Question

Guys

我有以下领域:

class Product { 
    String name, 
    String productRecord,

    static transients = [ productRecord ]
}

产品记录是一个根据产品例的补贴自动产生的领域。

因此,我想到的是,如果一个领域的例子要求产生产品注册号,是否将自动被称作一个地方?

这样做的最佳方式是什么?

Answer 1

http://gorm.grails.org/latest/hibernate/manual/#eventsAutotimestamping”rel=“nofollow noreferer”>built-in territorial Activities:

GORM supports the registration of events as methods that get fired when certain events occurs such as deletes, inserts and updates. The following is a list of supported events:

beforeInsert - Executed before an object is initially persisted to the database

beforeUpdate - Executed before an object is updated

beforeDelete - Executed before an object is deleted

beforeValidate - Executed before an object is validated

afterInsert - Executed after an object is persisted to the database

afterUpdate - Executed after an object has been updated

afterDelete - Executed after an object has been deleted

onLoad - Executed when an object is loaded from the database

查阅一些例子。

Answer 2

通常的做法是,采用一种只读取的方法,并在其中采用代相传的逻辑。例如:

class Product { 
    String name, 
    String getProductRecord{ "Record " + id },

    static transients = [ productRecord ]
}

另一个例子是here。

友情链接