Hello, I have a page where user can register him/herself to the site. If the user enters something wrong, or leaves blank textboxes, I want to reload the page and tell the user what went wrong. Also the textbox-values the user already entered, should be kept in the textboxes. For example, in my user-controller: if @username.length == 0 redirect_to :action => 'registeruser', :message => "You must give an username" This gives the url: "/user/registeruser?message=You+must+give+an+username" and I can show the message with <%=h @params['message']%>. Is this THE way to go, just add the values from textboxes to the url also? Or is there a way I can do this without using the url-parameters?
on 2006-01-09 14:01
on 2006-01-09 15:14
You could do: if @username.length == 0 @session[:error]="You must give an username" redirect_to :action => 'registeruser' end and then use @session[:error] to access the error
on 2006-01-09 16:09
Hi, On 9.1.2006, at 15.01, Dzei wrote: > For example, in my user-controller: > Is this THE way to go, just add the values from textboxes to the url > also? Or is there a way I can do this without using the url- > parameters? The Rails way of doing this is not to redirect. If there's something wrong with the input data, just re-display the same form: in the controller: @user = User.new(params[:user]) if @user.save redirect_to somewhere_else else # the user input was invalid flash.now(:error) = "There was a problem with your input" render :action => "add_user" end Now the add_user template (the same you used in the original form page) will have an invalid @user object at hand. If you used the Rails form helper methods like text_field (you did, didn't you?), the fields with error will be automatically marked as erroneous. You can also display error_messages_for, which will output a list of all fields that were invalid. Oh, and you shouldn't have to do things like > if @username.length == 0 > redirect_to :action => 'registeruser', :message => "You must > give an > username" yourself. Validations like this belong to the model and the above- mentioned depends on the model validations. See the api docs for validations  for more info. //jarkko  http://api.rubyonrails.com/classes/ActiveRecord/Va...
on 2006-01-09 16:57
You should really read Agile Web Development with Rails. Using flash messages is one of the first things discussed, and if your form was built with scaffolding, then the support is already there.
on 2006-01-09 17:57
Thank you all for your answers. And yes I ordered the Agile Web Development with Rails last week. I hope it ships soon. :)