Regexp matching with custom validation rails

Question

Trying to create a custom validation method but getting an error

wrong number of arguments (0 for 1..3)

I want to validate the format of a postcode but provide a custom error message as opposed to the message i get if i was to do this

validates_format_of :postcode, with: /\A^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])[ ]{0,1}[0-9][ABD-HJLNP-UW-Z]{2})$\z/i, message: 'Please check your postcode'

This will give an error message of

postcode Please check your postcode

So i though i could do this

class User < ActiveRecord::Base
validate :format_postcode

 def format_postcode
  regexp = /\A^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW])[ ]{0,1}[0-9][ABD-HJLNP-UW-Z]{2})$\z/i
   if !postcode.match(regexp)
     errors.add[:base] << "Please check your Postcode"
   end
 end
end

But this is throwing the error

What am i doing wrong here?

Thanks

Patrick Oscity · Accepted Answer · 2014-10-07 13:36:48Z

1

The problem is this line

errors.add[:base] << "Please check your Postcode"

it should be

errors.add :base, "Please check your Postcode"

As the error message suggests, add is a method that takes 1..3 arguments, not a getter for an array.

answered Oct 7, 2014 at 13:36

Patrick Oscity

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1 Comment

Richlewis Over a year ago

thanks, silly error there really... thanks for pointing that out, i ended up using errors[:base] << "Please check your Postcode"

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