In Rails when a resource create action fails and calls render :new, why must the URL change to the resource's index url?

Question

I have a resource called Books. It\'s listed as a resource properly in my routes file.

I have a new action, which gives the new view the standard:

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Answer 1

Just had the very same question, so maybe this might help somebody someday. You basically have to make 3 adjustments in order for this thing to work, although my solution is still not ideal.

1) In the create action:

if @book.save
  redirect_to(@book)
else
  flash[:book] = @book
  redirect_to new_book_path
end

2) In the new action:

@book = flash[:book] ? Book.new(flash[:book]): Book.new

3) Wherever you parse the flash hash, be sure to filter out flash[:book].

--> correct URL is displayed, Form data is preserved. Still, I somehow don't like putting the user object into the flash hash, I don't think that's it's purpose. Does anyboy know a better place to put it in?