我可以将Bean用作grails而不是Map的模型吗？

Question

Short Question: I'd like to use a typed bean as a model in grails instead of a Map. Is this possible?

I'd like to do this:

def index = {
   new Person(firstName:"foo", lastName:"bar", age:30)
}

Instead of this:

def index = {
    [firstName:"foo", lastName:"bar", age:30]
} 

Long Question: I'm maintinaing a controller written by other developers and it's really difficult to understand all of the possible entries in the model. The model is populated over a number of methods. I'd like to refactor the controller to return a custom bean as the model but I was hoping that the gsp would not need to be changed.

I assumed that grails could handle either a map or a bean as a model but soon realised that passing a bean to the gsp resulted in NullPointerExceptions as properties could not be found.

I realise that my controller can return a map like:

[model: myBean]

But then I would need to go through the gsp and change all references from ${someProp} to ${model.someProp}.

I'm also aware that I can use reflection to convert my bean to a Map but I'd prefer not to do this either.

Answer 1

See render doc reference. You can find in examples

// render a template to the response for the specified bean
def theShining = new Book(title: 'The Shining', author: 'Stephen King')
render(template: "book", bean: theShining)

Answer 2

在控制器的末尾：（请注意，这将返回所有属性）

New Person().properties