73 lines
1.9 KiB
Ruby
73 lines
1.9 KiB
Ruby
# When a user is destroyed, some of their associated records are
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# moved to a "Ghost User", to prevent these associated records from
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# being destroyed.
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#
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# For example, all the issues/MRs a user has created are _not_ destroyed
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# when the user is destroyed.
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module Users
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class MigrateToGhostUserService
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extend ActiveSupport::Concern
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attr_reader :ghost_user, :user
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def initialize(user)
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@user = user
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end
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def execute
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transition = user.block_transition
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user.transaction do
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# Block the user before moving records to prevent a data race.
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# For example, if the user creates an issue after `migrate_issues`
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# runs and before the user is destroyed, the destroy will fail with
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# an exception.
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user.block
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# Reverse the user block if record migration fails
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if !migrate_records && transition
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transition.rollback
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user.save!
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end
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end
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user.reload
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end
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private
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def migrate_records
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user.transaction(requires_new: true) do
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@ghost_user = User.ghost
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migrate_issues
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migrate_merge_requests
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migrate_notes
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migrate_abuse_reports
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migrate_award_emojis
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end
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end
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def migrate_issues
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user.issues.update_all(author_id: ghost_user.id)
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Issue.where(last_edited_by_id: user.id).update_all(last_edited_by_id: ghost_user.id)
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end
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def migrate_merge_requests
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user.merge_requests.update_all(author_id: ghost_user.id)
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MergeRequest.where(merge_user_id: user.id).update_all(merge_user_id: ghost_user.id)
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end
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def migrate_notes
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user.notes.update_all(author_id: ghost_user.id)
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end
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def migrate_abuse_reports
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user.reported_abuse_reports.update_all(reporter_id: ghost_user.id)
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end
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def migrate_award_emojis
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user.award_emoji.update_all(user_id: ghost_user.id)
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end
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end
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end
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