场景如下：每个Process都有多个ProcessingSteps
我写的代码能够获取所有进程，而不需要对应于ProcessingSteps。
我知道我漏掉了一个where子句，我想问一下我们在Grails中是如何做到这一点的。
我只想为每个Process获取相应的ProcessingStepUpdate
我有两个域类ProcessingStep和ProcessingStepUpdate

package a.b.c
public class ProcessingStep {
    Process process
}
public class ProcessingStepUpdate{
static belongsTo = [processingStep: ProcessingStep]
ProcessingStep processingStep
}

字符串
这是我写的剧本

Process.list(max:1).each {
    //List<ProcessingStep> test2= ProcessingStep.findAllByProcess(it)
    //println it
    def test3 = ProcessingStep.createCriteria().list() {
        eq("process",it)
    }
    println it
    it.list().each {
        //not telling it where to get the list from 
        ProcessingStep.list().each { pstep ->
            def test4 = ProcessingStepUpdate.createCriteria().list() {
                eq("processingStep",pstep)
                // Projections are aggregating, reporting, and
                // filtering functions that can be applied after
                // the query has finished.
                // A common use for projections is to summarize data
                // in a query
                /* projections{
                    groupProperty("processingStep")
                }*/
            }
            println pstep
            //List<ProcessingStepUpdate> test = ProcessingStepUpdate.findAllByProcessingStep(it)
            //List<ProcessingStepUpdate> test = ProcessingStepUpdate.findWhere()
            //println "it"
        }
    }
}

型
我一直在这个问题上停留在一天..新的OOPS世界！