Question

A newbie question regarding the ActiveRecord‘s save method.
If i have this code (as in rails guide):

def create
  @post = Post.new(params[:post])

  if @post.save
      redirect_to @post
  else
      .....
  end
end

The save method returns the new created Post object? How, after the code @post.save, rails know how to substitute the redirect_to @post with the proper post_id (1 or 2 or 3 or ….) to build the link?

Answer 1

I’m going to explain it by presenting another piece of code that should make things easy to understand

def create
    @user = User.new(params[:user])
    if @user.save
      redirect_to @user

Now :user contains the following information based on the User model: id, name, email, telephone.

So that means we have actually assigned to @user the above hashes.

The redirect_to will retrieve the hashes that is already stored in @user and display the new profile page.

I hope it helped.