ruby printing database content - ruby-on-rails

Question

I am new in Ruby.
I have to render the database structure, using tutorial i found suitable code:
File index.html.erb:
<h1>Listing tasks</h1>
<table>
<tr>
<th>Title</th>
<th>Content</th>
<th>Date From</th>
<th>Date To</th>
<th></th>
<th></th>
<th></th>
</tr>
<% #tasks.each do |task| %>
<tr>
<td><%= task.title %></td>
<td><%= task.content %></td>
<td><%= task.datefrom %></td>
<td><%= task.dateto %></td>
<td><%= link_to 'Show', task %></td>
<td><%= link_to 'Edit', edit_task_path(task) %></td>
<td><%= link_to 'Destroy', task, :method => :delete, :data => { :confirm => 'Are you sure?' } %></td>
</tr>
<% end %>
</table>
<br />
<%= link_to 'New Task', new_task_path %>
Now i want to group tasks by 'date from' value, probably it means that in index.html.erb i should print only dates, and clicking on the date i should call another html file that will render tasks by chosen date.
this can be like
File index.html.erb:
<h1>Listing dates</h1>
<table>
<tr>
<th>Date From</th>
<% #tasks.each do |task| %>
<tr>
<td><%= !!! IF DATE NOT PRINTED THEN PTINT IT task.datefrom %></td>
<td><%= link_to 'Edit', edit_date_path(task, date) %></td>
</tr>
<% end %>
</table>
<br />
<%= link_to 'New Task', new_task_path %>
Where edit_date_path(task, date) should refer me to the index_date.html.erb, where i can get selected date and print tasks according to selected date.
Maybe i can get suggestion, it will be much easier is fomebody can help me with that, as task should not be very difficult, but otherwise i can waste quite a lot of time googling.
Thanks,
Urmas.
Editing the question.
This helped a little. what i did now, i changed index.html.erb to
<h1>Listing dates</h1>
<table>
<tr>
<th>Date To</th>
<th></th>
</tr>
<% dates = Array.new %>
<% #tasks.each do |task| %>
<% if ( !dates.include?(task.dateto.strftime("%m.%d.%Y")) ) then
dates.push task.dateto.strftime("%m.%d.%Y")
%>
<tr>
<td><%= task.datefrom.strftime("%m.%d.%Y") %></td>
<td><%= link_to 'Show Date', {:action => "index", :date => task.dateto} %></td> <-- This does not work
</tr>
<%
end
%>
<% end %>
</table>
<br />
<%= link_to 'New Task', new_task_path %>
Where 'Show Date' link link should be made to show_date.html.erb, where is correct code for showing records when input date is passed.
I had added in controller also method
def show_date
#tasks = Task.find(params[:dateto])
#dateto = :dateto
respond_to do |format|
format.html # showdate.html.erb
format.json { render :json => #tasks }
end
end
that can be used in the not working link, to pass data to the 'Show Date' (show_date.html.erb), but i get errors all the time. The problem is with correct calling off the show_date.html.erb, code i will be able to write myself :)
Urmas

Answer 1

in Tasks controller:
add a method
def index_date
#tasks = Task.all
end
and create a index_date.html.erb write
<% #tasks.each do |task| %>
<tr> <td><%= task.datefrom %></td>
<td><%= link_to 'Edit', {:action => "index", :date => task.datefrom} %></td>
</tr>
<%end%>
and in the index method in the controller change
#tasks = Task.all to
#tasks = Task.find_all_by_datefrom(#{params[:date])
This will list the tasks that match the date selected and everything will be similar as it is now thereafter.

Answer 2

Found the solution.
It were necessary to add to routes.rb
resources :tasks do
member do
get 'showdate'
end
get "home/index"
end
add corresponding controller processing
def showdate
#task = Task.find(params[:id])
#tasks = Task.find(:all)
respond_to do |format|
format.html # showdate.html.erb
format.json { render :json => #tasks }
end
end
and to call it using (index.html.erb)
<td><%= link_to 'Show Date', showdate_path(task.id) %></td>
All further processing is already in showdate.html.erb.
Hope this helps somebody.
I AM THE BEST!!!! xD