CODEWITHSUNDEEP
rubyruby-on-rails-3activerecord
Yugal Jindle
Yugal Jindle

Reputation: 45646

Validate that a value is in a certain range, e.g. 1 <= val <=2

I want to validate a number :value to be within 1 or 2

validates :value, :format => { :with => /1|2/, :message => "Select number.." }

However, the above code is failing the validation when value == 1

Please ensure that your solution allows me to add a message for the validation.

Upvotes: 24

Views: 15278

Answers (4)

Vedant Agarwala
Vedant Agarwala

Reputation: 18819

If you use inclusion error messages are not good:

["Value is not included in the list"]

Use 

validates :value, presence: true, numericality: { greater_than_or_equal_to: 1, less_than_or_equal_to: 10 }

For better error messages, like:

["Value must be less than or equal to 2"]

Upvotes: 4

loosecannon
loosecannon

Reputation: 7803

if you want it to be a number within 1 and 2 ( 1.5, 1.6839749, etc ) do 

validates_numericality_of :value, :greater_than_or_equal_to => 1, :less_than_or_equal_to => 2, :message => "blah"

may not be what you are looking for but is worth noting,

Upvotes: 15

rubiii
rubiii

Reputation: 6983

You're looking for validates_inclusion_of:

validates_inclusion_of :value, :in => [1, 2],
  :message => "Select one of %{value}"

You can also use the (fairly new) shothand form and a Range instead of an Array:

validates :value, :inclusion => { :in => 1..2 }

Upvotes: 18

Jakob S
Jakob S

Reputation: 20125

validates :value, :inclusion => {:in => [1,2]}

See http://apidock.com/rails/ActiveModel/Validations/HelperMethods/validates_inclusion_of

Upvotes: 36

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