13 May 2009, 4:16pm
Ruby on Rails:
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5 comments

Custom Date Formats for Your Rails Application

If you use a consistent date format often in your Rails applciation, it is worth it to add the format to your application environment. You can do this by adding  it to the bottom of the config/environment.rb file.

Time::DATE_FORMATS[:my_custom_format] = "%A %B %d, %Y"

Now you can use it in your views like this

@post.created_at.to_s(:my_custom_format)

Which will output something like Monday May 5, 2009

  • http://gregmoreno.ca Greg Moreno

    Or you can store the format a file config/initializers/date_formats.rb with the ff code:

    ActiveSupport::CoreExtensions::Date::Conversions::DATE_FORMATS.merge!(
    :my_custom_format => “%A %B %d, %Y”
    )

  • bseanvt

    Thanks! I was using a datetime type field from the db (created_at/updated_at) so I needed to add it to the Time module instead.

    ActiveSupport::CoreExtensions::Time::Conversions::DATE_FORMATS.merge!(
    :simple => “%A %B %d, %Y”
    )

  • http://snoble.net Steven Noble

    Cheers for this.

    I have the following in /config/initializers/time_formats.rb:

    ActiveSupport::CoreExtensions::Time::Conversions::DATE_FORMATS.merge!(
    :sentence => lambda { |date| date.strftime(“%B #{date.day.ordinalize}, %Y, at %l.%M”) + date.strftime.downcase(“%p”) }
    )

    I have the following in a view:

    I get this error when I load the view in a browser:

    wrong number of arguments (0 for 1)

    I get no error (but no formatting) if I instead use this in the view:

    Any idea what’s going on?

  • admin

    Yeah, You have the wrong method order converting AM/PM to lowercase.

    You have in your code

    date.strftime.downcase(”%p”)

    But you need

    date.strftime("%p").downcase

    You’re getting an argument error because of this.

  • http://snoble.net Steven Noble

    Love your work. Got it in one.

 
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