Ember/Rails: Modelling contact form

I'm building an application with Ember and Rails which has a contact form for new customers with the following fields:

• email
• name
• phone
• subject
• message

The Rails backend has already models for customer and messages. The attributes email, name and phone are customer data and subject and message will be part of the messages model in Rails.

Now, I'm wondering how I should design the ember model since the data of the form has to be distributed to two different backend models. I'm thinking of:

1. Having a message and a customer model ready in Ember and trying to split the data somewhere in Ember and save to the corresponding models. (Seems complicated).
2. Creating a "virtual" model in Rails which receives data from a contact form model in Ember with exactly the submitted fields. The contact model in Rails sorts the incoming data out and saves it correspondingly to customer and message.

I would probably go for the second option since I'm more experienced in Rails then in Ember but I hope somebody could give me a hint what is the proper way to handle models which have no exact equivalent on the backend.