如何在grails中设置自动增量的起始值 [英] how set start value for auto increment in grails

问题描述

我正在使用域类中的自定义自动增量键

I am using my custom auto increment key in my domain class using

 static mapping = { id generator: 'increment', name: 'personId' }

是否可以从特定值开始自动递增，例如从100开始?

Is it possible to start the auto increment from a particular value , say start from 100 ?

推荐答案

您可以使用org.hibernate.id.enhanced.SequenceStyleGenerator生成器设置自动增量的初始值.该生成器采用参数initial_value，它将是第一个id的值. (然后，它将像以前一样增加1.)

You can set the initial value of the autoincrement by using the org.hibernate.id.enhanced.SequenceStyleGenerator generator. This generator takes the parameter initial_value, which will be the the value of your first id. (And after that, it will increment by 1, just like you are used to.)

static mapping = {
    id(generator: 'org.hibernate.id.enhanced.SequenceStyleGenerator', 
        params: [sequence_name: 'start_seq', initial_value: 100])
}

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