association problem

[Stefan Wintermeyer]

Hi,

my situation:

manufacturer.rb:
# id :integer not null, primary key
# name :string(255)
has_many :ouis
has_many :phones

oui.rb
# id :integer not null, primary key
# value :string(255)
# manufacturer_id :integer
belongs_to :manufacturer

phone.rb
# id :integer not null, primary key
# mac_address :string(255)
# manufacturer_id :integer
belongs_to :manufacturer

The Oui stores the first 6 digists of the mac address in the field
value. A phone's mac address (stored in mac_address) has to start with
these 6 digits. I wrote a validation for that. The validation works
but I can't find out how I can create a factory for phone which
creates a manufacturer factory with a oui factory and than uses the
value field of that last factory to generate a random mac_address for
the phone.

Could someone tell me the magic to solve this?

Stefan

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[Joe Ferris]

Can you use an after_build hook to create a Oui with the first 6 digits of the mac address?

Factory.define :phone do |factory|

  factory.mac_address { Factory.next(:mac_address) }

  factory.after_build do |instance|

    Factory(:oui, :manufacturer => instance.manufacturer, :value => instance.mac_address.slice(0, 6))

  end

end

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[Stefan Wintermeyer]

On Fri, Jan 28, 2011 at 3:55 PM, Joe Ferris <jfe...@thoughtbot.com> wrote:
> Can you use an after_build hook to create a Oui with the first 6 digits of
> the mac address?
> Factory.define :phone do |factory|
>   factory.mac_address { Factory.next(:mac_address) }
>   factory.after_build do |instance|
>     Factory(:oui, :manufacturer => instance.manufacturer, :value =>
> instance.mac_address.slice(0, 6))
>   end
> end

Bingo!

Thank you so much.