hibernate - 如何在 grails 脚本中建立 Hibernate session

Question

以下 grails 脚本:

// Import.groovy

includeTargets << grailsScript("Bootstrap")

target(main: "Import some data...") {
    depends(bootstrap)

    def Channel = grailsApp.classLoader.loadClass("content.Channel")

    def c 

    // works: saving a valid Channel succeeds
    c = Channel.newInstance(title:"A Channel", slug:"a-channel", position:0).validate()

    // doesn't work: saving an invalid Channel fails with exception
    c = Channel.newInstance().validate()

    // this line is never reached due to exception
    println(c.errors)

}

setDefaultTarget(main) 

失败，但异常:

Error executing script Import: org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here

当在无效域对象上调用 validate() 时。我想在验证失败时输出错误消息，但似乎我需要建立一个 hibernate session 才能这样做。任何人都知道一种方法来克服这个？

Answer 1

找到 RunScript.groovy它为您设置 hibernate session ，然后运行您指定为参数的脚本。我不得不将我的源代码从 Gant 脚本(上图)改为:

// Import.groovy

def Channel = grailsApp.classLoader.loadClass("content.Channel")

def c 
c = Channel.newInstance(title:"A Channel", slug:"a-channel", position:0).validate()
c = Channel.newInstance().validate()
println(c.errors)

我可以像这样运行它:

$> grails run-script scripts/Import.groovy