In rails, when the resource creation operation fails and render: new is called, why must the URL be changed to the index URL of the resource?

problem ：

I have a resource called Books. I have a resource called books .It's listed as a resource properly in my routes file. It is correctly listed as a resource in my routing file .

I have a new action, which gives the new view the standard: I have a new action , It provides a standard for new views ：

@book = Book.new

On the model, there are some attributes which are validated by presence, so if a save action fails, errors will be generated. On the model , Some properties are verified by existence , So if the save operation fails , An error is generated .

In my controller: In my controller ：

@book = Book.create...  # some logicif @book.save  redirect_to(@book)else  render :newend

This is pretty standard; This is very standard ;and the rationale for using render:new is so that the object is passed back to the view and errors can be reported, form entries re-filled, etc. Use render:new The basic principle of is to pass objects back to the view and report errors 、 Refill form entries, etc .

This works, except every time I'm sent back to the form (via render :new), my errors show up, but my URL is the INDEX URL, which is It works , Except every time I am sent back to the form （ By rendering ：new） when , My mistakes will show up , But mine URL yes INDEX URL, It is

/books

Rather than instead of

/books/new

Which is where I started out in the first place. This is where I started .I have seen several others posts about this problem, but no answers. I have read several other posts on this issue , But there is no answer .At a minimum, one would assume it would land you at /books/create, which I also have a view file for (identical to new in this case). At least , People will assume that it will let you enter /books/create, I also have a view file （ In this case with new identical ）.

I can do this: I can do this ：

# if the book isn't saved thenflash[:error] = "Errors!"redirect_to new_book_path

But then the @book data is lost, along with the error messages, which is the entire point of having the form and the actions, etc. But then @book Data and error messages are lost , This is the whole meaning of having forms and operations .

Why is render :new landing me at /books, my index action, when normally that URL calls the INDEX method, which lists all the books? Why? render :new Log me in to /books, My indexing operation , Usually it's time to URL call INDEX Method , This method lists all books ？

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Solution ：

Reference resources ： https://stackoom.com/en/question/ynXG