Hello,

I am still new to Rails and have been trying to understand forms and
form_for, but it seems there are a number of ways to do / specify
things that all work fine. For example, I created this simple example
that works exactly how it should:

http://pastie.caboo.se/75110

My questions are:

- I see many people do <% form_for :category, @category ... %> ,
whereas I did just <% form_for :category .. %> . Someone said this
would be so the @category instance variable would be available to
prepopulate the form on validation, but my example successfully
prepopulates the form just fine on validation without the addition of
@category. Why?

- Doing :object =>  f causes us to use the 'form' object when
specifying methods like form.text_field. Where did 'form' come from? I
noticed I can achieve the same thing doing :locals =>  { :f => f } and
then using f.text_field in the helper.

Thanks for the help in understanding this.


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