Question

我正在使用Google图表作为柱形图。我从ajax获取数据。我的问题是当查询结果为NULL时，页面根本没有任何问题。我正在使用GET获取柱形图的数据。我不知道问题出在我的观点或我的查询中。

在我的查询中，我必须显示来自用户公司的所有订单，无论哪个用户已将它们插入表格订单项中。应该来自用户的公司。当用户公司的表orderitems中没有项目时，会出现问题。然后页面根本不加载。

如果我有查询数据，运行柱形图的脚本，如何制作。如何检查是否只有数据，以加载图表。

我的观点是：

$(document).ready(function() {

         
    google.load("visualization", "1", {packages:["corechart"]});
                  
    $.ajax({
      type: 'get',
      url: "<?= base_url() ?>index.php/receivedOrders/column_chart/",
      dataType: "json",
      // cache: false,
      success: function(jsonData){

        drawChart(jsonData);

      }
    });              
      
 
  function drawChart(jsonData) {

    var data = new google.visualization.DataTable(jsonData);
    
    var options = {     
      hAxis: {
      title: '<?php echo lang("haxis_date"); ?>',
      format: 'h:mm a',
      },
      vAxis: {
        title: '<?php echo lang("chart_average_price"); ?>'
      },
      width:'400',
      height:'300',
      backgroundColor: 'none',
      colors:['#ec8f6e', '#e6693e', '#e0440c', '#f3b49f', '#f6c7b6'],
        legend: { position: 'top', maxLines: 3,alignment: 'center' },
      };
      var chart = new google.visualization.ColumnChart(document.getElementById('column_chart'));
      chart.draw(data, options);
    }
  });

我的柱形图方法（当我调用ajax时）是：

<?php 
public function column_chart() {   
        
      $size = $this->uri->segment(3);
      $interval = $this->uri->segment(4);
      $firms = $this->Receivedorders_model->average_price_by_week($size,$interval);
     
      $p = array();
      foreach ($firms as $key => $firm) {
        $p[$key] = array('c' => array(array(
          'v' =>  $firm['interval'],  
        ),
        
     
        array(
          'v' =>  round($firm['unitPrice'],2), 
        )));
      }
      echo json_encode(array(
      'cols' => array(
          array('id' => 'name',  'label' => lang("customer"),  'type' => 'string'),
          array('id' => 'incomes', 'label' => lang("chart_average_price"),  'type' => 'number'),

        ),
        'rows' => $p

      ));
      
    }

对不起，这是返回NULL的查询。我现在找到了：

<?php
    class Receivedorders_model extends CI_Model {

    public function average_price_by_week($size = null,$interval = null) {
    $company = $this->session->userdata('logged_in')['company'];
    $now = new DateTime("now");
    $now->modify('-6 month');
    $six_months =$now->format('Y-m-d');

    $this->db->select('MIN(createdDate) AS MinDate');
    $this->db->from('ordersheader');
    $this->db->join('systemusers', 'systemusers.idSystemUsers = ordersheader.user_id');
    $this->db->where('systemusers.company', $company);
    $query=$this->db->get();
    $min = $query->row_array();
    if($min['MinDate'] > $six_months) {
    	    	  $this->db->select('DATE_FORMAT(DATE_SUB(ordersheader.createdDate, INTERVAL DAYOFWEEK(ordersheader.createdDate)-2 DAY), "%Y-%m-%d") AS "interval"',FALSE);
 $this->db->select_avg('unitPrice');
 $this->db->from('orderitems');
 $this->db->join('ordersheader', 'ordersheader.idOrder=
 orderitems.idOrder');

 $this->db->join('systemusers', 'systemusers.idSystemUsers = ordersheader.user_id');
 $this->db->where('systemusers.company', $company);
 if($size) {
  $this->db->where('orderitems.eggSize', $size);
 }
 if($interval) {
  $this->db->where('ordersheader.createdDate > ',$current);
 }
 $this->db->order_by('interval');
 $this->db->group_by('interval');
 $query=$this->db->get();
 return $query->result_array();
 } 
 else {

    			$this->db->select('DATE_FORMAT(DATE_SUB(ordersheader.createdDate, INTERVAL DAYOFMONTH(ordersheader.createdDate)-1 DAY), "%Y-%m-%d") AS "interval"',FALSE);
 $this->db->select_avg('unitPrice');
 $this->db->from('orderitems');
 $this->db->join('ordersheader', 'ordersheader.idOrder=
 orderitems.idOrder');
$this->db->join('systemusers', 'systemusers.idSystemUsers = ordersheader.user_id');
 $this->db->where('systemusers.company', $company);
 if($size) {
  $this->db->where('orderitems.eggSize', $size);
 }
 if($interval) {
  $this->db->where('ordersheader.createdDate > ',$current);
 }
 $this->db->order_by('interval');
 $this->db->group_by('interval');
 $query=$this->db->get();
 return $query->result_array();

}

}
}

我调用average_incomes_by_customer()的控制器方法是：

<?php
class ReceivedOrders extends CI_Controller{

 public function average_incomes_by_customer()
{
      
$data['dynamic_view'] = 'charts'; 
                 $data['activity_chart']=$this->Receivedorders_model->average_incomes_by_customer();

      $data['get_average_price']=$this->Receivedorders_model->get_average_price();

$this->load->view('templates/main',$data);
}
}

当查询结果为NULL

0 个答案: