_create_task_modal.html.erb

<div id="createTask" class="modal hide fade custom_modal" style="display: none;">    
  <%= form_for [:admin, task], :url => admin_tasks_path, :remote => true, :html => { :id => 'new-task-form' } do |f| %>
    <div class="modal-header">
      <h3>
        Add New Task
        <span class="pull-right">
          <%= submit_tag "Save", :class => 'btn btn-primary custom_button' %>
          <a href="#" data-dismiss="modal" class="btn btn-small custom_button_dark">Cancel</a>
        </span>
      </h3>
    </div>
    <div class="modal-body">
      <%= render :partial => "admin/shared/ajax_loader" %>   
      <div class="modal-errors"></div>
      <%= render :partial => "admin/tasks/task_form", :locals => { :f => f } %>
    </div>
    <div class="modal-footer">
    </div>
  <% end %>  
</div>

_navbar_create_menu.html.erb

<% if current_user && current_user.authorized? %>
  <li class="dropdown">
    <a href="#" class="dropdown-toggle" data-toggle="dropdown">Create (+)<b class="caret"></b></a>
    <ul class="dropdown-menu">
      <li>
        <a data-toggle="modal" href="#createClient">Add Client</a>
      </li>
      <li>
        <a data-toggle="modal" href="#createContractor">Add Contractor</a>
      </li>
      <li>
        <a data-toggle="modal" href="#createTimesheet">Add Timesheet</a>
      </li>
      <li>
        <a data-toggle="modal" href="#createTask">Add Task</a>
      </li>
      <% if yield(:context_menu_items).present? %>
        <%= yield(:context_menu_items) %>
      <% end %>
    </ul>
  </li>
  <% content_for :modal_partials do %>
    <%= render :partial => "admin/shared/create_client_modal", :locals => {:client => Client.new} %>
    <%= render :partial => "admin/shared/create_contractor_modal", :locals => {:contractor => Contractor.new} %>    
    <%= render :partial => "admin/shared/create_task_modal", :locals => {:task => Task.new} %>
  <% end %>
<% end %>

_task_form.html.erb

<%
  task_types = @task_types
  responsible = @responsible
  client = @client
  
%>
<%= debug task_types %>
<p>
  <%= f.label :task_type, "Type <span class='required'>*</span>".html_safe %>
  <%= f.select :task_type, options_for_select(@task_types), :class => "span4" %>
</p>
<p>
  <%= f.label :subject, "Subject <span class='required'>*</span>".html_safe %>
  <%= f.text_area :subject, :class => "input-xlarge span4" %>
</p>  
<p>
  <%= f.label :responsible, "Responsible <span class='required'>*</span>".html_safe %>
  <%= f.select :responsible, options_for_select(@responsible), :class => "span4" %>
</p>
<p>
  <%= f.label :client, "Client" %>
  <%= f.select :client, options_for_select(@client), :class => "span4" %>
</p>
<p>
  <%= f.label :deadline, "Deadline <span class='required'>*</span>".html_safe %>
  <%= f.text_field :deadline, :id => "task-deadline" %>
</p>

tasks_controller.rb

def create
    @task = Task.new(params[:task])
    @task.merge!(params[:author] => current_user)
    @client_tasks = @task.client_tasks.create(@client.id)
    @client =  Client.all.map(&:name)
    @task_types = ['Follow-up', 'Meeting', 'Email', 'Contract', 'Conference call', 'Note']
    @responsible = User.all.map(&:name)
    
    respond_to do |format|
      if @task.save
        flash[:success] = "<strong>Success!</strong> #{@task.subject} was successfully added.".html_safe
      end
      format.js { render :template => "admin/tasks/create.js.erb", 
        :locals => { 
          :task => @task, 
          :redirect_path => admin_tasks_path,
        }
      } # create.js.erb
    end
  end