Attributes stub.

app/models/attribute.rb

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+class Attribute < ActiveRecord::Base
+  belongs_to :attribute_subject, polymorphic: true
+  validates :attribute_subject, presence: true
+  validates_presence_of :type, :value
+end

app/models/attribute/import.rb

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+class Attribute::Import < Attribute 
+  validates_presence_of :import_predicate
+end

app/models/attribute/internal.rb

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+class Attribute::Internal < Attribute 
+  belongs_to :predicate, foreign_key: :controlled_vocabulary_term_id
+  validates :predicate, presence: true
+end

app/models/controlled_vocabulary_term/predicate.rb

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+class ControlledVocabularyTerm::Predicate < ActiveRecord::Base
+end

db/migrate/20131203212239_create_attributes.rb

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+class CreateAttributes < ActiveRecord::Migration
+  def change
+    create_table :attributes do |t|
+      t.string :type
+      t.integer :attribute_subject_id
+      t.string :attribute_subject_type
+      t.integer :controlled_vocabularly_term_id
+      t.string :import_predicate
+      t.string :value
+
+      t.timestamps
+    end
+  end
+end

spec/factories/attribute_imports.rb

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+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :attribute_import, :class => 'Attribute::Import' do
+  end
+end

spec/factories/attribute_internals.rb

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+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :attribute_internal, :class => 'Attribute::Internal' do
+  end
+end

spec/factories/attributes.rb

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+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :attribute do
+    type ""
+    attribute_subject_id 1
+    attribute_subject_type "MyString"
+    controlled_vocabularly_term_id 1
+    import_predicate "MyString"
+    value "MyString"
+  end
+end

spec/factories/controlled_vocabulary_term_predicates.rb

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+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :controlled_vocabulary_term_predicate, :class => 'ControlledVocabularyTerm::Predicate' do
+  end
+end

spec/models/attribute/import_spec.rb

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+require 'spec_helper'
+
+describe Attribute::Import do
+  let (:attribute) {Attribute::Import.new}
+
+  context 'validation' do
+    before(:each) {
+      attribute.valid?
+    }
+    context 'requires' do
+      specify 'import_predicate' do
+        expect(attribute.errors.include?(:import_predicate)).to be_true
+      end
+    end
+  end
+
+end

spec/models/attribute/internal_spec.rb

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+require 'spec_helper'
+
+describe Attribute::Internal do
+  let (:attribute) {Attribute::Internal.new}
+
+  context 'validation' do
+    before(:each) {
+      attribute.valid?
+    }
+    context 'requires' do
+      specify 'predicate' do
+        expect(attribute.errors.include?(:predicate)).to be_true
+      end
+    end
+  end
+end

spec/models/attribute_spec.rb

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+require 'spec_helper'
+
+describe Attribute do
+  let (:attribute) {Attribute.new}
+
+  context 'validation' do
+    before(:each) {
+      attribute.valid?
+    }
+    context 'requires' do
+      specify 'attribute_subject' do
+        expect(attribute.errors.include?(:attribute_subject)).to be_true
+      end
+
+      specify 'value' do
+        expect(attribute.errors.include?(:value)).to be_true
+      end
+
+      specify 'type' do
+        expect(attribute.errors.include?(:type)).to be_true
+      end
+    end
+  end
+end

spec/models/controlled_vocabulary_term/predicate_spec.rb

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+require 'spec_helper'
+
+describe ControlledVocabularyTerm::Predicate do
+  pending "add some examples to (or delete) #{__FILE__}"
+end