createcriteriagrails

我试图在grails中使用createcriteria方法，但是我得到了一个空列表，我不知道为什么。 我的代码如下

    def results = PostOrder.createCriteria().list() {
        posts{
            author{
                eq('username', lookupPerson().username)
            }
        }
        picture{
            user{
                eq('username', lookupPerson().username)
            }
        }
    }

PostOrder域如下所示：

class PostOrder {

    String pOrder
    Date dateCreated
    Picture picture
    Post posts
    Video video
    Boolean favorite = false

    static hasMany = [children : Child]

    static constraints = {
        picture nullable: true
        posts nullable: true
        video nullable:  true
    }
}

 class Post {

    String message
    User author
    Date dateCreated
    Child child
    boolean postedToAll
    String tag

static hasMany = [tags:Tag]

    static constraints = {
        child nullable: true
        tags nullable: true
        tag nullable: true
     }
}

 class Picture {

    String orgName
    String urlOrg
    String urlWeb
    String urlThumb
    Date   dateCreated
    String caption
    Child child
    User user
    Album contained
    String tag
    boolean postedToAll

    static hasMany = [tags:Tag]

    static constraints = {
        orgName blank: false
        caption maxSize: 500
        tags nullable:  true
        caption nullable: true
        tag nullable: true
        child nullable:  true
    }
}

职位如下:

class PostOrder {

    String pOrder
    Date dateCreated
    Picture picture
    Post posts
    Video video
    Boolean favorite = false

    static hasMany = [children : Child]

    static constraints = {
        picture nullable: true
        posts nullable: true
        video nullable:  true
    }
}

 class Post {

    String message
    User author
    Date dateCreated
    Child child
    boolean postedToAll
    String tag

static hasMany = [tags:Tag]

    static constraints = {
        child nullable: true
        tags nullable: true
        tag nullable: true
     }
}

 class Picture {

    String orgName
    String urlOrg
    String urlWeb
    String urlThumb
    Date   dateCreated
    String caption
    Child child
    User user
    Album contained
    String tag
    boolean postedToAll

    static hasMany = [tags:Tag]

    static constraints = {
        orgName blank: false
        caption maxSize: 500
        tags nullable:  true
        caption nullable: true
        tag nullable: true
        child nullable:  true
    }
}

最后图片如下：

class PostOrder {

    String pOrder
    Date dateCreated
    Picture picture
    Post posts
    Video video
    Boolean favorite = false

    static hasMany = [children : Child]

    static constraints = {
        picture nullable: true
        posts nullable: true
        video nullable:  true
    }
}

 class Post {

    String message
    User author
    Date dateCreated
    Child child
    boolean postedToAll
    String tag

static hasMany = [tags:Tag]

    static constraints = {
        child nullable: true
        tags nullable: true
        tag nullable: true
     }
}

 class Picture {

    String orgName
    String urlOrg
    String urlWeb
    String urlThumb
    Date   dateCreated
    String caption
    Child child
    User user
    Album contained
    String tag
    boolean postedToAll

    static hasMany = [tags:Tag]

    static constraints = {
        orgName blank: false
        caption maxSize: 500
        tags nullable:  true
        caption nullable: true
        tag nullable: true
        child nullable:  true
    }
}

---

对我来说，这很好用，有人能理解为什么is没有吗？

它在图片和帖子中的用户名都相同吗？？？

---

如果没有，则必须用and或{}包围它们，因为默认情况下使用and逻辑

可能您应该添加如下逻辑块（and/or）：

def results = PostOrder.createCriteria().list() {
    or {
        posts{
            author{
                eq('username', lookupPerson().username)
            }
        }
        picture{
            user{
                eq('username', lookupPerson().username)
            }
        }
    }
}

---

你想找到什么？尝试删除帖子或图片并查看结果。我希望获得所有PostOrder实例，其中帖子中的作者等于当前用户，图片中的用户等于当前用户。请确保您有一篇包含图片的帖子。启用HibernateSQL输出也很好，然后您可以看到GORM正在运行的查询。这可以在

DataSource.groovy

中完成，方法是在

DataSource{}

块中添加

logSql=true

。您得到的是一个空列表-您确定答案是错误的吗？i、 e.您是在单元/集成测试中运行此查询，还是在实际数据库中运行此查询？您是否有与正在运行的查询实际匹配的数据？