我的问题是我试图连接到数据库(它有4个元素,ID,日期,时间和最后一个值(last_value)),但是由于我打算将数据放入数据库中,因此将“ message_id”元素一片空白。谁能帮我吗?
堆栈跟踪
C:\ wamp \ www \ CTEC3110 \ includes \ classes \ cw_framework \ class.CourseWorkDatabaseWrapper.php:78中的'PDOException':无效的参数编号和消息'SQLSTATE [HY093]:绑定变量的数量与令牌的数量不匹配跟踪:#0 C:\ wamp \ www \ CTEC3110 \ includes \ classes \ cw_framework \ class.CourseWorkDatabaseWrapper.php(78):PDOStatement-> execute()#1 C:\ wamp \ www \ CTEC3110 \ includes \ classes \ cw_download_message_data \ class.CourseWorkDownloadMessageDataModel.php(216):CourseWorkDatabaseWrapper-> safe_query('SELECT message _...',Array)#2 C:\ wamp \ www \ CTEC3110 \ includes \ classes \ cw_download_message_data \ class.CourseWorkDownloadMessageDataModel.php(169) :CourseWorkDownloadMessageDataModel-> do_check_if_data_exists()#3 C:\ wamp \ www \ CTEC3110 \ includes \ classes \ cw_framework \ class.CourseWorkContainer.php(126):CourseWorkDownloadMessageDataModel-> do_store_downloaded_message_data()#4 C:\ wamp \ www \ CTEC3110 \ includes \ classes \ cw_download_message_data \ class.CourseWorkDownloadMessageDataController.php(6):C:\ wamp \ www \ CTEC3110 \ includes \ classes \ cw中的CourseWorkCont第91行的.CourseWorkDatabaseWrapper.php
检查数据是否存在代码
$m_message_id = NULL;
$m_message_date = $this->c_arr_download_message_data['message-date'];
$m_message_time = $this->c_arr_download_message_data['message-time'];
$m_message_last_value = $this->c_arr_download_message_data['message-data'];
$m_sql_query_string = CourseWorkSqlQuery::does_message_exist();
$m_arr_sql_query_parameters =
array( ':message_id' => $m_message_id,
':message_date' => $m_message_date,
':message_time' => $m_message_time,
':message_last_value' => $m_message_last_value);
$this->c_obj_database_handle->safe_query($m_sql_query_string, $m_arr_sql_query_parameters);
SQL查询
public static function does_message_exist()
{
$m_sql_query_string = "SELECT message_id, message_time, message_date, message_last_value ";
$m_sql_query_string .= "FROM cw_messages ";
$m_sql_query_string .= "WHERE message_id = :message_id ";
$m_sql_query_string .= "AND message_time = :message_time ";
$m_sql_query_string .= "AND message_date = :message_date ";
$m_sql_query_string .= "AND message_last_value = :message_last_value ";
$m_sql_query_string .= "LIMIT 1";
return $m_sql_query_string;
}
查询校验码(尝试/捕获)
$m_temp = array();
$this->c_obj_database_handle->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$this->c_obj_stmt = $this->c_obj_database_handle->prepare($m_query_string);
// bind the parameters
if (sizeof($m_arr_query_parameters) > 0)
{
foreach ($m_arr_query_parameters as $m_param_key => $m_param_value)
{
$m_temp[$m_param_key] = $m_param_value;
$this->c_obj_stmt->bindParam($m_param_key+1, $m_temp[$m_param_key], PDO::PARAM_STR);
}
}
// execute the query
$m_execute_result = $this->c_obj_stmt->execute();
$this->c_arr_database_connection_messages['execute-OK'] = $m_execute_result;
$m_database_query_execute_error = false;
尝试此操作,因为您使用的是命名参数,所以将键增加1没有意义:
foreach ($m_arr_query_parameters as $m_param_key => $m_param_value)
{
$this->c_obj_stmt->bindValue($m_param_key, $m_param_value);
}
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我来说两句