The problem is, i cannot use a view helper that i suppose must use,
because it's not available. Normally in a ERB layout i can use the
follow code:
<%= text_field_with_auto_complete :posts, :title %>

Naive as i am i tried
{% text_field_with_auto_complete %} which exploded in a ugly and dirt
error saying that this tag don't exist.

So i suppose that i have to create a custom Tag, right ? I read
already the documentation about "Liquid for Programmers" and i know
how to create my custom def. I can copy and paste the auto_complete
code there but i think it's not the best way to do it right ? There is
another option to do it ?

P.S: I created a patch to related with url encoding. I posted here
last week but i don't know why it's not online. Was it moderated or a
problem with google groups?