grails - Grails 2.4.4:hasOne无法解决双向关系

Question

我有两个表用户和角色

为了安全起见，这两个表应具有双向关系，因此我遵循了Users表中的 hasOne 组合，而角色表中的属于。但是双向关系并没有发生。

有人可以帮忙吗？

class User
{

    Long number
    Integer inhabitants

    static hasOne = [ role: Role]

    static constraints = {
        role nullable: true, unique: true
    }
}

class Role
{

     Users user
     static belongsTo = [user: Users ] 
     static constraints = {
     }
}

Answer 1

将Role更改为

class Role
{

     Users user
     static belongsTo = [user: User ] //you previously had Users here
     static constraints = {
     }
}