Add note about polymorphic associations on have_many
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@ -276,6 +276,23 @@ module Shoulda
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# should have_many(:friends)
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# end
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#
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# Note that polymorphic associations are automatically detected and do not
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# need any qualifiers:
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#
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# class Person < ActiveRecord::Base
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# has_many :pictures, as: :imageable
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# end
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#
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# # RSpec
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# describe Person do
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# it { should have_many(:pictures) }
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# end
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#
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# # Test::Unit
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# class PersonTest < ActiveSupport::TestCase
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# should have_many(:pictures)
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# end
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#
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# #### Qualifiers
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#
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# ##### conditions
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