Validation for multiple models

How can i use form validations with multiple models? For example:
model: function() {
        return Ember.RSVP.hash({
            company: this.store.createRecord('company')
            accounts: this.store.createRecord('accounts')
        });
}
I thought it could be like the following, but it didn't work.
{{em-input property="model.company.name"}}
