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Versions: 6
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Contents
module Volt
class NumericalityValidator
def self.validate(model, old_model, field_name, args)
# Construct the class and return the errors
self.new(model, field_name, args).errors
end
attr_reader :errors
def initialize(model, field_name, args)
@field_name = field_name
@args = args
@errors = {}
@value = model.read_attribute(field_name)
# Convert to float if it is a string for a float
@value = Kernel.Float(@value) rescue nil
check_errors
end
def add_error(error)
field_errors = (@errors[@field_name] ||= [])
field_errors << error
end
# Looks at the value
def check_errors
if @value && @value.is_a?(Numeric)
if @args.is_a?(Hash)
@args.each do |arg, val|
case arg
when :min
if @value < val
add_error("number must be greater than #{val}")
end
when :max
if @value > val
add_error("number must be less than #{val}")
end
end
end
end
else
message = (@args.is_a?(Hash) && @args[:message]) || 'must be a number'
add_error(message)
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems