CODEWITHSUNDEEP
ruby-on-railsrails-activerecord
x-yuri
x-yuri

Reputation: 18843

How do I recognize invalid dates in rails?

When modifying Active Record object's attributes (like Task.update date: '2015-01-01'), I'd like to know when the value is invalid ('2015-01-32' or 'whatever'). Right now, activerecord just writes nil in case of those, not very friendly I must say. Previous value is lost. I'd like to leave it there, if user inputted nothing like date.

Is there any more sensible way to figure it out than the following?

if ActiveRecord::Attribute.from_user('date', '2015-01-32', ActiveRecord::Type::Date.new).value
  puts 'valid date'
end

P.S. Just in case someone wants to know how type casting happens.

Upvotes: 1

Views: 64

Answers (2)

x-yuri
x-yuri

Reputation: 18843

If there's no way to tell activerecord to not discard values, and no public interface for checking if a date is valid, than the best option must be to use validation:

class Task < ActiveRecord::Base
  validates_date :date
end

Upvotes: 1

mohamed-ibrahim
mohamed-ibrahim

Reputation: 11137

you can try to parse it and when it raise error then its nit valid:

valid = Date.parse('2015-01-30').present? rescue false  # true

valid = Date.parse('2015-01-32').present? rescue false  # false

Upvotes: 0

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