DataMapper Dates

Forgive me if this is a simple answer.

But how do you get a Date from a DataMapper proper开发者_Go百科ty. For example:

require 'rubygems'
require 'sinatra'
require 'datamapper'

class Test
    include DataMapper::Resource

    property :id, Serial
    property :created_at, Date
end

get '/:id' do
    test = Test.get(1)

    test.created_at = ?
end

You can access it with the functions from http://ruby-doc.org/core/classes/DateTime.html

For example:

require 'rubygems'
require 'sinatra'
require 'datamapper'

class Test
    include DataMapper::Resource

    property :id, Serial
    property :created_at, Date
end

get '/:id' do
    test = Test.get(1)

    test.created_at.strftime(fmt='%F %T')
end

will return a date formatted YYYY-MM-DD HH:MM:SS

Does that help?

Or indeed

test.created_at.to_time

returns a date such as 2011-07-14 00:09:32 +0100, including the offset.

Or

test.created_at.strftime("%c")

returns a date defined in the local format, such as Thu Jul 14 00:09:32 2011.

Or either of

test.created_at.iso8601
test.created_at.to_s

returns a date in ISO 8601 format, such as 2011-07-14T00:09:32+01:00.

Oh, and it isn't necessary to specify fmt=; you can do

test.created_at.strftime("%F %T")

However, if you just want the date, you can do

test.created_at.to_date.to_s

which returns "2011-07-14".

Bear in mind, also, that you can use created_on, if you only want to store a Date, and never a DateTime.