Help with time_select?

I didn’t understand the docs and neither found any videos on raiscast so
I’m
asking here.

I gotta store the opening_hours and closing_hours of a company_layout
model
(which belongs_to a company model).
How can I do that with time_select? what type should it be on my
database
(t.time? t.integer?)?

And how can I retrieve this information for a show view?

So far I have done this with the helpers:

def lines_of_work
[[‘Clothes’, 1], [‘Shoes’, 2], [‘Restaurant’, 3]]
end

def line_of_work(line_of_work_id)
lines_of_work[line_of_work_id - 1][0]
end

for my company model (and store t.integer line_of_work_id in the company
migration)

And that in the view for new company:

<%= f.label :line_of_work %>
<%= select(:company, :line_of_work_id, lines_of_work, :prompt => true)
%>

At the show view:

Line of work: <%= line_of_work(@company.line_of_work_id) %>

If anyone can help me with the hours stuff and maybe a better way to
store
the lines of work thing I appreciate it.

Thank you,
Rodrigo