WordPress users in Datatables with shorting , searching and paginate - php

Question

I am making a plugin to display all user info in a DataTables but i am failed to implement Search, filter and Pagination . I have about 20k users. Please help me.
may be I need to change my query to join wp_users and wp_usermeta and get the result for my case. I have fount a question here and a similar tutorial here . I am not good in writing MySQL query. Please help me with this.
I get ajax response like
{
"draw": 1,
"recordsTotal": 1,
"recordsFiltered": 1,
"data": [
[
"example#mail.com",
"Some Name",
"",
"admin",
""
]
]
}
This is my table structure
<table id="user_table" class="display table table-striped table-bordered dataTable" style="width:100%">
<thead class="user-table">
<tr>
<th>Email</th>
<th>Name </th>
<th>Url</th>
<th>nickname</th>
<th>description</th>
</tr>
</thead>
<tbody>
</tbody>
</table>
My script
jQuery(document).ready(function($){
$(window).on('load', function () {
setTimeout(loadtable, 200);
});
function loadtable(){
var ajaxurl = USERAjax.wpajaxusersearch;
var dataTable = $('#user_table').DataTable({
"processing":true,
"serverSide": true,
"order":[],
"pageLength": 10,
"ajax":{
url: ajaxurl,
type:"POST"
},
});
}
});
also added localize script like
function users_assets_scripts(){
wp_register_script( 'jquery_datatables_js', plugins_url( 'asset/js/datatables.min.js' , __FILE__ ), array(),null,true );
wp_enqueue_script( 'jquery_datatables_js' );
wp_register_style( 'jquery_datatables_css', plugins_url( 'asset/css/datatables.min.css' , __FILE__ ));
wp_enqueue_style( 'jquery_datatables_css' );
wp_localize_script( 'jquery', 'USERAjax', array('wpajaxusersearch' => admin_url( 'admin-ajax.php?action=wpajaxusersearch' )) );
}
add_action('wp_enqueue_scripts', 'users_assets_scripts');
and my data fetching function with ajax response
<?php
function wpajaxusersearch(){
$request=$_REQUEST;
global $wpdb;
$sort= "user_registered";
//Build the custom database query to fetch all user IDs
$all_users_id = $wpdb->get_results("SELECT $wpdb->users.ID FROM $wpdb->users ORDER BY $sort ASC LIMIT ".$request['start'].",".$request['length']." " );
$totalData=$wpdb->num_rows;
$data=array();
foreach ( $all_users_id as $i_users_id ) {
$user = get_userdata( $i_users_id->ID);
$email =$user->user_email;
$user_fullname =$user->first_name . ' ' . $user->last_name;
$user_url =$user->user_url;
$user_nickname =$user->nickname;
$user_profile =$user->description;
$sub_array = array();
$sub_array[] = $email;
$sub_array[] = $user_fullname;
$sub_array[] = $user_url;
$sub_array[] = $user_nickname;
$sub_array[] = $user_profile;
$data[] = $sub_array;
}
$json_data=array(
"draw" => (isset($request["draw"]) ? $request["draw"] : 0),
"recordsTotal" => intval($totalData),
"recordsFiltered" => intval($totalData),
"data" => $data
);
echo json_encode($json_data);
wp_die(); //to remove that 0 response
}
add_action( 'wp_ajax_wpajaxusersearch', 'wpajaxusersearch' );
add_action( 'wp_ajax_nopriv_wpajaxusersearch', 'wpajaxusersearch' );

Answer 1

Add these to your theme's 'functions.php' and everything should be fine.
// change user query to treat meta result as OR part
add_action( 'pre_user_query', 'user_meta_OR_search');
function user_meta_OR_search($q){
if ($search = $q->get('_meta_or_search')){
add_filter( 'get_meta_sql', function( $sql ) use ( $search ){
global $wpdb;
// run once
static $nr = 0;
if( 0 != $nr++ ) return $sql;
// modify WHERE
$where = sprintf(
" AND ( %s OR %s OR %s ) ",
$wpdb->prepare( "{$wpdb->users}.user_email like '%%%s%%'", $search),
$wpdb->prepare( "{$wpdb->users}.user_url like '%%%s%%'", $search),
mb_substr( $sql['where'], 5, mb_strlen( $sql['where'] ) )
);
$sql['where'] = $where;
return $sql;
});
}
}
function wpajaxusersearch()
{
$request = $_REQUEST;
$columns = array('user_email','first_name','user_url','nickname','description');
$search = esc_attr( trim( $request['search']['value'] ) );
$args = array();
$limit_args = array( 'number' => $request['length'], 'offset' => $request['start'] );
$order_args = array();
$search_args = array();
if ( isset($request['order']) && count($request['order']) )
{
$sort_column = $request['order'][0]['column'];
$sort_column_name = $columns[$sort_column];
$sort_dir = $request['order'][0]['dir'];
if( stristr( $sort_column_name,'user_' ))
$order_args = array( 'orderby' => $sort_column_name, 'order' => $sort_dir );
else
$order_args = array( 'meta_key' => $sort_column_name, 'orderby' => 'meta_value', 'order' => $sort_dir );
}
else
$order_args = array( 'orderby' => 'user_registered', 'order' => 'ASC' );
$args = $order_args;
if(isset($search) && $search != "")
{
$search_args = array(
'_meta_or_search' => "*{$search}*",
'meta_query' => array(
'relation' => 'OR',
array(
'key' => 'first_name',
'value' => $search,
'compare' => 'LIKE'
),
array(
'key' => 'last_name',
'value' => $search,
'compare' => 'LIKE'
),
array(
'key' => 'nickname',
'value' => $search,
'compare' => 'LIKE'
),
array(
'key' => 'description',
'value' => $search,
'compare' => 'LIKE'
)
)
);
}
$all_users = new WP_User_Query( $args );
$total_users = count($all_users->get_results());
$filtered_users = count($all_users->get_results());
if(isset($search) && $search != "")
{
$args = array_merge($args, $search_args);
$all_users = new WP_User_Query( $args );
$filtered_users = count($all_users->get_results());
}
$args = array_merge($args, $limit_args);
$all_users = new WP_User_Query( $args );
foreach ( $all_users->get_results() as $user ) {
$email = $user->user_email;
$user_fullname = $user->first_name . ' ' . $user->last_name;
$user_url = $user->user_url;
$user_nickname = $user->nickname;
$user_profile = $user->description;
$sub_data = array();
$sub_data[] = $email;
$sub_data[] = $user_fullname;
$sub_data[] = $user_url;
$sub_data[] = $user_nickname;
$sub_data[] = $user_profile;
$data[] = $sub_data;
}
$json_data=array(
"draw" => (isset($request["draw"]) ? $request["draw"] : 0),
"recordsTotal" => intval($total_users),
"recordsFiltered" => intval($filtered_users),
"data" => $data
);
echo json_encode($json_data);
wp_die();
}
add_action( 'wp_ajax_wpajaxusersearch', 'wpajaxusersearch' );
add_action( 'wp_ajax_nopriv_wpajaxusersearch', 'wpajaxusersearch' );