Rails newbie: passing a value to hidden form field, then getting it

rubyonrails-talk
1

Warning: I am as green as #00FF00 with rails :slight_smile:

I have an rhtml view that shows a survey: /views/survey/show.rhtml. I have a Survey model, helper and controller. I'm using the acts_as_commentable plugin to collect comments, and trying to save user comments from users who have taken a survey (don't ask -- it's just a test).

To save the comment, I need the id of the survey, which I have when I show the page originally (but which is gone when the user hits the submit button to save their comment. So I am just trying to save the survey id in a hidden field associated with the form.

In the show.rhtml, I have:

  <% form_for :comment, @survey, :url => { :action => :save_comment } do |form| %>     <%= form.hidden_field "survey", "#{@survey.id}" %>     ...   <% end %>

Which results in "ActionView::TemplateError (undefined method `merge' for "1":String)". 1 is the id of the survey, so I am close. I tried numerous variations of passing values via form_for to a hidden field.

Question 1: How to pass the value so I can get at it when the user hits submit

In the survey_controller.rb I have

  def save_comment     @comment = Comment.new(params[:comment])     logger << "COMMENT #{@comment.comment}\n"     # @survey = Survey.find(???) # somehow I need to get that survey id so I can do the next line     @survey.add_comment(@comment)   end

Question 2: what magic do I need to get at the value in the hidden field?

Like I said, I am a noob.

Thanks for your tolerance of my ignorance.

Tom

2

Warning: I am as green as #00FF00 with rails :slight_smile:

heh, me too :slight_smile: but...

submit button to save their comment. So I am just trying to save the survey id in a hidden field associated with the form.

In the show.rhtml, I have:

  <% form_for :comment, @survey, :url => { :action => :save_comment } do |form| %>     <%= form.hidden_field "survey", "#{@survey.id}" %>

Per the doc: <Peak Obsession;

:: a hidden_field takes the same args as a text_field, namely:

  text_field(object_name, method, options = {})

So I think you need something like:

  hidden_field( "comment", "survey", { :value => @survey.id } )

No warranty, express or implied, as they say :slight_smile:

HTH!