I am using this succesfully if I follow the example and use the country collection for the select.
Should it be possible to edit a has_many field?
I have product belongs to category and category has many products
So in my show view of the product I have
<%= product.category.name if product.category_id %>
and in my new I have
<%= f.collection_select :category_id, Category.for_collection,:id,:name %>
So I am not sure how to get this to work with In place select editor field.
Thank you Russell