Question

Model:

class Contact < ActiveRecord::Base
  validates :gender, :inclusion => { :in => ['male', 'female'] }
end

Migration:

class CreateContacts < ActiveRecord::Migration
  def change
    create_table "contacts", :force => true do |t|
      t.string  "gender",  :limit => 6, :default => 'male'
    end
  end
end

RSpec test:

describe Contact do
  it { should validate_inclusion_of(:gender).in(['male', 'female']) }
end

Result:

Expected Contact to be valid when gender is set to ["male", "female"]

Anybody has an idea why this spec doesn’t pass? Or can anybody reconstruct and (in)validate it? Thank you.

Answer 1

I misunderstood how the .in(..) should be used. I thought I could pass an array of values, but it seems it does only accept a single value:

describe Contact do
  ['male', 'female'].each do |gender|
    it { should validate_inclusion_of(:gender).in(gender) }
  end
end

I don’t really know what’s the difference to using allow_value though:

['male', 'female'].each do |gender|
  it { should allow_value(gender).for(:gender) }
end

And I guess it’s always a good idea to check for some not allowed values, too:

[:no, :valid, :gender].each do |gender|
it { should_not validate_inclusion_of(:gender).in(gender) }
end