Grails 控制器和域
我只是有一个简单的问题，因为我仍在学习 grails。我有一个控制器类，它只读取文本文件并加载包含信息的列表。我想通过此列表填充我的域之一。我可以这样做吗？
例如，我有一个 bookController，控制器会执行类似的操作，
//psuedocode
import bookdemo.book
readFile(bookData) into list
int a = list.size
a.times {
new Book(Author:"$list.author", Title:"$list.title").save()
}
由于某种原因，它不会将其添加到列表中。我继续查看 grails，但没有找到任何相关内容，或者我错过了它。当我打印列表时，它已被填充。当我打印这本书时，它会打印出“bookdemo.book”。
如果这是非常基本的，我很抱歉，在发布这个问题的同时，我将继续挖掘 grails.org。
I just had a quick question as I'm still learning grails. I have a controller class that just reads a text file and loads a list with information. I'm wanting to populate one of my domains through this list. Am I able to do it like this?
For instance, I have a bookController, the controller does something like
//psuedocode
import bookdemo.book
readFile(bookData) into list
int a = list.size
a.times {
new Book(Author:"$list.author", Title:"$list.title").save()
}
For some reason it doesn't add it to the list. I went ahead and looked through grails but I didn't find anything relevant or I missed it. When I print the list, it's populated. When I print the book it prints out 'bookdemo.book'
My apologies if this is very basic, I'm going to continue digging through grails.org while this question is posted.
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评论（1）
我认为无论 readFile 返回什么（地图？一本书？），您都需要迭代列表。你所拥有的没有任何方法来索引列表。我不知道 $list.author 可以解决什么问题。
假设 readFile 返回一个 Map 我认为类似的东西
是在你想要的方向上（尽管我的闭包语法可能是错误的）。
I think whatever readFile returns (a map? a Book?), you need to iterate through the list. What you have doesn't have any way of indexing the list. I don't see what $list.author can resolve to.
Assuming readFile returns a Map I would think something like
is in the direction of what you want (though my closure syntax is probably wrong).