How to change to view helper method? - ruby-on-rails

Question

I am working on a app where you can add task etc. I know this is kind of weird but I just like to see how others would implement this. How would you change the following code into a helper method and use it?
The original code
<h2>My Tasks</h2>
<% task = #work.tasks %>
<% if task.empty? %>
<%= link_to 'Create a new task', new_task_path %>
<% else %>
<%= render :partial => 'notes/note', :locals => {:note => #note} %>
<% end %>
My way of doing a helper method
def task_check
task = #work.tasks
if task.empty?
link_to 'Create a new task', new_task_path
else
render :partial => 'notes/note', :locals => {:note => #note}
end
end
In my view
<%= #work.task_check %>

Answer 1

Personally, I wouldn't extract this out at all, this is view logic and it belongs in the views. It definitely doesn't belong in a model, but it could arguably be extracted into a helper. I'd change it slightly:
<h2>My Tasks</h2>
<% if #work.tasks.blank? %>
<%= link_to 'Create a new task', new_task_path %>
<% else %>
<%= render :partial => 'notes/note', :locals => {:note => #note} %>
<% end %>
Calling blank? instead of empty? will work even if #work.tasks is nil
.

Answer 2

You can't define a helper in the model. It won't have access to render, link_to or any other controller or view methods. So just define your method almost exactly as is in a file in your helpers directory, maybe application_helpers.rb or work_helpers.rb:
def task_check(work, note)
task = work.tasks
if task.empty?
link_to 'Create a new task', new_task_path
else
render :partial => 'notes/note', :locals => {:note => note}
end
end
And then call it in your view like so:
<%= task_check(work, note) %>