Question

我想在名为 SIZE （整数）的列中添加1，这是我的查询：

$this->dbsections->update('sections', "SIZE = SIZE + 1");

但是在错误消息中，它显示为：

UPDATE `sections` SET `SIZE = SIZE +` 1 = '' WHERE `NAME` = 'ABC'

Answer 1

您可以重写更新查询

public class EmailBuilder
    {
        public string Sender { get; set; }
        public string Receiver { get; set; }
        public string Subject { get; set; }
        public string Body { get; set; }
        public int SmtpServerPort { get; set; }
        public string SmtpServerAddress { get; set; }

        private MailMessage _mail;

        public EmailBuilder()
        {
            this._mail = new MailMessage();

            this.SmtpServerAddress = CmsConstants.smtpServerAddress;
            this.SmtpServerPort = CmsConstants.smtpServerPort;
        }

        public void SetEmail(string receiver, string subject, string body)
        {
            this._mail.To.Add(receiver);
            this._mail.From = new MailAddress("noreply@noreply.se");
            this._mail.Subject = subject;
            this._mail.Body = body;
            this._mail.Bcc.Add("noreply@noreply.se");
        }
}

set（）也会接受一个可选的第三个参数（$ escape）如果设置为FALSE
，将阻止数据被转义

阅读https://www.codeigniter.com/userguide3/database/query_builder.html#updating-data

Answer 2

你可以试试这个：

$this->dbsections->query("UPDATE sections SET SIZE = SIZE + 1 WHERE NAME = 'ABC'");

Codeigniter使用增量更新mysql数据

2 个答案: