18 lines
722 B
Ruby
18 lines
722 B
Ruby
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class AddFollowUnfollowedAt < ActiveRecord::Migration[5.2]
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# We need up/down migrations because `remove_index` doesn’t allow `unique: true` and can’t be properly rolled back.
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def up
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add_column :follows, :unfollowed_at, :datetime
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remove_index :follows, [:gestionnaire_id, :dossier_id]
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add_index :follows, [:gestionnaire_id, :dossier_id, :unfollowed_at], unique: true,
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name: :uniqueness_index # We need a custom name because the autogenerated name would be too long
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end
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def down
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remove_column :follows, :unfollowed_at
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# We don’t need to remove the index: dropping the column automatically deletes it.
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add_index :follows, [:gestionnaire_id, :dossier_id], unique: true
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end
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end
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