在Polymer core-ajax中传递嵌套对象

Question

I am trying to pass a nested object to Polymer core-ajax. Here is the code:

<core-ajax url="DSPUser1.php" method="POST" on-core-response="{{responseventDSPUser}}" params='{"userID":"Anon", "transactionType":"DSPUser", "payload":{"id":"1"}}' handleAs="json" id="transactionDSPUser" response="{{msgout}}">``

When I look at the POST in the Chrome tools I see the following under Form Data:

userID:Anon
transactionType:DSPUser
payload:[object Object]

It looks as if core-ajax is not handling nested objects.

Is this a feature or a bug?

Should I be using body instead of params?

Regardless is there a way to pass a nested object using core-ajax?

PS When I use JQuery $.POST Chrome shows the following for Form Data for a similar request

transactionType:DSPUSER
userdID:Anonymous
securityToken:
payload[iD]:1

Answer 1

If Im not wrong, params are converted into queryString. For POST operations you should use body instead.