rails validate specific value

Question

I have this code

I have these options and if the user select anything except 'British Columbia' to give him error message that the province have to 'British Columbia'

I believe it will solve by using the model validation

<%= f.label :province ,"Province (required)"%><br>
    <%= f.select(:province, [["Select One", ""],'Alberta','British Columbia','Manitoba','New Brunswick','Newfoundland and Labrador','Nova Scotia','Northwest Territories','Nunavut','Ontario','Prince Edward Island','Quebec','Saskatchewan','Yukon'], {}) %>

User.rb

  validates :province, presence: "British Columbia"

I had the same problem last week. As mentioned above you've used the wrong validation type. I found this article useful. https://guides.rubyonrails.org/active_record_validations.html#inclusion I hope it helps. — Ben Strachan, Oct 13 '18 at 00:17

score 15 · Accepted Answer · edited Aug 08 '20 at 05:01

15

You shouldn't use presence, it's the wrong validation. You should use inclusion:

validates :province, inclusion: { in: %w[British Columbia] }

You realize this is a nonsensical problem, right? What's the point of offering several alternatives in the view if the validation will only accept one?

edited Aug 08 '20 at 05:01

Patricio Sard

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answered Oct 14 '16 at 23:26

John Feltz

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I wrote it undefined method `British Columbia' for # – nourza Oct 14 '16 at 23:30
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The point might be to add other restrictions, on: :create for example. To allow more values on updates. – Sofia Bravo Apr 27 '17 at 20:25

rails validate specific value

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