Codeigniter active record query count - sql

Question

in my project i have 4 tables. One called Calls, Projects, Products and Users.
Calls has 2 FK (project_id and user_id) and Projects has one FK (product_id).
I'm trying to query the table Calls and I want to know the amount of calls for each product has been received from each operator.
I'm trying to query something like this:
[{"name":"User1","Project1":"120","Project2":"10,"Project3":"140...}
{"name":"User2","Project1":"80","Project2":"60,"Project3":"14...}]

Answer 1

I am guessing when you mean operator you mean user
$this->db->select('count(P.product_id) as total_product ,CL.project_id, CL.user_id, P.project_name')
->from('Calls CL')
->join('Projects P', 'P.project_id=CL.project_id')
->group_by('CL.project_id, CL.user_id')
->get();
Now your can write a php script to loop through your result to make the json
$index = 0;
$user_data = array();
$user_key = array();
foreach ($result as $row) {
if(!isset($user_key[$row['user_id']])){
$user_key[$row['user_id']] = $index;
$index++;
}
$user_data[$user_key[$row['user_id']]]['user_name'] = $row['user_name'];
$user_data[$user_key[$row['user_id']]][$row['project_name']] = $row['total_product'];
}
I did not tested the code but it should work