Format with Regular Expression

[khanhhd]

I have an issue with format option: my case is the field accepts 2 types

yyyy/mm/dd hh:nn:ss

or

yyyy-mm-dd hh:nn:ss

My code was:

  validates_datetime :column_name,
   timeliness: {type: :datetime, format: /yyyy[\/-]mm[\/-]dd\shh\:nn\:ss/, allow_blank: true}

The default value in migration is 2000-01-01 00:00:00 But It did not accept the value 2017/11/11 11:11:11

[adzap]

Couple of things. The validation should be written as

validates_datetime :column_name, format: /yyyy[\/-]mm[\/-]dd\shh\:nn\:ss/, allow_blank: true

But specifically, the format option is not meant to be a regexp but a Timeliness format string. The yyyy/mm/dd hh:nn:ss is not a default format but you can add it as a custom format globally.

Try Timeliness.add_formats(:datetime, 'yyyy/mm/dd hh:nn:ss') see how that goes

[adzap]

put the Timeliness line in an initializer.

[khanhhd]

Hello @adzap , Thanks for your reply. I had tried with your code. But It seem does not work

#config/initializers/validates_timeliness.rb
ValidatesTimeliness.setup do |config|
  config.extend_orms = [ :active_record ]
  config.use_plugin_parser = true
  Timeliness.add_formats(:datetime, 'yyyy/mm/dd hh:nn:ss')
end

#model.rb
  validates_datetime :column_name, format: /yyyy[\/-]mm[\/-]dd\shh\:nn\:ss/, allow_blank: true

It does not accept anything even the value is 2011/11/11 11:11:11 or 2011-11-11 11:11:11

[adzap]

Ah sorry I should have been more explicit. After adding that format the validation becomes simply this

validates_datetime :column_name, allow_blank: true

[adzap]

Also for safety move the Timeliness.add_formats call outside the setup do block.

[khanhhd]

@adzap I just want It accepts 2 formats yyyy-mm-dd hh:nn:ss or yyyy/mm/dd hh:nn:ss If we remove format option in model. It also accepts other types. Such as 11-11-2011 11:11:11 , 11/11/2011 11:11:11

[adzap]

That is not really supported directly in the validation. It is really necessary to be so restrictive on the format? How is the datetime being captured, web form?

[khanhhd]

It is read from CSV file, If it is web form then we can validate in client side :) Thanks for your help (y)

[adzap]

ah ok. you can never rely on client side validation alone, but restricting the format would be easier.

[humipine]

i wrote the following codes in the User class at models/user.rb.

validates_date :movedin_date, :allow_blank, :on_or_before => lambda { Date.current }, :format => %r@\d{4}/\d{2}/\d{2}@m

I want the format to be 'yyyy/mm/dd'. But, this is kind of difficult for me, so is it okay to add the following lilne in the initilizer?

Timeliness.add_formats(:date, 'yyyy/mm/dd')
ValidatesTimeliness.setup do |config|
:
end

Humi

[adzap]

yes that should be fine to add to the initializer