codeigniter 中的数据库错误 1054

Question

我正在尝试做一个 OTH 应用程序，但我收到了这个错误

A Database Error Occurred

Error Number: 1054

Unknown column 'data' in 'field list'

SELECT data FROM ci_sessions WHERE id = 'dd8fddaabb45c365fbf27a6fdc5ea60d59f569e4' AND ip_address = '::1'

Filename: libraries/Session/drivers/Session_database_driver.php

Line Number: 160

这是Session_database_driver.php

public function read($session_id) {
        if ($this->_get_lock($session_id) !== FALSE)
        {
            // Needed by write() to detect session_regenerate_id() calls
            $this->_session_id = $session_id;

            $this->_db
                ->select('data')
                ->from($this->_config['save_path'])
                ->where('id', $session_id);

            if ($this->_config['match_ip'])
            {
                $this->_db->where('ip_address', $_SERVER['REMOTE_ADDR']);
            }

            if (($result = $this->_db->get()->row()) === NULL)
            {
                $this->_fingerprint = md5('');
                return '';
            }

            // PostgreSQL's variant of a BLOB datatype is Bytea, which is a
            // PITA to work with, so we use base64-encoded data in a TEXT
            // field instead.
            $result = ($this->_platform === 'postgre')
                ? base64_decode(rtrim($result->data))
                : $result->data;

            $this->_fingerprint = md5($result);
            $this->_row_exists = TRUE;
            return $result;
        }

        $this->_fingerprint = md5('');
        return '';
}

Answer 1

根据关于 Sessions 基本格式的 CI 手册 ci_sessions table 中的一个是：

CREATE TABLE IF NOT EXISTS  `ci_sessions` (
    session_id varchar(40) DEFAULT '0' NOT NULL,
    ip_address varchar(45) DEFAULT '0' NOT NULL,
    user_agent varchar(120) NOT NULL,
    last_activity int(10) unsigned DEFAULT 0 NOT NULL,
    user_data text NOT NULL,
    PRIMARY KEY (session_id),
    KEY `last_activity_idx` (`last_activity`)
);

在您的 php 代码中，您使用了不同的字段：

$this->_db
                ->select('data')
                ->from($this->_config['save_path'])
                ->where('id', $session_id);

因此，将该代码更改为：

$this->_db
                ->select('user_data')
                ->from($this->_config['save_path'])
                ->where('session_id', $session_id);

您的代码应该可以工作。

Answer 2

我认为正确的解决方案是检查您的数据库是否已正确创建。

根据Documentation for CI 3.0.0，正确的数据库应该是：

    CREATE TABLE IF NOT EXISTS `ci_sessions` (
        `id` varchar(40) NOT NULL,
        `ip_address` varchar(45) NOT NULL,
        `timestamp` int(10) unsigned DEFAULT 0 NOT NULL,
        `data` blob NOT NULL,
        PRIMARY KEY (id),
        KEY `ci_sessions_timestamp` (`timestamp`)
);

我不同意更改 CI 驱动程序文件

Answer 3

我遇到了同样的问题，我已经改变了...

$this->_db
                ->select('data')
                ->from($this->_config['save_path'])
                ->where('id', $session_id);

到 ->>>>>

$this->_db
                ->select('user_data')
                ->from($this->_config['save_path'])
                ->where('session_id', $session_id);

如果我在 config.ph

中这样做，问题就会存在

$config['sess_expiration'] = 7200;
$config['sess_expire_on_close'] = TRUE;
$config['sess_encrypt_cookie'] = TRUE;
$config['sess_use_database'] = TRUE;
$config['sess_table_name'] = 'ci_sessions';
$config['sess_match_ip'] = TRUE;
$config['sess_match_useragent'] = TRUE;
$config['sess_time_to_update'] = 300;

codeigniter 中的数据库错误 1054

database error 1054 in codeigniter

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