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javascript - ChartJS changing displayed data based on date?

I have a simple section in which I am displaying data from the database , in my database I have two tables which shares 'sid` (session id); my tables looks like this.

Events table

id  sid                                    targetbuttonid

1   1377Qqng1hn4866h7oh0t3uruu27dm5        Yes
2   9021391Q86nog1028jnoqol8bqcrt182o7     No
3   541Qqta8cs8s6kv60fei8i6jbesg36         Yes

And

Sessions table

id  sid                                    datetime

1   1377Qqng1hn4866h7oh0t3uruu27dm5        2019-08-07 07:00:03
2   9021391Q86nog1028jnoqol8bqcrt182o7     2019-08-07 07:00:11
3   541Qqta8cs8s6kv60fei8i6jbesg36         2019-08-13 09:56:51

I am displaying these data using charts js on pie chart like this

HTML

<body>

        data from <input type="text" id = "firstdatepicker" name = "firstdatepicker">
        to  <input type="text" id = "lastdatepicker" name = "lastdatepicker">
            <input type="button" name="filter" id="filter" value="Filter" class="btn btn-info" /> 


        <canvas id="myPieChart" width="400" height="400"></canvas>
</body>

UPDATE.

JS

  $(document).ready(function(){  
       $.datepicker.setDefaults({  
            dateFormat: 'yy-mm-dd'   
       });  
       $(function(){  
            $("#firstdatepicker").datepicker();  
            $("#lastdatepicker").datepicker();  
       });  
       $('#filter').click(function(){  
            var from_date = $('#firstdatepicker').val();  
            var to_date = $('#lastdatepicker').val();  
            if(from_date != '' && to_date != '')  
            {  
                 $.ajax({  
                      url:"https://meed.audiencevideo.com/admin/chats/stats.php",  
                      type:"GET",  
                      data:{from_date:from_date, to_date:to_date},  
                      success:function(data){  
                        var session= data[0].sessions;
                        var yes = data[0].num_yes;
                        var no =data[0].num_no;
                        var ctx = document.getElementById("myPieChart");
                        var myChart = new Chart(ctx, {
                          type: 'pie',
                          data: {
                              labels: ["sessions","yes", "no"],
                              datasets: [{
                                label: 'Genders',
                                data: [session,yes, no],
                                backgroundColor: [
                                    'rgba(255, 99, 132, 0.2)',
                                    'rgba(54, 162, 235, 0.2)',
                                    'rgba(54, 162, 235, 1)'
                                ],
                                borderColor: [
                                    'rgba(255,99,132,1)',
                                    'rgba(54, 162, 235, 1)',
                                    'rgba(255, 99, 132, 0.2)',
                                ],
                                borderWidth: 1
                            }]
                        },

                        });
                      }  
                 });  
            }  
            else  
            {  
                 alert("Please Select Date");  
            }  
       });  
  });  

Here is php.

<?php
//setting header to json
header('Content-Type: application/json');

//database
define('DB_HOST', 'localhost');
define('DB_USERNAME', 'vvvv');
define('DB_PASSWORD', 'vvvvv');
define('DB_NAME', 'vvvvv');

$firstdate = $_POST['firstdatepicker'];
$lastdate = $_POST['lastdatepicker'];
//get connection
$mysqli = new mysqli(DB_HOST, DB_USERNAME, DB_PASSWORD, DB_NAME);

if(!$mysqli){
  die("Connection failed: " . $mysqli->error);
}

if (isset($_POST['firstdatepicker'])) {

  $firstDate= $_POST['firstdatepicker'];
  $lastDate= $_POST['lastdatepicker'];

  $sql = sprintf("SELECT count(*) as num_rows, datetime, count(distinct sid) as sessions, sum( targetbuttonname = 'yes' ) as num_yes, sum( targetbuttonname = 'no' ) as num_no from events AND time BETWEEN '$firstdate' AND '$lastdate'  ORDER BY datetime DESC");
}

//$query =sprintf("SELECT SUM( sid ) as session , COUNT( targetbuttonname ) as yes FROM events WHERE targetbuttonname LIKE  'Yes'");
$query = sprintf("SELECT count(*) as num_rows, count(distinct sid) as sessions, sum( targetbuttonname = 'yes' ) as num_yes, sum( targetbuttonname = 'no' ) as num_no from events;");
//execute query
$result = $mysqli->query($query);

//loop through the returned data
$data = array();
foreach ($result as $row) {
  $data[] = $row;
}

$result->close();

$mysqli->close();
print json_encode($data);

Now I want when user select date between certain dates, in pie chart it should display data based on those dates selected by user.

Unfortunately now when I select the dates data still the same live demo

What am I doing wrong in my codes?.

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1 Reply

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by (71.8m points)

Since you asked me to take a look at your question I recreated the whole client side in this snippet and it's all working as expected. The error must be in the php code.

I never did php myself but I'll updated the answer if I find what's wrong with it. If I were to take a guess I would say that you need to use the $sql somewhere.

// bypass CORS
jQuery.ajaxPrefilter(function(options) {
    if (options.crossDomain && jQuery.support.cors) {
        options.url = 'https://cors-anywhere.herokuapp.com/' + options.url;
    }
});
// updated code
$(document).ready(function() {
  $.datepicker.setDefaults({
    dateFormat: 'yy-mm-dd'
  });
  $("#firstdatepicker").datepicker();
  $("#lastdatepicker").datepicker();
  $('#filter').click(function() {
    var from_date = $('#firstdatepicker').val();
    var to_date = $('#lastdatepicker').val();
    if (from_date != '' && to_date != '') {
      console.log(from_date, to_date);
      $.ajax({
        url: "https://meed.audiencevideo.com/admin/chats/stats.php",
        type: "GET",
        data: {
          from_date: from_date,
          to_date: to_date
        },
        success: function(data) {
          console.log(data[0])
          var session = data[0].sessions;
          var num_yes = data[0].num_yes;
          var num_no = data[0].num_no;
          var ctx = document.getElementById("myPieChart");
          var myChart = new Chart(ctx, {
            type: 'pie',
            data: {
              labels: ["Sessions", "Yes", "No"],
              datasets: [{
                label: 'Genders',
                data: [session, num_yes, num_no],
                backgroundColor: [
                  'rgba(255, 99, 132, 0.2)',
                  'rgba(54, 162, 235, 0.2)',
                  'rgba(54, 162, 235, 1)'
                ],
                borderColor: [
                  'rgba(255,99,132,1)',
                  'rgba(54, 162, 235, 1)',
                  'rgba(255, 99, 132, 0.2)',
                ],
                borderWidth: 1
              }]
            },

          });
        }
      });
    } else {
      alert("Please Select Date");
    }
  });
});
canvas {display: block;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.9.2/jquery-ui.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.9.2/jquery.ui.datepicker.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.8.0/Chart.min.js"></script>

<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.9.2/themes/sunny/jquery-ui.min.css"></link>
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.8.0/Chart.min.css"></link>

data from <input type="text" id="firstdatepicker" name="firstdatepicker" value="19-08-13"><br> to <input type="text" id="lastdatepicker" name="lastdatepicker" value="19-08-14">
<input type="button" name="filter" id="filter" value="Filter" class="btn btn-info" />
<canvas id="myPieChart" width="400" height="400"></canvas>

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