Re: [Rails] Converting a Time to a String and Back in Rails 4.0.0

Ruby on Rails Thursday, August 22, 2013

On Wed, Aug 21, 2013 at 8:55 PM, Phil <phil@edgedesign.us> wrote:

It's not a 'valid' vs. invalid argument

Of course it is. What you consider valid or not is irrelevant, it's defined in the language.

You happened to be lucky in picking a format (%m/%d/%Y) that worked in Ruby 1.8.7;

the opposite day/month placement %d/%m/%Y doesn't:

1.8.7 :008 > Date.parse(Date.today.strftime('%m/%d/%Y')).to_s

=> "2013-08-22"

1.8.7 :009 > Date.parse(Date.today.strftime('%d/%m/%Y')).to_s

ArgumentError: invalid date

As Tamara suggests, it appears the format string is being dropped by the time it makes it to the parsing function(?).

Date.parse doesn't take a format argument. The Rails String#to_date

helper uses Date.parse. It "used to work" because you were lucky.

I can see an argument for replacing that with Date.strptime; why not

try it and see if anything breaks? :-)

Add your use case to the tests and go for it.

--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
http://about.me/hassanschroeder
twitter: @hassan

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