Rail 3: instance variable not available after redirection
redirect, ruby-on-rails
Solution
HTTP is stateless by design. If you want to share the state between requests (redirect leads to another request) you should use the `session` hash. Like this:
session[:hotel_id] = @hotel.id
And then you retrieve your `Hotel` in the `/set_location` this way:
Hotel.find(session[:hotel_id])
Problem
I've a got a form wizard of sorts in Rails 3. Basically, I create a hotel object and then when all of that is complete I want to create a location object for that hotel. My controller code for creating the hotel looks like this: ``` def create @hotel = Hotel.new(params[:hotel]) respond_to do |format| if @hotel.save @location = Location.new format.html { redirect_to '/set_location'} else format.html { render action: "new" } end end end ``` Then in the '/set_location' page I have a form which sets the location. However, I'm getting an `'undefined method model_name for NilClass:Class'` error on the html.erb for the @location instance variable. This is really strange as when I use render '/set_location' instead of redirect_to then it works fine. However, I want to use the redirect_to method in order to prevent duplicate record submission. Thanks in advance for any help on this.