Formatting JSON data from iron-form - json

Question

I'm using iron-form to send data to a Rails server. Currently the form is sending JSON similar to this:
{
"date": "January 1",
"name": "John Doe",
"company": "Whatever Inc."
}
But in order to receive it on the Rails end I need it to be formatted like this:
{
"userInfo": {
"date": "January 1",
"name": "John Doe",
"company": "Whatever Inc."
}
}
How do I nest the form data within the userInfo param? I tried using the iron-form-presubmit event listener but couldn't make it work.
Here is the code for my iron-form:
<form is="iron-form" id="form" method="post" action="url/for/api">
<input name="date" is="iron-input">
<input name="name" is="iron-input">
<input name="company" is="iron-input">
<div id="buttons">
<paper-button id="submit" raised onclick="_submit(event)">Save</paper-button>
<paper-button id="reset" raised onclick="_reset(event)">Reset </paper-button>
</div>
</form>
And the javascript:
<script>
Polymer({
is: 'my-view1',
});
function _submit(event) {
var form = Polymer.dom(event).localTarget.parentElement.parentElement;
form.submit();
}
function _reset(event) {
var form = Polymer.dom(event).localTarget.parentElement.parentElement;
form.reset();
}
</script>

Answer 1

from my understanding you could update the request body before the data gets submitted and transform the current data into an object/structure of your liking:
<form is="iron-form" on-iron-form-presubmit="_presubmit" id="form" method="post" action="url/for/api">
<input name="date" is="iron-input">
<input name="name" is="iron-input">
<input name="company" is="iron-input">
<div id="buttons">
<paper-button id="submit" raised onclick="_submit(event)">Save</paper-button>
<paper-button id="reset" raised onclick="_reset(event)">Reset </paper-button>
</div>
</form>
similar to how its done here, but changing the body entirely
function _presubmit(e) {
let body = this.$.form.request.body;
body = {"userInfo" : body };
}
Hope this helps a lil.