CODEWITHSUNDEEP
ruby-on-rails
Brian Roisentul
Brian Roisentul

Reputation: 4740

How to stay at same url when validation fails

I'm using Ruby on Rails 2.3.8 and I've got a registration form in which I receive a parameter as follows: /registration/4, which 4 is the id of a user who recommended the user that is about to register in the website.

The problem is that if the validation fails when the user submits the registation (the form renders to the controller users, action create_particular) the site will redirect to /users/create_particular, and therefore I lose the parameter with value 4 that I had before. Besides, I want the user to stay at the same url, which is /registration/4

How can I do that?

Upvotes: 4

Views: 3062

Answers (5)

jemminger
jemminger

Reputation: 5173

Hidden field. That user ID param has a name by which you extract it in your controller, right? So just put that value in a hidden field of the same name, then it will survive a round-trip.

For example:

<%= hidden_field_tag :referring_user_id, params[:referring_user_id] %>

Upvotes: 0

fl00r
fl00r

Reputation: 83680

Then you should rewrite your create method. You should use redirect_to :back instead of render :action

UPD

def new
  @word = Word.new(params[:word])
  @word.valid? if params[:word]
end

def create
  @word = Word.new(params[:word])
  if @word.save
    redirect_to @word
  else
    redirect_to new_word_path(:word => params[:word] )
  end
end

Looks quite dirty, but this is just a scratch

UPD 2

This is really not the best solution, but it works

# routes.rb
match 'words/new' => 'words#create', :via => :post, :as => :create_word

# words_controller
def new
  @word = Word.new
end

def create
  @word = Word.new(params[:word])

  respond_to do |format|
    if @word.save
      format.html { redirect_to(@word, :notice => 'Word was successfully created.') } 
    else
      format.html { render :action => "new" }
    end
  end
end

# views/words/new.html.erb
<%= form_for(@word, :url => create_word_path) do |f| %>
  ...
<% end %>

Upvotes: 3

Brian Roisentul
Brian Roisentul

Reputation: 4740

Ok I solved the problem by doing the following:

1) I created two routes with the same path, but with different conditions method (one it's post and the other one is set to get)

2) I changed the form in order to post to the POST action defined above

3) I added render => :my_action when the validation fails

So that's pretty much it.

Thanks anyway for all your help.

Upvotes: 0

Lee Kowalkowski
Lee Kowalkowski

Reputation: 11751

Submit to the current URI (e.g. action=""). When the submission is valid, redirect. POST->Redirect->GET is a good habit.

Upvotes: 2

Nikita Barsukov
Nikita Barsukov

Reputation: 2984

From the top of my head:

Edit your controller (registrations_controller.rb file). Create method by default contains following piece of code:

if @registration.save
        format.html {  }
        format.xml {  }
      else
        format.html {  }
        format.xml { }
      end

Add redirect_to (:back) between brackets to else format.html{}

Upvotes: 0

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