Codeigniter Sql Error - sql

Question

function get_result_professions($key_word)
{
$sql = "SELECT users.name FROM users
inner join users_has_professions on users_has_professions.users_id = users.id
inner join professions on users_has_professions.professions_id = professions.id
where professions.key_word = ? ";
return $this->db->get()->query($sql, $key_word);
}
When I execute this code I receive the following error:
A Database Error Occurred
Error Number: 1096
No tables used
SELECT *
Filename: /var/www/expertt/models/search_model.php
Line Number: 31
How can I solve this problem? Thanks in advance.

Answer 1

$this->db->get() must contain an table name. in your case you want to remove it sindse you have an custom query so your function wil look like this:
function get_result_professions($key_word)
{
$sql = "SELECT users.name FROM users
inner join users_has_professions on users_has_professions.users_id = users.id
inner join professions on users_has_professions.professions_id = professions.id
where professions.key_word = '$key_word' ";
return $this->db->query($sql);
}

Answer 2

The $this->db->get() method in CodeIgniter's Active record requires a table name parameter (see the Active Record Documentation for more info) when used to query a table, unless you have previously build up the query using one of the other provided methods.
Usually when building up joins like you are doing you would use the select/ join methods provided by Active Record, like so
$this->db->select('users.name')->from('users')
->join('users_has_professions', 'users_has_professions.users_id = users.id')
->join('professions', 'users_has_professions.professions_id = professions.id')
->where('professions.key_word', $key_word);
(untested as I don't have your database to run it against)
You can then use the $this->db->get() method to retrieve the results like so
$results = $this->db->get();
foreach($query->result() as $row) {
//code here
}