Question

编程自己很新，所以请原谅愚蠢的错误..我有一个拒绝工作的PDF MySQL声明。我可以通过Ajax / POST成功传递数据，但它不适用于数据库。

我已根据以下指南PDO Class准备了一个“数据库”类，并将其扩展到包含以下功能的“电子邮件”类：

public function updateEmailTemplate($emailTemplateDescription, 
                $emailTemplateSubject, $emailTemplateBody,
                $emailTemplateType, $id)
{
    $this->query('UPDATE email_templates 
                     SET emailTemplateTitle = :title,
                         emailTemplateSubject = :subject,
                         emailTemplateBody = :body, 
                         emailTemplateType = :type 
                   WHERE emailTemplateID= :id');        
    $this->bind(':title', $emailTemplateDescription);
    $this->bind(':subject', $emailTemplateSubject);
    $this->bind(':body', $emailTemplateBody);
    $this->bind(':type', $emailTemplateType);
    $this->bind(':id', $id);
    $this->execute();

    if ($this->lastInsertId() == true) {
        echo 'Template added successfully';
    } else {
        echo 'There was an error';
    }
}

我可以通过在函数运行时“回显”数据来验证它是否确实收到了变量参数。

当它运行但我只是得到“有一个错误”并且数据库中没有更新任何想法？

根据要求我也添加了基于数据库类的代码

class Database{
    private $host      = "localhost";
    private $user      = "root";
    private $pass      = "MyP@ymentPortal";
    private $dbname    = "mppcompany";
    private $dbh;
    private $error;
	private $stmt;
 
    public function __construct(){
        // Set DSN
        $dsn = 'mysql:host=' . $this->host . ';dbname=' . $this->dbname;
        // Set options
        $options = array(
            PDO::ATTR_PERSISTENT    => true,
            PDO::ATTR_ERRMODE       => PDO::ERRMODE_EXCEPTION
        );
        // Create a new PDO instanace
        try{
            $this->dbh = new PDO($dsn, $this->user, $this->pass, $options);
        }
        // Catch any errors
        catch(PDOException $e){
            $this->error = $e->getMessage();
			echo 'ERROR: ' . $e->getMessage();
        }
    }
	
	
	public function query($query){
    $this->stmt = $this->dbh->prepare($query);
}
	

    public function bind($param, $value, $type = null){
    if (is_null($type)) {
        switch (true) {
            case is_int($value):
                $type = PDO::PARAM_INT;
                break;
            case is_bool($value):
                $type = PDO::PARAM_BOOL;
                break;
            case is_null($value):
                $type = PDO::PARAM_NULL;
                break;
            default:
                $type = PDO::PARAM_STR;
        }
    }
    $this->stmt->bindValue($param, $value, $type);
}


public function execute(){
    return $this->stmt->execute();
}


public function resultset(){
    $this->execute();
    return $this->stmt->fetchAll(PDO::FETCH_ASSOC);
}


public function single(){
    $this->execute();
    return $this->stmt->fetch(PDO::FETCH_ASSOC);
}


public function rowCount(){
    return $this->stmt->rowCount();
}


public function lastInsertId(){
    return $this->dbh->lastInsertId();
}


	
public function beginTransaction(){
    return $this->dbh->beginTransaction();
}


public function endTransaction(){
    return $this->dbh->commit();
}


public function cancelTransaction(){
    return $this->dbh->rollBack();
}


public function debugDumpParams(){
    return $this->stmt->debugDumpParams();
}


}

这是完整的扩展类代码

class email extends Database {


public function emailTemplates() {

       $this->query('SELECT * FROM email_templates');
        $rows = $this->resultset();
		return $rows;
    }
	
	
public function selectOneEmail($id) {

       $this->query('SELECT * FROM email_templates WHERE emailTemplateID=:id');
        $this->bind(':id', $id);
		$this->execute();
		$row = $this->single();
	    return $row;
	}





 public function createEmailTemplate($emailTemplateDescription, $emailTemplateSubject, $emailTemplateBody) {

        $this-> query('INSERT INTO email_templates (emailTemplateTitle, emailTemplateSubject, emailTemplateBody, emailTemplateType) VALUES (:title, :subject, :body, 1)');

        $this-> bind(':title', $emailTemplateDescription);
        $this-> bind(':subject', $emailTemplateSubject);
        $this-> bind(':body', $emailTemplateBody);

        $this-> execute();

        if ($this-> lastInsertId() == true) {
            echo 'Template added successfully';
        } else {
            echo 'There was an error';
        }


    }
	
	
	
	
	 public function updateEmailTemplate($emailTemplateDescription, $emailTemplateSubject, $emailTemplateBody, $emailTemplateType, $id) {

$this->query('UPDATE email_templates SET emailTemplateTitle = :title, emailTemplateSubject = :subject, emailTemplateBody = :body, emailTemplateType = :type WHERE emailTemplateID= :id');
				
        $this-> bind(':title', $emailTemplateDescription);
        $this-> bind(':subject', $emailTemplateSubject);
        $this-> bind(':body', $emailTemplateBody);
		 $this->bind(':type', $emailTemplateType);
		$this-> bind(':id', $id);
        $this-> execute();
		


    }
	
	

	public function deleteEmailTemplate($id)
{
$this->query('DELETE FROM email_templates WHERE emailTemplateID=:id');
$this->bind(':id', $id);
$this->execute();

if ($this->execute() > 0)
{echo 'Template Deleted';
}else{
echo 'Error Deleting Template';
}}

	
	
	
	
	
	
	
}

Answer 1

罪魁祸首是lastInsertId() - 顾名思义，它会从最后一个插入返回auto_increment - 但你不会做任何插入。

因此，您需要使用不同的方法检查是否成功，也许仅使用异常即可。

PDO MysQL“更新”语句未保存到DB

1 个答案: