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class CreateHackSets < ActiveRecord::Migration[5.2]
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def change
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create_table :hack_sets do |t|
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t.references :hack
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t.text :input
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t.text :output
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t.integer :position
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t.timestamps
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end
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add_index :hack_sets, [:hack_id, :position], unique: true
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end
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end
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