rails validate in model that value is inside array[2]

Question

This question similar with this one, but those answers don't work for me(May be they are deprecated). I don't want to reopen old question by bounty, because I have a little different arguments. In my case i have an array like this allowed_values = [99.50..200] and I tried with:

class Thing < ActiveRecord::Base
   validates :price, :inclusion=> { :in => allowed_values }

It does not work. I have tried with so many ways by examples validation here. I have little experience on coding rails. So please, help to find solution.

More info:

       ruby version: ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-linux]
       rails version: Rails 4.1.5

Does the price datatype is Float/Integer? If it is String it won't work. — Gokul
– Gokul, Commented Oct 3, 2016 at 13:46

Andrey Deineko · Accepted Answer · 2016-10-03 12:12:35Z

1

The problem must be with the way you pass the allowed_values array.

You can go with this:

validates :price, inclusion: { in: (99.50..200) }

Or, with a constant:

ALLOWED_VALUES = (99.50..200).freeze
validates :price, inclusion: { in: ALLOWED_VALUES }

answered Oct 3, 2016 at 12:12

Andrey Deineko

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4 Comments

Ulug'bek Over a year ago

it does not work. does it depend on version of ruby or rails ?!

Andrey Deineko Over a year ago

@Ulug'bekRo'zimboyev which version do you use? In which way is this not working? What errors do you get?

Andrey Deineko Over a year ago

@Ulug'bekRo'zimboyev my question is still topical: which errors do you get?

Ulug'bek Over a year ago

it gives no error, why i say does not work, because if i set price=12, it says the model is valid. that's why I said it doesn't work

David Aldridge · Accepted Answer · 2016-10-03 15:04:33Z

1

[99.50..200] is an array that contains a single element: the range (99.50..200).

You are testing whether the value is in the list of objects in the array, but what you probably want is to test whether it is in the range.

So define:

allowed_values = (99.50..200)

instead of:

allowed_values = [99.50..200]

answered Oct 3, 2016 at 15:04

David Aldridge

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Comments

Community · Accepted Answer · 2017-05-23 10:27:45Z

1

I have found a solution: How to implement min/max validator in Rails 3?

validates :price, :inclusion=> { :in => allowed_values }

does not work, it seems, validation style was changed after 3 version of rails. And I tried with:

validates_inclusion_of :number, :in => min_price..max_price

This solution has no valid case if min_price=10.5 and max_price=11

My solution is:

validates :price, :numericality => { :greater_than_or_equal_to => min_price, :less_than_or_equal_to => :max_price }

I don't know ruby(and rails) deeply and I am not right some cases. but this solution is working

edited May 23, 2017 at 10:27

CommunityBot

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answered Oct 4, 2016 at 5:06

Ulug'bek

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