php - 未捕获的异常 'PDOException'，消息为 'SQLSTATE[HY093]: Invalid parameter number'

Question

每当我尝试使用 PDO 插入数据库时​​，都会收到错误。

public function save($primaryKey = "") {
        $validate = $this->rules();
        if ($validate === true) {
            $properties = '';
            $values = '';
            $bindings = array();
            $update = '';
            foreach ($this as $property => $value){
                if ($property === "conn") {
                    continue;
                }
                $properties .= $property . ',';
                $values .= ':' . $property . ',';
                $update .= $property . ' = :' . $property . ',';
                $bindings[':'.$property] = $value;
            }
            $sql_string = 'INSERT INTO ' . get_class($this) . ' (' . rtrim($properties, ',') . ') ';
            $sql_string .= 'VALUES (' . rtrim($values, ',') . ') ON DUPLICATE KEY UPDATE ' . rtrim($update, ',') . ';';
            $result = $this->executeQuery(NULL, $sql_string, $bindings);
            $this->buildObject($result);
            if (!empty($primaryKey)) {
                $this->$primaryKey = $this->conn->lastInsertId();
            }
            return $result;
        } else {
            return $validate;
        }
    }

public function executeQuery($object, $sql_string, $bindings = null) {
        $stmt = $this->conn->prepare($sql_string);
        if (!empty($bindings)) {
            if (!$stmt->execute($bindings)) {return false;}
        } else {
            if (!$stmt->execute()) {return false;}
        }
        $result = (!empty($object) ? $stmt->fetchAll(PDO::FETCH_CLASS, $object) : $stmt->fetchAll());
        return (($stmt->rowCount() > 0) ? $result : false);
    }

保存函数生成查询字符串和绑定(bind)，它们看起来都是正确的。

query = INSERT INTO am_administrator (firstName,lastName,username,password,email,isSuperUser,dateCreated,dateLastModified) VALUES (:firstName,:lastName,:username,:password,:email,:isSuperUser,:dateCreated,:dateLastModified) ON DUPLICATE KEY UPDATE firstName = :firstName,lastName = :lastName,username = :username,password = :password,email = :email,isSuperUser = :isSuperUser,dateCreated = :dateCreated,dateLastModified = :dateLastModified;

bindings = array(8) { 
[":firstName"]=> string(5) "First" 
[":lastName"]=> string(4) "Last" 
[":username"]=> string(7) "cova-fl" 
[":password"]=> string(8) "password" 
[":email"]=> string(16) "test@testing.com" 
[":isSuperUser"]=> int(1) "1" 
[":dateCreated"]=> string(19) "2016-05-11 02:40:15" 
[":dateLastModified"]=> string(19) "2016-05-11 02:40:15" 
}

每当我将查询放入工作台时，我都没有问题，但是当尝试在代码中运行它时，我得到 fatal error :未捕获的异常“PDOException”，带有消息“SQLSTATE[HY093]:无效的参数号”，这让我很困惑，因为绑定(bind)参数的数量与绑定(bind)键和数字匹配。谁能帮我解答一下这个问题？

Answer 1

我认为这可能是因为您在声明中将每个绑定(bind)声明了两次，例如:firstname 出现在 VALUES 子句以及 ON DUPLICATE KEY UPDATE 子句中。

您只将 8 个绑定(bind)传递给 $stmt->execute，但 PDO 正在寻找 16 个。

您可以尝试在 ON DUPLICATE KEY UPDATE 子句中对它们进行稍微不同的命名，为您提供一个查询，例如:


INSERT INTO am_administrator (firstName,lastName,username,password,email,isSuperUser,dateCreated,dateLastModified) VALUES (:firstName,:lastName,:username,:password,:email,:isSuperUser,:dateCreated,:dateLastModified) ON DUPLICATE KEY UPDATE名字 = :update_firstName,姓氏 = :update_lastName,用户名 = :update_username,密码 = :update_password,电子邮件 = :update_email,isSuperUser = :update_isSuperUser,dateCreated = :update_dateCreated,dateLastModified = :update_dateLastModified;