insert if not exists Codeigniter - mysql

Question

my controller:
function getFeed()
{
$feed_url = $this->input->get("url");
$content = file_get_contents($feed_url);
$x = new SimpleXmlElement($content);
foreach($x->channel->item as $entry) {
$feeds[] = array(
'title' => (string)$entry->title,
'url'=> (string)$entry->link,
'username' => $this->session->userdata('username')
);
$this->load->model('membership_model');
$this->membership_model->feeds($feeds);
}
Model:
function feeds($feeds_data)
{
$this->db->insert_batch('feeds', $feeds_data);
}
Is there a function to insert if only the row doesn't exists in the table? I have a table with 4 column : id,title,url,username. I have an anchor when i click him it calls geFeed function and insert the info into table. But i want to insert only if not exists.

Answer 1

I had the same challenge, so i eventually come up with a function which might be helpful to you.
function safe_update_batch($table_name,$records,$filter_field)
{
$filters=array();
foreach($records as $record)$filters[]=$record[$filter_field];
$this->db->query("SET SESSION group_concat_max_len=10000000");
$query=$this->db->select("GROUP_CONCAT($filter_field) AS existing_keys",FALSE)->where_in($filter_field, $filters)->get($table_name);
$row=$query->row();
$found_fields=explode(',',$row->existing_keys);
$insert_batch=array();
$update_batch=array();
foreach($records as $record)
{
if(in_array($record[$filter_field],$found_fields))$update_batch[]=$record;
else $insert_batch[]=$record;
}
if(!empty($insert_batch))$this->db->insert_batch($table_name,$insert_batch);
if(!empty($update_batch))$this->db->update_batch($table_name,$update_batch,$filter_field);
}
//sample usage
$this->safe_update_batch('feeds', $feeds_data,'title');

Answer 2

You can try this in your model!!
function insertClient($array)
{
$this->db->from('MyTable');
$this->db->where('Id', $array['Id']);
$query = $this->db->get();
if($query->num_rows() != 0){
$data = array(
'name'=>$array['name'],
'phone'=>$array['phone'],
'email'=>$array['email']
);
$this->db->where('Id', $array['Id']);
$this->db->update('CLIENTS', $data);
}else{
$data = array(
'name'=>$array['name'],
'phone'=>$array['phone'],
'email'=>$array['email']
);
$this->db->insert('CLIENTS',$data);
}
}
In controller:
$this->site_model->insertClient($_POST);

Answer 3

Sadly if you are using the active record class an INSERT IF NOT EXISTS function doesn't exist. You could try
Extending the active record class (easier said than done)
You could set indexes on certain columns as UNIQUE so that MySQL will check to see if it already exists
You could do some kind of SELECT before your INSERT to determine if the record is already there
For the queries where you need to do INSERT IF NOT EXISTS do $this->db->query('INSERT IF NOT EXISTS...')

Answer 4

function getFeed()
{
// Load the model up here - otherwise you are loading it multiple times
$this->load->model('membership_model');
$feed_url = $this->input->get("url");
$content = file_get_contents($feed_url);
$x = new SimpleXmlElement($content);
foreach($x->channel->item as $entry) {
// check if the feed is unique, if true then add to array
if( $this->membership_model->singleFeedIsUnique($entry) == TRUE ){
$feeds[] = array(
'title' => (string)$entry->title,
'url'=> (string)$entry->link,
'username' => $this->session->userdata('username')); }
} //foreach
// check to make sure we got any feeds with isset()
// if yes, then add them
if (isset($feeds)){ $this->membership_model->feeds($feeds); }
}

Answer 5

You can try this in your model and leave you controller without changes
function feeds($feeds_data)
{
$data = array(
title => $feeds_data[0],
url => $feeds_data[1],
username => $feeds_data[2]
);
$this->db->select('*');
$this->db->from('mytable');
$this->db->where('title',$feeds_data[0]);//you can use another field
if ($this->db->count_all_results() == 0) {
$query = $this->db->insert('mytable', $data);//insert data
} else {
$query = $this->db->update('mytable', $data, array('title'=>$feeds_data[0]));//update with the condition where title exist
}
}
you can check the id if you have it, adding in the data array and use it to check if exist