How to have a default value for datetime_field_tag in Rails

Question

I am trying to have a default value for datetime_field_tag in my view:

=form_tag form_path, method: :get do
  =label_tag :sign_up_at, 'Sign up before:'
  =date_field_tag :sign_up_at, (params[:sign_up_at] || 
                               Time.zone.today.strftime("%Y-%m-%d"))

  =label_tag :last_seen_at, 'Last seen after:'
  =datetime_field_tag :last_seen_at, (params[:last_seen_at] || 
                                     Time.zone.now.strftime("%d-%m-%YT%H:%M"))

  =submit_tag 'Filter', class: 'btn-info'

This results in having a value tag in HTML:

<input type="datetime-local" name="last_seen_at" id="last_seen_at" value="22-05-2017T16:34">

My guess is, I am having some kind of a problem with parsing Time. Can anyone help, please? Thanks!

Updated according to @deephak's answer.

Answer 1

You are using today which will give you just the date not time.

So, when you try to fetch time out of date rails will return 00:00

Example:

Time.zone.today
#=> Mon, 22 May 2017

Time.zone.now
#=> Mon, 22 May 2017 09:34:57 EDT -04:00

To fix this, change

Time.zone.today.strftime("%d-%m-%YT%H:%M")
#=> "22-05-2017T00:00"

to

Time.zone.now.strftime("%d-%m-%YT%H:%M")
#=> "22-05-2017T09:33"

# OR

Time.current.strftime("%d-%m-%YT%H:%M")
#=> "22-05-2017T09:33"