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class EnforceUniqueTemplates < ActiveRecord::Migration[6.0]
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def up
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# Duplicates should only occur when two concurrent seeds hit a race condition,
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# so it should be safe to drop any duplicates, preferring the newest one
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Template.where.not(id: Template.group(:name, :type).pluck("max(id)")).each do |template|
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say "Deleting duplicate #{template.type.underscore.humanize}: #{template.name}"
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template.update_columns(locked: false)
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template.destroy
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end
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add_index :templates, [:type, :name], unique: true
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end
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def down
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remove_index :templates, [:type, :name]
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end
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end
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