method
validates_numericality_of
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Class: ActiveRecord::Validations::ClassMethods
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validates_numericality_of(*attr_names)
public
Validates whether the value of the specified attribute is numeric by trying to convert it to a float with Kernel.Float (if integer is false) or applying it to the regular expression /\A[+\-]?\d+\Z/ (if integer is set to true).
class Person < ActiveRecord::Base validates_numericality_of :value, :on => :create end
Configuration options:
- message - A custom error message (default is: "is not a number")
- on Specifies when this validation is active (default is :save, other options :create, :update)
- only_integer Specifies whether the value has to be an integer, e.g. an integral value (default is false)
- allow_nil Skip validation if attribute is nil (default is false). Notice that for fixnum and float columns empty strings are converted to nil
- greater_than Specifies the value must be greater than the supplied value
- greater_than_or_equal_to Specifies the value must be greater than or equal the supplied value
- equal_to Specifies the value must be equal to the supplied value
- less_than Specifies the value must be less than the supplied value
- less_than_or_equal_to Specifies the value must be less than or equal the supplied value
- odd Specifies the value must be an odd number
- even Specifies the value must be an even number
- if - Specifies a method, proc or string to call to determine if the validation should occur (e.g. :if => :allow_validation, or :if => Proc.new { |user| user.signup_step > 2 }). The method, proc or string should return or evaluate to a true or false value.
- unless - Specifies a method, proc or string to call to determine if the validation should not occur (e.g. :unless => :skip_validation, or :unless => Proc.new { |user| user.signup_step <= 2 }). The method, proc or string should return or evaluate to a true or false value.