如何间接地引用Grails GSP模型变量通过.get（...） [英] How to reference a grails GSP model variable indirectly e.g. via .get(...)

问题描述

我正在使用GSP发送基于MailService插件的电子邮件。 sendMail关闭通过（其中包括） body（view：...，model：myModel）

I'm using a GSP for sending out emails based on the MailService plug-in. The sendMail closure passes (amongst others) body(view:..., model:myModel)

我知道我可以使用GSP中的 $ {itemName} 访问myModel Map中的每个项目。然而，由于我有时想像'item'+ i 动态地构建项目名称，所以我需要一些周边的方法来访问变量。

I know that I can access every item of the myModel Map just using ${itemName} in the GSP. However as I sometimes want to build the item name dynamically like 'item'+i, I need to have some surrounding method to access the variable.

我已经尝试过 $ {model.get（'item'+ i）和 $ {params.get 'item'+ i），但是model为null，params是一个空的Map。我也尝试过pageScope，但是虽然我可以通过 $ {pageScope.itemName 访问一个项目，但我不能使用 $ {pageScope.get（'item '+ i）} 因为pageScope不是地图。

I already tried ${model.get('item'+i), and ${params.get('item'+i), but model is null and params is an empty Map. I also tried pageScope, but though I can access an item via ${pageScope.itemName, I can not use ${pageScope.get('item'+i)} because pageScope is not a Map.

可能有多种解决方案可以解决这个问题。我会很高兴一个容易的一个;-)。我看到的一个解决方案是将myModel作为唯一参数，然后始终使用 myModel.get（...），但这意味着我不得不更改我现有的所有GSP始终引用myModel而不是直接访问项目（具有固定名称）;所以如果有一种方式，我不必改变传递给GSP的模式，这将是我最喜欢的。

Probably there are multiple solutions to solve this; I'd be glad about an easy one ;-). One solution I see is to pass myModel as the only parameter and then always use myModel.get(...), however this would mean that I had to change all my existing GSPs to always refer to myModel instead of accessing items (with fixed names) directly; so if there's a way where I don't have to change the model passed to the GSP, this would be my favorite.

如果有人也可以说几句话

If someone could also say a few words about the difference of model and params in this context, this would be additionally helpful!

推荐答案

我现在使用 $ {pageScope.getProperty（...）}

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