Update a row, but insert if row doesn't exist in codeigniter

Question

I want to do an insert of row in a table, like this:

$this->db->update_batch($this->table_name, $update, \'image_id\');

if ($this->db->affected_r         


        

Answer 1

First Select all image_id from the table.

$data = $this->db->select(`image_id`)->get($this->table_name)->result_array();

List image_id into an array.

$image_ids=array();

foreach($data as $key => $value):

$image_ids[$key]=$value[`image_id`];

endforeach;

$update = array(
   array('image_id' => 1, 'name' => 'Party Gustav'),
   array('image_id' => 2, 'name' => 'Peter'),
   array('image_id' => 3, 'name' => 'Lisa')
)

Check if the image_ids exist:

$update_query= $this->db->where_in(`image_ids`,$image_ids)
               ->get($this->table_name)->result();

if($update_query->num_rows() > 0):

  $this->db->update_batch($update,$this->table_name);//update if ids exist
else
   $this->db->insert_batch($update,$this->table_name);//insert if does not exist
endif;

Answer 2

It's been a while since I've used codeigniter, but could you check to see if the row exist first, and then either update or insert?

Answer 3

I think what you're looking for is INSERT IGNORE INTO. Unfortunately, Codeigniter doesn't have an equivalent Active Record function. A discussion on the Codeigniter forums and this similar SO question suggest a method like this:

foreach ($update as $update_item) {
    $insert_query = $this->db->insert_string($this->table_name, $update_data['name']);
    $insert_query = str_replace('INSERT INTO','INSERT IGNORE INTO',$insert_query);
    $this->db->query($insert_query);  
}

Also note that the image_id must be UNIQUE.