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grailsgrails3

Name value pairs in Grails Views

I have a Header class like so:

class Header {
  String name
  String value
}

I have a Grails View like this:

model {
  Set<Header> headers
}

json {
  headers ....
}

I want to produce JSON formatted like this:

{
  "headers": {
    "Host": "xyz.com",
    "Other-Header": "da value"
  }
}

I tried generating the JSON value by hand, but Grails just put it inside quotes. So that didn't work.

Solution

  • Convert the Set<Header> to a Map<String, String> first:

    model {
    Set<Header> headers
}

json {
    headers renderHeaders(email.headers)
}

static Map<String, String> renderHeaders(Set<Header> headers) {
    Map<String, String> res = [:]
    for (Header header : headers) {
        res[header.name] = header.value
    }
    return res
}