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class CreateRelations < ActiveRecord::Migration
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def self.up
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create_table :relations do |t|
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t.integer :object_id, references: nil
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t.string :object_type
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t.integer :target_id, references: nil
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t.string :target_type
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t.timestamps
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end
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end
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def self.down
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drop_table :relations
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end
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end
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