java - 在grails中生成与原始Domain类具有相同字段的新Domain类

每当在当前表中更改字段时，我都必须将旧数据保存到历史表中。因此，我必须创建一个与原始Domain类具有相同字段的历史Dom​​ain类。现在，我将手动创建历史记录Domain类，并在原始表中更新值时将较旧的数据保存到其中。
每当创建新的Domain类时，是否有一种方法可以自动生成具有相同字段的历史Dom​​ain类。

主域类是:

class Unit {

    String name
    String description
    Short bedrooms = 1
    Short bathrooms = 1
    Short kitchens = 1
    Short balconies = 0
    Short floor = 1
    Double area = 0.0D
    Date expDate
    Date lastUpdated

    static hasMany = [tenants:Tenant]
    static belongsTo = [property: Property]
}

History Domain类应如下所示:

class UnitHistory {

    String name
    String description
    Short bedrooms = 1
    Short bathrooms = 1
    Short kitchens = 1
    Short balconies = 0
    Short floor = 1
    Double area = 0.0D
    Date expDate
    Date lastUpdated

    static hasMany = [tenants:Tenant]
    static belongsTo = [property: Property]
}

最佳答案

也许您可以将beforeInsert和beforeUpdate方法添加到Unit域中，如下所示:

class Unit {

    String name
    String description
    Short bedrooms = 1
    Short bathrooms = 1
    Short kitchens = 1
    Short balconies = 0
    Short floor = 1
    Double area = 0.0D
    Date expDate
    Date lastUpdated

    def beforeInsert() {
        addHistory()
    }

    def beforeUpdate() {
        addHistory()
    }

    def addHistory(){
        new UnitHistory( this.properties ).save( failOnError: true )
    }
}