27 lines
775 B
Ruby
27 lines
775 B
Ruby
# See http://doc.gitlab.com/ce/development/migration_style_guide.html
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# for more information on how to write migrations for GitLab.
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class RemoveDuplicateMrEvents < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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class Event < ActiveRecord::Base
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self.table_name = 'events'
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end
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def up
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base_condition = "action = 1 AND target_type = 'MergeRequest' AND created_at > '2017-08-13'"
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Event.select('target_id, count(*)')
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.where(base_condition)
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.group('target_id').having('count(*) > 1').each do |event|
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duplicates = Event.where("#{base_condition} AND target_id = #{event.target_id}").pluck(:id)
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duplicates.shift
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Event.where(id: duplicates).delete_all
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end
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end
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def down
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end
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end
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