Hi there,

I have an author model and a book model.

I'm trying to create a "add new book" link for each author from the
authors index page, that would point to a new book page, with the the
author select field already "selected" to the good option.
the author select in the new book form is created with
collection_select().

I don't know how to pass such a variable in a url using rails url
schema. I've looked in the link_to documentation, but nothing about
this specific case.

any help would be greatly appreciated,
thanks in advance.

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