```ruby
<%= assoc -%> :<%= ref -%><%= ref =~ /_/ ? ", key: :#{ref.camelize(:lower)}" : '' -%>
```

Comment asso key by default
user
```ruby
<%= assoc -%> :<%= ref -%><%= ref =~ /_/ ? "#, key: :#{ref.camelize(:lower)}" : '' -%>
```
assistant