I have a model defined this way
class Lga < ActiveRecord::Base
validates_uniqueness_of :code
validates_presence_of :name
end
I've defined a factory for Lgas with
Factory.sequence(:lga_id) { |n| n + 10000 }
Factory.define :lga do |l|
id = Factory.next :lga_id
l.code "lga_#{id}"
l.name "LGA #{id}"
end
However, when I run
Factory.create(:lga)
Factory.create(:lga)
in script/console
I get
>> Factory.create(:lga)
=> #<Lga id: 2, code: "lga_10001", name: "LGA 10001", created_at: "2010-03-18 23:55:29", updated_at: "2010-03-18 23:55:29">
>> Factory.create(:lga)
ActiveRecord::RecordInvalid: Validation failed: Code has already been taken
The problem was that code
and name
attributes were not so called lazy attributes. I had thought of writing something like:
Factory.define :lga do |l|
l.code { |n| "lga_#{n+10000}" }
end
but I wanted to reuse the id in the name
attribute too. You can make sure
than id
is evaluated each time Factory.create
is called by putting it in an after_build
hook.
Factory.define :lga do |l|
l.after_build do |lga|
id = Factory.next :lga_id
lga.code = "lga_#{id}"
lga.name = "LGA #{id}"
end
end
This only works in FactoryGirl 1.2.3 and above.
The previous answer is still correct but in newer versions of FactoryGirl you will get a warning.
Factory.next has been depreciated. Use FactoryGirl.generate instead.
New Code should look like this:
Factory.define :lga do |l|
l.after_build do |lga|
id = FactoryGirl.generate :lga_id
lga.code = "lga_#{id}"
lga.name = "LGA #{id}"
end
end
Source: http://notesofgreg.blogspot.co.uk/2012/07/foolproof-factorygirl-sequence.html
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