如何将值直接从控制器传递到Grails中的javascript文件

Question

Would like to pass directly from the controller to a JavaScript file.

TestControler.groovy

def list() {
    render (view: "list", model:[theId: theId])
}

Test.js

function test() {
   // do smth with theId
}

Found solution have the rendered gsp in the middle, ie this one , but I would like to know if there is a way to avoid that including using hidden fields or having in the gsp file a javascript code snippet such as:

<g:javascript>
   function test(${theId}) {
       // do smth with theId
   }
</g:javascript>

Answer 1

Unfortunately there does not seem to be anything that covers what you're looking for. The best approach that I have seen, and have used myself, is to use hidden fields in the gsp/html, and retrieve those values from javascript on the client side.

Answer 2

I have had similar issue this is how I solved it.

say you have this controller:

def list() {
    render (view: "list", model:[theId: theId])
}

Then on your view( list.gsp)

<g:javascript>
   var theId = ${theId}
</g:javascript>

Then your function on the external file can do anything with variable theId because it global variable.

function test() {
   // do smth with theId
}

Personally I was having a complex json object so instead of coding the json into html and prasing it back to json when needed on the client side, I just put it as js json variable from my gsp and then I can do whatever I want from the client side