Re: [Rails] conditional validatiobs

[Colin Law]

On 29 March 2017 at 13:35, fugee ohu <fuge...@gmail.com> wrote:
> Trying to validate presence where another field is not null
> I found this example, the opposite
>
> class Person < ApplicationRecord
> validates :surname, presence: true, if: "name.nil?"
> end
>
> How do I change the if: condition to name not nil?

In this particular case I would use unless:, or "!name.nil?" if you prefer.

Colin

[Jason Knabl]

Use the `unless` key instead of `if` on the validation.

This will perform the validation unless the column is null, i.e., will perform validation if the column is not null.

http://guides.rubyonrails.org/active_record_validations.html#conditional-validation

-Jason

On Mar 29, 2017 8:35 AM, "fugee ohu" <fuge...@gmail.com> wrote:

Trying to validate presence where another field is not null

I found this example, the opposite




class Person < ApplicationRecord

  validates :surname, presence: true, if: "name.nil?"

end




How do I change the if: condition to name not nil?

--
You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group.
To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe@googlegroups.com.
To post to this group, send email to rubyonrails-talk@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/7af99734-ca1f-41d0-9252-7deaad800783%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.