CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3
AnApprentice
AnApprentice

Reputation: 110960

Rails - How to build a custom validation

I have a Rails 3 form, with data-remote => true.

The form field is handle, like a twitter handle. I want to add validation to ensure it's handle friendly, meaning, no spaces, or non-url friendly characters.

Where to start, do I build a customer validation for this?

Thanks

Upvotes: 0

Views: 238

Answers (3)

kriysna
kriysna

Reputation: 6168

In rails 3 the best practice will be using

validates :handle, :format => {:with => /\A[a-zA-Z]+\z/, :message => "Only letters allowed"}

Upvotes: 0

Andrew Marshall
Andrew Marshall

Reputation: 96934

Looks like you want to use validates_format_of

class Product < ActiveRecord::Base
  validates_format_of :handle, :with => /\A[a-zA-Z]+\z/, :message => "Only letters allowed"
end

Change the regular expression pattern to match your needs. See the Rails Guides on validation for more information.

Upvotes: 3

Satya
Satya

Reputation: 4478

Look into validates_each

validates_each :handle do |record,attribute,value|
    # your validation code here, and you can record.errors.add().
end

Upvotes: 1

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