我希望允许用户遍历域类并打印出转储的内容。我的第一个问题:假设下面的工作很好:
//this works
class EasyStuffController{
def quickStuff = {
def findAThing = MyDomainClass.findByStuff(params.stuff)
[foundThing:findAThing]
}
}
什么是正确的方式来写下我想要说的话:
//this doesn't
class EasyStuffController{ servletContext ->
def quickStuff = {
def classNameString = "MyDomainClass" //or params.whichOne something like that
def domainHandle = grailsApplication.domainClasses.findByFullName(classNameString)
//no such property findByFullName
def findAThing = domainHandle.findByStuff(params.stuff)
[foundThing:findAThing]
}
}
//this also doesn't
class EasyStuffController{ servletContext ->
def quickStuff = {
def classNameString = "MyDomainClass" //or params.whichOne something like that
def domainHandle
grailsApplication.domainClasses.each{
if(it.fullName==classNameString)domainHandle=it
}
def findAThing = domainHandle.findByStuff(params.stuff)
//No signature of method: org.codehaus.groovy.grails.commons.DefaultGrailsDomainClass.list() is applicable
[foundThing:findAThing]
}
}
上面的那些行根本不起作用。我试图让用户能够选择任何域类,并用“stuff”取回它。假设:所有域类都有一个相同类型的Stuff字段。
发布于 2011-06-14 09:54:28
如果你知道完整的包,你可以使用这个:
String className = "com.foo.bar.MyDomainClass"
Class clazz = grailsApplication.getDomainClass(className).clazz
def findAThing = clazz.findByStuff(params.stuff)
如果你不使用包,这也是可行的。
如果您使用包,但用户将只提供没有包的类名,并且名称在所有包中都是唯一的,那么您可以使用以下代码:
String className = "MyDomainClass"
Class clazz = grailsApplication.domainClasses.find { it.clazz.simpleName == className }.clazz
def findAThing = clazz.findByStuff(params.stuff)
https://stackoverflow.com/questions/6338148
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