On 10 May 2011, at 21:32, Colin Law <clan...@googlemail.com> wrote:
> On 10 May 2011 21:23, Rodrigo Ruiz <rodrigo.ru...@gmail.com> wrote: >> Hi, I'm having some trouble to understand the following code: >> def new >> @user = User.new >> @title = "Sign up" >> end >> >> def create >> @user = User.new(params[:user]) >> if @user.save >> flash[:success] = "Welcome to the Sample App!" >> redirect_to @user >> else >> @title = "Sign up" >> @user.password = "" >> @user.password_confirmation = "" >> render 'new' >> end >> end >> Since I do '@user = User.new' in the 'new' method, why do i need to do it >> again '@user = User.new(params[:user])' instead of >> '@user.update_attributes(params[:user])' in the 'create' method? > > Each action in the controller is a new request to the web server so > the create action has no knowledge of @user set up in the new action. > It can only go by what is in params. > >> Also I don't get the difference between 'render' and 'redirect_to', what >> I read was that 'render' doesn't clean out the variables, whereas >> 'redirect_to' does, so back to the first question... > > Render will re-show the 'new' page, with the form for filling in the > new user so the user can fix the errors @user still has the values > from the data was submitted last time so the form will show the same > data again. The redirect causes the 'show' *action* to be run for the > user, which results in that user being shown. > To be complete explicit, calling render just tells rails which template to use, whereas redirect_to tells the browser that they should make a separate http request to the specified location Fred > Colin > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to rubyonrails-talk@googlegroups.com. > To unsubscribe from this group, send email to > rubyonrails-talk+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
