Grails 1.3.7中保存的域类上缺少MethodException

在域对象上调用save方法时遇到问题。错误是：

groovy.lang.MissingMethodException: No signature of method: static my.awesome.Class.FeedHit.save() is applicable for argument types: () values: []
Possible solutions: save(), save(java.lang.Boolean), save(java.util.Map), wait(), any(), wait(long)

我将遍历FeedHits数组，更新一个标志，然后调用save方法：

void updateFeedHits(Set<FeedHit> list, FeedHitStatus status) {
    for (FeedHit feedHit: list) {
        feedHit.status = status
        try {
            feedHit.save()
        } catch (Exception ex) {
            log.info("unknown exception during update FeedHit", ex)
        }
    }
}

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如果要在grails之外使用域类，则需要对GORM函数进行注释。看

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我建议您使用本机线程以外的其他方法。试试：

什么是

alertHit

，它在哪里声明？你能发布域对象吗？你什么时候调用updateFeedHits方法？@IanRoberts:copy-pasteerror@chalimartines：tomcat启动时创建/启动线程。此线程将唤醒，然后检查URL中的数据。当检测到数据时，FeedHit对象将被创建并与上述代码一起保存。它位于服务类中。石英插件已被使用。我在简化这个例子。经进一步检查，save（）函数不在服务中。调试他人代码的乐趣，在他们离开很久之后。重构代码以将保存放回grails解决了这个问题。

class FeedHit {

    Feed feed
    String title
    String body
    String url
    FeedHitStatus status
    String sourceId
    String hash
    Date publishedDate
    Date dateCreated = new Date()
    Integer pos = -1

    static constraints = {
        alert(nullable: true)
        title(nullable: true)
        body(nullable: true)
        url(nullable: true)
        status(nullable: true)
        sourceId(nullable: true)
        hash(nullable: true)
        pos(nullable: true)
        publishedDate(nullable: true)
        dateCreated(nullable: true)
    }

    static mapping = {
        table('alert_hit')
        autoTimestamp false
        version(false)
        alert(column: 'alert_id')
        body(sqlType: 'text')
        url(sqlType: 'text')
        sourceId(column: 'sourceId')
        publishedDate(column: 'publishedDate')
        dateCreated(column: 'dateCreated')
    }

    /**
     * Generates a hash from title, body and url.
     */
    public AlertHit generateHash() {
         StringBuffer sb = new StringBuffer();
        if (this.title != null) {
            sb.append(this.title);
        }
        if (this.body != null) {
            sb.append(this.body);
        }
        if (this.url != null) {
            sb.append(this.url);
        }
        if (this.publishedDate != null) {
            sb.append(this.publishedDate.getTime());
        }
        if (sb.length() > 0) {
            hash = Md5Hash.hash(sb.toString());
        }
        this
    }

    @Override
    public String toString() {
        return "AlertHit{" +
            "id=" + id +
            ", alert=" + alert +
            ", title='" + title + '\'' +
            ", body='" + body + '\'' +
            ", url='" + url + '\'' +
            ", status=" + status +
            ", sourceId='" + sourceId + '\'' +
            ", hash='" + hash + '\'' +
            ", publishedDate=" + publishedDate +
            ", dateCreated=" + dateCreated +
            ", pos=" + pos +
            ", version=" + version +
            '}';
    }
}