Module: GS1::Extensions::DateMonthBased

Included in:
GS1::ExpirationDate
Defined in:
lib/gs1/extensions/date_month_based.rb

Overview

Extension for a GS1 date. Ensures correct formating and validation.

OBS! Month-based expiry

Expiry dates for a batch of medicinal product are generally set by month, rather than day. If a batch expires in March 2021, for example, it expires at the very end of the month. From the 1st April 2021, the EMVS will report that the pack identifier has expired if it has not already been decommissioned for some other reason.

Manufacturers represent expiry by month in one of two ways. They either set the expiry date to be the last day of the month or they set the day component of the date (DD) to ‘00’. Examples are shown below:

Format A: 210331 Format B: 210300

These two formats effectively indicate the same expiry date. The first specifies a specific day (the last day of the month). The second specifies only the month of expiry.

The format used in the barcodes must be exactly the same as the format used within the EMVS. If the manufacturer uploads batch data to the European Hub using one format, but prints the barcodes using the other, the dates will not match and the national system will raise ‘potential falsified medicine’ alerts. In this case, the packs cannot be supplied until the manufacturer corrects the data within the EMVS.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/gs1/extensions/date_month_based.rb', line 28

def self.included(base)
  base.define :date_month_based
  base.define :length, barcode: 6
end

Instance Method Details

#initialize(date) ⇒ Object 



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# File 'lib/gs1/extensions/date_month_based.rb', line 33

def initialize(date)
  if date.respond_to?(:strftime)
    super(date.strftime('%y%m%d'))
  else
    super(date)
  end
end

#to_date ⇒ Object 



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# File 'lib/gs1/extensions/date_month_based.rb', line 41

def to_date
  to_date_format_a || to_date_format_b
end