $img1;
}
if(!empty($img2)){
$data_array['img_column2'] = $img2;
}
if(!empty($img3)){
$data_array['img_column3'] = $img3;
}
return $this->db->insert('YOUR_TABLE_NAME', $data_array);
}
Hope this helps....