Generating JSON Query Result in Codeigniter - php

Question

So i have database table named usermeta and have table structure like this :
-----------------------------------------------------------
| ummeta_id | user_id | meta_key | meta_value |
-----------------------------------------------------------
| 1 | 1 | fullname | John Doe |
| 2 | 1 | birthplace | New York |
| 3 | 1 | birthdate | 1990/01/01 |
| 4 | 1 | mobile | 0812-3456-7890 |
| 5 | 1 | email | john.doe#mail.com |
| 6 | 2 | fullname | Jon Wick |
| 7 | 2 | birthplace | Washington DC |
| 8 | 2 | birthdate | 1985/10/21 |
| 9 | 2 | mobile | 0890-1234-5678 |
| 10 | 2 | email | wickjohn#mail.com |
And i try to generate json data for all data from this database using Codeigniter (v 3.1.9) using Controller and Model.
This is my Model (model name: db_usermeta)
function userslist()
{
$query = $this->db->select('*')
->from('usermeta')
->get();
return $query->result();
}
This is my Controller
public function userlist()
{
header('Content-Type: application/json; charset=utf-8');
$query = $this->db_usermeta->userslist();
$json_data = array();
foreach ($query as $key)
{
$json_data[$key->meta_key] = $key->meta_value;
}
echo json_encode($json_data);
}
The result when i open using my browser to check the json data using web developer tool is only show last record, in this case only show data from user_id 2, like this:
{
"fullname":"John Wick",
"birthplace":"Washinton DC",
"birthdate":"1985/10/21",
"mobile":"0890-1234-5678",
"email":"wickjohn#mail.com"
}
What I want to achieve is to show all json data nested like this:
"data": [
{
"fullname":"John Doe",
"birthplace":"New York",
"birthdate":"1990/01/01",
"mobile":"0812-3456-7890",
"email":"john.doe#mail.com"
},
{
"fullname":"John Wick",
"birthplace":"Washinton DC",
"birthdate":"1985/10/21",
"mobile":"0890-1234-5678",
"email":"wickjohn#mail.com"
}
]
How can i achieve this? Did I make a mistake on my controller and model. I really appreciate your help.

Answer 1

your $key->meta_key is overwriting for every record. that's why only last record appeared. You don't actually need to loop through to get json data.
public function userlist()
{
header('Content-Type: application/json; charset=utf-8');
$query = $this->db_usermeta->userslist();
$json_data = array(array());
$user_id_map = array();
$index = 0;
foreach ($query as $key)
{
if(!isset($user_id_map[$key->user_id])){
$user_id_map[$key->user_id] = $index++;
}
$currentIndex = $user_id_map[$key->user_id];
$json_data[$currentIndex][$key->meta_key] = $key->meta_value;
}
echo json_encode($json_data);
}
just change your controller code to this and this will return json data.

Answer 2

Since the meta key fullname is same for both records, you need to change the key name to something unique
foreach ($query as $key)
{
$json_data[$key->meta_key] = $key->meta_value;
}
Change $json_data[$key->meta_key] to $json_data[$key->meta_key.$key->user_id]
or simply change it to $json_data[$key->ummeta_id]