Join 3 tables codeigniter php - php

Question

I have 3 tables guest_user_info,pg_company,user_profile.
In guest_user_info have 2 columns:
g_uid | company_id
In pg_company have 2 columns:
company_id | user_id
In user_profile have 2 columns:
id |user_email
Here i want to get user_email from user_profile.i have g_uid value (in guest_user_info table).i want company_id from guest_user_info and get the company_id and match with pg_company table,there i can get user_id.then match with that user_id with id in user_profile table.at last i need user_email from user_profile table

Answer 1

Well its a simple one, you just need to join using active query in CodeIgniter.
$this->db->select("UP.id", "UP.user_email");
$this->db->from("guest_user_info AS GU");
$this->db->join("pg_company AS PC", "PC.company_id=GU.company_id");
$this->db->join("user_profile AS UP", "UP.id=PC.user_id");
$this->db->where("GU.g_uid", $guid);
$query = $this->db->get();
return $query->result();
In above code, $guid you have to provide which you have.
Also please take a look at these links:
https://www.codeigniter.com/userguide3/database/query_builder.html
https://www.codeigniter.com/userguide2/database/active_record.html
You get so many things after reading this.

Answer 2

Check bellow code it`s working fine and common model function also
supported more then one join and also supported multiple where condition
order by ,limit.it`s EASY TO USE and REMOVE CODE REDUNDANCY.
================================================================
*Album.php
//put bellow code in your controller
=================================================================
$album_id='';//album id
//pass join table value in bellow format
$join_str[0]['table'] = 'pg_company';
$join_str[0]['join_table_id'] = 'pg_company.company_id';
$join_str[0]['from_table_id'] = 'guest_user_info.company_id';
$join_str[0]['join_type'] = '';//set join type
$join_str[1]['table'] = 'user_profile';
$join_str[1]['join_table_id'] = 'user_profile.id';
$join_str[1]['from_table_id'] = 'guest_user_info.user_id';
$join_str[1]['join_type'] = '';
$selected ="guest_user_info.*,user_profile.user_name,pg_company.name";
$condition_array=array('guest_user_info.g_uid' => $g_uid);
$albumData= $this->common->select_data_by_condition('guest_user_info', $condition _array, $selected, '', '', '', '', $join_str);
//call common model function
if (!empty($albumData)) {
print_r($albumData); // print album data
}
=========================================================================
Common.php
//put bellow code in your common model file
========================================================================
function select_data_by_condition($tablename, $condition_array = array(), $data = '*', $sortby = '', $orderby = '', $limit = '', $offset = '', $join_str = array()) {
$this->db->select($data);
//if join_str array is not empty then implement the join query
if (!empty($join_str)) {
foreach ($join_str as $join) {
if ($join['join_type'] == '') {
$this->db->join($join['table'], $join['join_table_id'] . '=' . $join['from_table_id']);
} else {
$this->db->join($join['table'], $join['join_table_id'] . '=' . $join['from_table_id'], $join['join_type']);
}
}
}
//condition array pass to where condition
$this->db->where($condition_array);
//Setting Limit for Paging
if ($limit != '' && $offset == 0) {
$this->db->limit($limit);
} else if ($limit != '' && $offset != 0) {
$this->db->limit($limit, $offset);
}
//order by query
if ($sortby != '' && $orderby != '') {
$this->db->order_by($sortby, $orderby);
}
$query = $this->db->get($tablename);
//if limit is empty then returns total count
if ($limit == '') {
$query->num_rows();
}
//if limit is not empty then return result array
return $query->result_array();
}