Select tag rails - ruby-on-rails

Question

I have a view where I need to show a list of pages (I have a model called Page) and then i need the id of the selected page
I have this code in the view
مهمة جديدة
: <%= form_for :task, :url => {:action=>"create", :controller=>"tasks"}, :html => {:class :
=> "nifty_form"} do |f| %>
<% if #task.errors.any? %>
<div id="error_explanation">
<h2>: عذرا لم نستطع استكمال طلبك</h2>
<ul>
<% #task.errors.full_messages.each do |msg| %>
<li style="color:red;"><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label "اسم المهمة" %><br />
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label "وصف المهمة" %><br />
<%= f.text_area :description %>
</div>
<div class="actions">
<button><%= link_to 'العودة الى قائمة المهام', project_tasks_path %></button>
<%= f.submit "مهمة جديدة"%>
</div>
<%= select_tag(:page, options_for_select(['a',1])) %>
<% end %>
#pageslist is a 2d array of the form [['pagename', 1], ..]
The question is how can i access the page_id of the selected page in the controller ?
I tried params[:p_id] but it is not working any help please?
This is what I have in the controller:
#task = Project.find(params[:project_id]).tasks.new(params[:task])
#task.update_attributes({:page_id => params[:p_id]})

Answer 1

Assuming that #pagelist is in a format as you described, then in your view:
<%= select_tag(:page, options_for_select( #pagelist )) %>
You had missed it in your example, and provided only 1d array for options_for_select.
With such prepared view your create action will receive page id in:
params[:page]
it's because you had passed :page as a first argument for select_tag.