我有以下模型中的代码。我正在加载商品详情页面,但它给了我错误
public static class Logger
{
private static TelemetryClient _logger;
public static void Log(string message)
{
_GetLogger().TrackTrace(message);
_Flush();
}
public static TelemetryClient _GetLogger()
{
if (_logger is null)
{
TelemetryConfiguration.Active.InstrumentationKey = "your key";
_logger = new TelemetryClient();
}
return _logger;
}
public static void _Flush()
{
if (_logger is null)
{
TelemetryConfiguration.Active.InstrumentationKey = "your key";
_logger = new TelemetryClient();
}
_logger.Flush();
}
public static async Task DoSomethingAsync()
{
await Task.Delay(1000);
}
}
Statistic_model:
Severity: Notice
Message: Undefined index: viewc
Filename: statistics/Statistic_model.php
Line Number: 551
您知道如何解决此错误吗?
答案 0 :(得分:2)
该错误表示索引viewc
不在数组$query->result_array()
中很可能是因为您的查询失败或返回了null。您应该养成这样做的习惯:
$query = $this->db->get();
if ($query->num_rows() > 0) {
return $query->row()->viewc;
}
return false; // or in this case 0 or whatever
答案 1 :(得分:1)
在您的代码中,您从数据库的多个数组中选择数据,然后将at分配给单个数组之类的变量。 您的代码。...
$row = $query->result_array();
$count=$row['viewc'];
正确的方法是在您分配变量的过程中。...
$data = array();
foreah($row as $key => $value){
$data[$key] = $value['viewc'];
}